Garmin Marine GPS System 190 00683 00 User Manual

WARNING: This product, its packaging, and its components contain chemicals known to the State of California to cause cancer, birth defects, or reproductive

harm. This Notice is provided in accordance with California’s Proposition 65. See www.garmin.com/prop65 for more information.

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IntroductIon > IMPortAnt InforMAtIon And bAttery WArnIngs

Important Information

Battery Warnings

MAP DATA INFORMATION: One of the goals of Garmin is to provide

customers with the most complete and accurate cartography that is available

to us at a reasonable cost. We use a combination of governmental and private

data sources, which we identify in product literature and copyright messages

displayed to the consumer. Virtually all data sources contain some inaccurate or

incomplete data. In some countries, complete and accurate map information is

either not available or is prohibitively expensive.

If these guidelines are not followed, the internal lithium-ion battery may

experience a shortened life span or may present a risk of damage to the GPS

unit, ﬁre, chemical burn, electrolyte leak, and/or injury.

•

Do not leave the unit exposed to a heat source or in a high temperature

location, such as in the sun in an unattended vehicle. To prevent

damage, remove the unit from the vehicle or store it out of direct

sunlight, such as in the glove box.

NOTICE REGARDING WINDSHIELD MOUNTING; SPECIAL

NOTICE TO DRIVERS IN CALIFORNIAAND MINNESOTA: State law

prohibits drivers in California and Minnesota from using suction mounts on

their windshields while operating motor vehicles. Check your state and local

laws and ordinances for similar restrictions. Other Garmin dashboard or friction

mounting options should be used. Garmin does not take any responsibility for

any ﬁnes, penalties, or damages that may be incurred as a result of disregarding

this notice or as a result of any other state or local law or ordinance relating

to use of the unit. (See California Vehicle Code Section 26708(a); Minnesota

Statutes 2005, Section 169.71.)

•

Do not puncture or incinerate.

When storing the unit for an extended time, store within the following

temperature range: 32° to 77°F (0° to 25°C).

•

Do not operate the unit outside of the following temperature range: -4°

to 131°F (-20° to 55°C).

Contact your local waste disposal department to properly recycle/

dispose of the unit/battery.

Additional User-Replaceable Battery Warnings:

•

Do not use a sharp object to remove the battery.

Keep the battery away from children.

The California Electronic Waste Recycling Act of 2003 requires the

recycling of certain electronics. For more information on the applicability to

this product, see www.erecycle.org.

Do not disassemble, puncture, or damage the battery.

If using an external battery charger, only use the Garmin accessory

approved for your product.

•

Only replace the battery with the correct replacement battery. Using

another battery presents a risk of ﬁre or explosion. To purchase a

replacement battery, see your Garmin dealer or the Garmin Web site.

vꢀ

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Unit Overview

The GPSMAP 378/478 is an all-in-one, versatile color chartplotter and automobile navigator—perfect for land or water. This portable GPS

navigator features a 256-color TFT display that is easy to read in bright sun and includes built-in g2 cartography (GPSMAP 478) or built-in

lake cartography (GPSMAP 378), and preloaded City Navigator NT^®to provide you with automatically generated turn-by-turn directions.

With the optional GXM 30 antenna and a subscription to XM WX Satellite Weather, users have constant access to NEXRAD radar, lightning,

wind speed, wave direction, and more. In addition, the GPSMAP 378/478 offers XM Satellite Radio capabilities featuring more than 160

digital channels of commercial-free music; more than 30 channels of news, sports, talk, and entertainment; and more than 20 dedicated

channels of XM Instant Trafﬁc & Weather.

Detachable GPS antenna

GPS antenna

256-Color TFT display

collapses for storage.

Be sure the antenna ꢀs

up (as shown here)

to receꢀve satellꢀte

signals. See the

“Appendꢀx”,

Battery pack. Press tab down

to remove battery pack for

replacement, if necessary.

with backlighting

page 12 2, for

ꢀnstructꢀons on

removing the

antenna.

External power

connector under

weather cap

USB/GXM 30

antenna connector

under weather cap

Headphone/stereo jack

under weather cap

Backlit keypad for easy nighttime operation

Serꢀal number

Slot for optional data card

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Using Charge Mode

If you want to charge the battery when you are not using the unit,

you can put the unit into Charge Mode.

Charging the GPSMAP 378/478

Before using the GPSMAP 378/478, you might need to charge

the battery. Plug the power cable into an external power source to

charge. You can use the unit while it is charging.

To charge the unit’s battery:

1. Lift the rubber weather cap to expose the power connector

on the back of the unit. See the image on page 1 for

connector location.

2. Align the notches and push the plug into the connector until

fully seated.

3. Plug the 12-Volt adapter into an available AC outlet, or

cigarette lighter receptacle if you have a cigarette lighter

adapter. Use care when routing the cable; make sure it does

not interfere with vehicle operation. The unit begins charging

as soon as external power is applied.

NOTE: While in Charge Mode, the GPSMAP 378/478 draws a

small amount of current from the vessel/vehicle battery. To avoid

discharging the vehicle’s battery, disconnect the external power

cable from the unit when not in use for several days.

TIP: Placing the unit in Charge Mode charges the unit more

quickly than when the unit is turned on, and reduces draw on the

vehicle/vessel battery.

Over time, you might notice that the lithium-ion battery in the unit

is not holding a charge any more. This is common for lithium-ion

batteries. Contact Garmin or your Garmin dealer to order a battery

pack replacement if you are experiencing charging issues.

When you turn on the GPSMAP 376C the power source indicator on

the GPS tab shows the unit is operating off battery power (

that the unit is charging ( ), or that an external power source is

in use (

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Adjusting the Backlight and Volume

Turning On the GPSMAP 378/478

Before you turn on the GPSMAP 378/478, be sure the antenna is up

as shown on page 1, and it has a clear and unobstructed view of the

sky to receive satellite signals.

You can adjust the backlight to see the screen better. If you are

using the external speaker with 12/24-Volt adapter cable with

the GPSMAP 378/478 or you have headphones plugged into the

headphone jack, you can adjust the volume level of the audio output.

The ﬁrst time you turn on your GPSMAP 378/478, the GPS receiver

must collect satellite data and establish its current location. To

ensure proper initialization, the GPSMAP 378/478 is shipped from

the factory in AutoLocate Mode, which allows the receiver to “ﬁnd

itself” anywhere in the world.

To adjust the backlight level or volume:

1. Press and quickly release the POWER key.

2. Press up on the ROCKER to increase the brightness or

press down to decrease. Press right to raise the volume or

left to lower.

To turn the GPSMAP 378/478 on and off:

1. Press and hold the POWER key. When the unit turns on, a

tone sounds and the Warning Page opens.

3. Press ENTER or QUIT to close the Backlight/Volume

adjustment window.

Battery time remaining and power source indicator

Warning Page

Volume

adjustment slꢀder

Backlight

adjustment slꢀder

2. Read the warning, and then press ENTER to continue.

3. To turn off the GPSMAP 378/478, press and hold the

POWER key again.

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As the receiver locks onto satellites, a signal strength bar appears

for each satellite in view, with the appropriate satellite number

underneath each bar. The numbers below each bar represent the

particular satellite that is being received. Numbers above 33 indicate

WAAS satellites.

Getting Satellite Signals

After you turn on the GPSMAP 378/478, the unit automatically

begins searching for satellites. The GPS Page appears while the unit

is gathering satellite signals and acquiring a ﬁx, which should take

only a few minutes. While the GPSMAP 378/478 is getting satellite

signals, the GPS Page shows the status as “Acquiring Satellites.”

The sky view shows a bird’s eye view of the position of each

satellite relative to the receiver’s last known position. The outer

circle represents the horizon (north up), the inner circle represents

45º above the horizon, and the center point represents a position

directly overhead. You can also set the sky view to a Track Up

conﬁguration, causing the top of the sky view to align along your

current track heading. Press MENU to change the conﬁguration of

the sky view.

Receꢀver

status ﬁeld

Signal

strength bars

GPS Tab

NOTE: While acquiring satellites, the Map Page might show

the wrong location, such as China. You need to wait a few more

minutes to acquire satellites and ﬁnd your current location.

Sky view

Power

source

ꢀndꢀcator

Viewing GPS Status with the GPS Tab

The GPS tab provides a visual reference of satellite acquisition,

receiver status, and accuracy. The sky view and signal strength bars

show what satellites are visible to the receiver and whether they are

being tracked.

GPS Page

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The progress of satellite acquisition is shown in three stages:

•

2D GPS Location—At least three satellites were acquired

and a two-dimensional position ﬁx was calculated.

“2D Differential” appears when you are receiving DGPS

corrections in 2D mode, and a “D” appears on the strength bar

of satellites being corrected.

•

No signal strength bars—the receiver is looking for the

satellites indicated.

White signal strength bars—the receiver has found the

satellite and is collecting data.

3D GPS Location—At least four satellites were acquired

and a three-dimensional ﬁx was calculated. “3D Differential”

appears when you are receiving DGPS corrections in

3D mode, and a “D” appears on the strength bar of satellites

being corrected.

Green signal strength bars—the receiver has collected the

necessary data from this satellite.

When the GPSMAP 378/478 collects the necessary data from the

best satellites in view to calculate a ﬁx, the status ﬁeld indicates the

status of the receiver. The unit then updates the location, date and

time.

•

Lost Satellite Reception—the receiver is no longer tracking

enough satellites for a 2D or 3D ﬁx.

Receiver Not Usable—the receiver is unusable, possibly due

to interference or abnormal satellite conditions. Turn the unit

off and back on to reset it.

Receiver Status

The Receiver Status ﬁeld shows one of the following conditions:

•

Searching the Sky—the receiver is looking for satellites.

•

Simulating GPS—the receiver is in Simulator Mode.

GPS Off—the GPS receiver is turned off.

AutoLocate—the receiver is looking for any satellite whose

almanac was collected, which can take up to ﬁve minutes.

•

Acquiring Satellites—the receiver is looking for and

collecting data from satellites visible at its last known or

initialized location but has not acquired a ﬁx.

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GPS Options

Press MENU twice to open the Main Menu. Use the ROCKER to

highlight the GPS tab. Press MENU to open the options menu.

GPS Tips

While the receiver is gathering information, your location on the

map might appear different from where you are actually located.

As soon as the receiver gathers enough satellite information, your

proper location appears on the map.

Any time you have traveled more than 600 miles with the GPS

receiver turned off, the receiver might take longer than normal to

initialize and ﬁnd your location.

The GPS receiver can lose satellite signals due to interference from

such items as buildings, tunnels, and heavy tree cover. Monitoring

the GPS status is recommended.

Start/Stop Simulator—starts and stops Simulator Mode, which is

helpful when learning how to use your unit.

To learn about GPS, visit www.garmin.com/aboutGPS/.

Enable/Disable WAAS—enables or disables WAAS capability. See

page 124 of the “Appendix” for more information about WAAS.

Track Up Skyview/North Up Skyview—orients the sky view

display on the GPS Page to North up or Track up.

New Altitude—allows you to manually enter your altitude.

New Location—allows you to enter a new location automatically or

using the map.

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Using the GPSMAP 378/478 Keypad

PAGE/MODE Key

IN Key/OUT Key

•

Press to adjust map scale to show a larger area with

less detail (zoom out) or a smaller area with more

detail (zoom in).

•

Press to cycle through main pages in sequence and

exit a submenu page.

•

Press and hold to switch between Marine and

Automotive Modes.

ROCKER

Press up, down, left, or right to highlight options

QUIT Key

•

Press to cycle through main pages in reverse

sequence, revert to the previous value in a data

entry ﬁeld, or cancel an unintended function.

and to enter data, or use to pan the arrow on the

Map Page.

NAV/MOB Key

ENTER/MARK Key

•

Press to show the Navigate Menu.

•

Press to select a highlighted option.

In Marine Mode, press and hold to start the MOB

function.

Press and hold to mark your current location as a

waypoint.

In Automotive Mode, press and hold to show the

Next Turn page and announce the next turn when

using the external speaker.

MENU/Wx Key

•

Press to open the options menu for the current page.

Press twice to show the Main Menu.

FIND Key

Press and hold to toggle XM WX weather on or off

on the Map Page.

•

Press to quickly search for and access user

waypoints, cities, and other items used for

navigation.

POWER Key

•

Press and hold to turn the unit on or off.

Press and release to adjust the backlighting and

external speaker volume.

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•

Default—the factory setting saved in the unit’s memory. You

can change the settings, and you can also revert to the factory

(default) settings when you select Restore Defaults.

Using the GPSMAP 378/478

The advanced keypad system on the GSPMAP 378/478 is

designed to allow you to select options and enter data quickly and

conveniently. As you progress through this owner’s manual, you

are directed to press a speciﬁc key or highlight a ﬁeld on the screen.

When you are directed to press a key, you should press and quickly

release the key. If the key needs to be held down for a period of time

to start a secondary function, the instructions will tell you to do so.

When a ﬁeld is selected on the screen, it is highlighted in yellow.

Fꢀeld

The following terms are used throughout this manual:

Highlighted ﬁeld

On-screen buttons

•

Highlight—move the highlighted area on the screen up,

down, left, or right with the ROCKER to select individual

ﬁelds. Moving the highlight to a given location allows you to

make a selection, begin data entry, or scroll through a list.

Cartography

The GPSMAP 378 system contains preloaded U.S. inland freshwater

cartography to its enhanced worldwide basemap information.

The preloaded inland maps offer 50-meter shoreline resolution

throughout the US, with even more detailed 10-meter resolution on

select lakes. Other details include depth contours, tide and current

data, boat ramps, mile markers, hazards, marinas, campgrounds, area

roads, and more.

•

Field—the location on a page where data or an option can

be shown and entered. Select (highlight) a ﬁeld using the

ROCKER to begin entering data or selecting options.

•

On-screen button—use the ROCKER to highlight a button

and press ENTER to select the button.

Scroll bar—when viewing a list of items too long to appear

on the screen, a scroll bar appears along the right side of

the list. To scroll through a list, press up or down on the

ROCKER.

The GPSMAP 478 system contains preloaded marine map detail

utilizing BlueChart^®g2 technology. Coverage is for US coastal

areas.

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To exit a menu or return to the previous setting:

Press QUIT. The QUIT key moves backward through your

steps. Press QUIT repeatedly to return to the starting page.

Selecting Options and Entering Data

To enter data and select options use the ROCKER to highlight,

select, or choose an item in a list or a ﬁeld on the screen. Use the

ENTER key and the ROCKER to select options, enter names and

numbers in data ﬁelds, and activate your selections.

To select an on-screen button:

On a page with on-screen buttons, use the ROCKER to

highlight an on-screen button, and press ENTER.

To select and activate an option:

1. From any page, press MENU. An options menu shows a list

of optional features to that page.

On-screen

button

To mark your current location as a waypoint, press and hold

ENTER/MARK until the New Waypoint Page opens.

2. Use the ROCKER to move the highlight up, down, right, or

To enter data in a data ﬁeld:

1. Use the ROCKER to highlight the data ﬁeld you want, and

left on the menu to the option you want to select.

press ENTER to edit it.

3. Press ENTER to select the feature. Another window with

more options might appear. If so, select an option and press

ENTER again.

2. Press up or down on the ROCKER to select characters.

Press right to move to the next character or press left to

move back to the previous character. If there are two lines of

data, keep pressing right on the ROCKER to drop to the next

line.

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Restoring Default Settings

You can restore factory defaults for the following Main Menu tabs:

Track, Alarms, Display, Sound, and Setup. For more information

about the Main Menu, see the “Main Menu ” section beginning on

page 67.

Entering

data

To restore default settings:

1. Press MENU twice to open the Main Menu.

2. Use the ROCKER to highlight a tab, and then press MENU to

TIP: To clear the entire data ﬁeld, highlight the left-most

character ﬁeld and press left on the ROCKER again.

open the options menu.

3. Press ENTER.

Not all ﬁelds are programmable. When you are on a page with ﬁelds

that are not selectable, the highlight skips over them.

Setup Tab Options Menu

3. Highlight Restore Default, and press ENTER.

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By default, the Main Menu tabs are shown as icons along the left

side of the screen. You can change the Main Menu to show tabs in a

text-only format.

Using the Main Menu

Use the Main Menu on your GPSMAP 378/478 to access various

waypoint, system, navigation and interface management, and setup

menus. Press the MENU key twice from any page to open the Main

Menu. For more information, see the “Main Menu” section on

page 67.

To view the Main Menu icons in text-only format:

1. Highlight the Display tab, and press ENTER.

2. Select the Main Menu ﬁeld. Press ENTER.

3. Highlight Text Only, and press ENTER.

Main Menu

Display Tab

To select a tab from the Main Menu:

1. From any page, press MENU twice to open the Main Menu.

2. Press up or down on the ROCKER to highlight a tab. The

information for the highlighted tab automatically appears

on the right. To highlight a sub tab, press left or right on the

ROCKER, and then press up and down to select individual

ﬁelds.

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GPS tab

Using Simulator Mode

Simulator Mode is great for practicing with the unit if you are

indoors or when satellite signals are not available. All waypoints and

routes created in Simulator Mode are retained in memory for future

use.

By unplugging the GXM 30 antenna and placing the unit in

Simulator Mode, you can view simulated weather information.

NOTE: Do not try to navigate using Simulator Mode. When the

unit is set to Simulator Mode, the GPS receiver is turned off.

Any satellite signal strength bars shown are only simulations and

do not represent the strength of actual satellite signals.

Starting Simulator Mode from the GPS tab

Entering a New Location

Use the GPS options menu to enter a new location from which to

simulate.

To turn on Simulator Mode:

1. Highlight the GPS tab on the Main Menu.

To enter a New Location using the map:

1. Highlight the GPS tab on the Main Menu.

2. Press MENU to open the GPS tab options menu.

3. Highlight Start Simulator, and press ENTER.

2. Press MENU to open the options menu.

3. Highlight New Location, and press ENTER.

4. Highlight Use Map, and press ENTER.

5. Use the ROCKER to move the panning arrow to the location

you want on the map, and press ENTER.

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MArIne Mode > MArIne Mode PAges

MarIne Mode

This section explains some of the more common operations you will perform with your GPSMAP 378/478.

To switch usage modes:

1. Press and hold the PAGE/MODE key. The Usage Mode Menu appears.

2. Use the ROCKER to select either Automotive or Marine, and press ENTER.

Marine Mode Pages

Marine Mode has ﬁve main pages: Map, Compass, Highway, Active Route, and Position Data. An optional XM Audio Page can be enabled.

An optional Sonar Page is available when a GSD 21 is connected. See the “Setting Up and Using Sonar” section beginning on page 103 for

more information.

Map Page

Compass Page

Highway Page

Active Route Page Position Data Page

XM Audio Page

(Optional)

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MArIne Mode > nAvIgAtIng to A destInAtIon

Navigate Options Menu

Press NAV to open the Navigate Menu.

Navigating to a Destination

You can navigate to your destination using the Map Page. As you

travel, you see a magenta line that always runs from your current

location to the destination or to the next turn on the Map Page. You

can use the Map Page, Compass Page, Highway Page, and Position

Data Page to help navigate.

You can navigate to a destination using one of the following

methods:

•

Select a point on the map and press NAV.

Navigate Menu in Marine Mode

Press NAV to start a new route using the Find Menu or start a

saved route or track.

Go To Point—allows you to select a waypoint or point of interest

from the Find Menu to which to navigate.

•

Press the FIND key to search for a particular item and create

a route to it.

Navigate Route—allows you to select a route to navigate. You can

also start a saved route through the Routes tab on the Main Menu.

For information about routes, see page 20.

Marine Mode and Automotive Mode are similar. Most of the

features discussed here also apply to Automotive Mode.

Navigate Track (TracBack)—allows you to select a saved track to

navigate. You can also start a saved track through the Track tab of

the Main Menu. For information about tracks, see page 34.

MOB (Man OverBoard)—creates a MOB waypoint and navigates

to that location. For more information about MOB, see page 16.

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MArIne Mode > nAvIgAtIng to A destInAtIon

To navigate (Go To) a point on the map:

1. On the Map Page, highlight a point to navigate to, and press

NAV.

To start a new route using the Find Menu:

1. Press the NAV key to open the Navigate Menu.

2. Highlight Go To Point (or New Route when in Automotive

Mode) and press ENTER to open the Find Menu.

2. Highlight Go To <point name>, and press ENTER.

3. From the Find Menu, highlight Waypoints and press ENTER.

4. Select a waypoint from the list, and press ENTER to open the

Waypoint Review Page.

Navigate Menu

3. Follow the magenta route created on the Map Page.

To stop navigation:

1. While navigating to a point, press NAV.

Waypoint Review Page

5. With the Go To button highlighted, press ENTER to begin

2. Highlight Stop Navigation, and press ENTER.

navigation.

3. Highlight Resume Navigation, and press ENTER to resume

navigation.

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MArIne Mode > nAvIgAtIng to A destInAtIon

To search for an item and route to it:

1. Press FIND to open the Find Menu.

Man OverBoard (MOB)

Use the MOB function to simultaneously mark your current location

and create a direct route back to that location for quick response to

emergency situations.

2. Highlight a category, and press ENTER.

3. Press ENTER and press the ROCKER up or down to enter

letters contained in the item name. Press ENTER when

ﬁnished.

To start the MOB function:

1. Press and hold the NAV/MOB key, or press the NAV/MOB

key twice.

Finding an item using the Containing ﬁeld: The unit searches for items

containing the letter combination you enter and shows them in the list.

2. Press ENTER to conﬁrm and begin navigating to the MOB

4. Highlight the item from the list, and press ENTER.

5. Press ENTER when the Go To button is highlighted.

location.

When a MOB is activated, a MOB waypoint with an international

MOB symbol is created, and the unit begins actively navigating to

that point. Use any of the navigation pages to guide you back to the

MOB point. The MOB waypoint is stored in the waypoint list and

can be deleted like any other waypoint.

For complete information about ﬁnding an item, see the “Finding an

Item ” section.

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MArIne Mode > fIndIng An IteM

Using the Find From Feature

Finding an Item

You can use the Find Menu to center your search around an item

you just found. For example, you search for Restricted Areas and the

search shows an “Anchoring Prohibited” search result. If you press

FIND again, you will see “From Anchoring Prohibited” as the new

search from point. You can also use the Find feature to center your

search from any waypoint, route list entry, map item, or tide station.

Use the Find Menu to easily search for addresses, food & drink, fuel

services, lodging, banks/ATMs, cities, shopping, stored waypoints

and points of interest (POIs). To open the Find Menu, press the

FIND key.

The Find Menu is comprised of several default categories:

Waypoints, Cities, Exits, Transportation, Tide Stations, and Weather

Data. Additional categories appear depending on the optional

BlueChart g2 or MapSource data card in the unit.

To ﬁnd an item from another location on the map:

Open the Map Page. Use the ROCKER to pan the arrow

(pointer) to the location you want, and press FIND. The Find

Menu opens, showing “From Map Pointer.” The list of items is

sorted to show items nearest the selected location.

2. Highlight a category from the list, and press ENTER.

3. Highlight an item from the list, and press ENTER. The item’s

Information Page automatically opens, allowing you to

save the item as a waypoint, show the item on the map, or

automatically create a route to (Go To) the item.

Find Menu

Follow the directions on page 15 to navigate a new route using the

Find Menu.

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MArIne Mode > fIndIng An IteM

To ﬁnd an item from another location:

1. From any page, press FIND.

To ﬁnd an item near another item:

1. Press FIND. The Find Menu opens.

2. Highlight a category from the list, and press ENTER.

3. Press MENU to open the options menu.

2. Highlight the item you want to “Find From.”

3. Press FIND. The Find Menu opens again with items near the

previously-selected item. Search for the item you want.

Viewing Recently Found Items

The Recently Found Page shows a list of the items you have

searched for or gone to recently.

To view recently found items:

1. Press FIND to open the Find Menu.

2. Highlight Recently Found, and press ENTER to open the list

Find From Options Menu

of recently found items.

3. Press MENU to show the options menu.

4. Highlight Near Other and press ENTER. If you are actively

following a route, you can also choose one of the other

options listed in the Find From list.

4. Select Show Find History to view the list of items you have

searched for recently.

5. Highlight Remove Point, and press ENTER to delete the

5. Select a reference location on the map, and press ENTER.

selected recently found point.

The list shows items nearest to the new map location.

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Viewing the Information Page

Each item on the map and each item listed in the results list has an

information page.

Find Menu Options

To view additional Find Menu options, press FIND, and then press

MENU. The following options are available:

•

Enable Auto Arrange—automatically arranges the Find

Menu. When selected, Disable Auto Arrange and Restore

Default options are available.

To view details about an item:

1. Highlight a point on the map or in the search results list, and

press ENTER.

An information page appears with details about the item, in

a tabbed format. Depending on the type of item, additional

options are available for viewing the item on the map,

viewing a tide chart, viewing the list of maps on your data

card, and viewing the next item in the search results list.

Near Other—select a new location from which to compile

the Find items lists. Using the ROCKER, move the map

arrow to the location you want, and press ENTER.

Map Information—shows information about the detailed

map data stored on the data card and allows you to select

which maps appear on the Map Page.

Additional selections are included in the options menu when you are

navigating:

•

Near Next—compiles the Find items lists based on the next

turn in the route.

Near Destination—compiles the Find items lists based on the

route destination.

Map Feature Information Page

Near Current Route—compiles the Find items lists based on

the active route.

2. Press PAGE or QUIT to exit the information page. You

can also highlight one of the on-screen buttons, and press

ENTER.

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5. Highlight OK, and press ENTER to add a route point.

Creating and Using Routes

The GPSMAP 378/478 allows you to create and store up to 50

reversible routes, with up to 300 points each.

6. Repeat step 5 to deﬁne additional route points.

To create a route using the map:

1. Highlight the Route tab on the Main Menu.

Creating a New Route

2. Press MENU to open the Route options menu.

3. Highlight New Route, and press ENTER.

4. Press MENU to open the options menu.

Use the Route tab to create a route by selecting waypoints from the

Find Menu, or by selecting waypoints or map items from the Map

Page.

5. Highlight Edit on Map, and press ENTER.

6. Highlight a location on the map, and press ENTER.

7. Repeat step 5 to deﬁne additional route points

To create a route using the Find Menu:

1. Highlight the Route tab on the Main Menu.

NOTE: If you select an area of the map that is not a

feature or waypoint, a new waypoint is created for that

location. Press ENTER on the New Waypoint Page to save

the location as a waypoint and continue adding points to

your route. You can edit the properties of this waypoint as

you can with any waypoint.

Route Tab with the Route List

2. Press MENU to open the Route options menu.

3. Highlight New Route, and press ENTER.

4. Press ENTER to ﬁnd items to add to the route.

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Navigating a Saved Route

Use the Navigate Route option to select and navigate a saved route.

Editing a Route

After you create a route, use the Route Review Page to edit, change

the name, and review route points of a selected route.

To navigate a saved route:

1. Press the NAV key.

To change the name of the route:

1. Highlight the Route tab on Main Menu.

2. Highlight Navigate Route, and press ENTER.

3. Highlight a route, and press ENTER.

2. Highlight the name of the route, and press ENTER.

3. With the Route Review Page open, highlight the route name

ﬁeld at the top of the page, and press ENTER.

Select a route

from list

Enter a new

Route name

here

Route Review Page

4. Use the ROCKER to enter the route name, and press

ENTER.

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To review individual route points:

1. Highlight the Route tab on the Main Menu.

To add points to the route:

1. Highlight the Route tab on the Main Menu.

2. From the Route List Page, highlight the name of the route,

2. Select a route, and press ENTER.

and press ENTER.

3. Highlight the spot in the route that you want to add the new

point. (The new point is added before the highlighted route

point).

3. From the Route Review Page, highlight a point, and press

ENTER.

4. On the Point Review Page, choose Next (highlight the next

point on the route list), Show Map (show the point on a map

window), or Save (save the point as a waypoint), and press

ENTER. If the route point is a user waypoint, you can edit

any of the waypoint properties on the Waypoint Page (see

the “Creating and Using Waypoints ” section beginning on

page 24 for details).

4. Press MENU.

5. Highlight Insert Waypoint, and press ENTER. The Find

Menu opens for you to search for and select the point you

want to add to the route.

When you return to the Route Review Page, the next point in the

route is automatically highlighted. You can review each point on the

route by pressing ENTER repeatedly.

Route Review Page

6. In the Point Review Page, highlight OK, and press ENTER to

add the new point to the route.

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To edit the route on the map:

1. Highlight the Route tab on the Main Menu.

To plan your route:

1. Open the Route Review Page options menu.

2. Select a route, and press ENTER. Press MENU to open the

2. Highlight Plan Route, and press ENTER.

Route Review Page options menu.

3. Highlight Edit on Map, and press ENTER.

4. Select a location on the route (the route turns red when the

arrow is over the route), and press ENTER.

5. Use the ROCKER to drag the route to the new point location,

and press ENTER.

Entering Speed and Fuel Flow for trip planning

3. Enter the data for Speed and Fuel Flow. You also can enter

the date and time of your departure. Press QUIT to return to

the Route Review Page.

NOTE: Fuel ﬂow rates are measured in “units per hour.” System

setting changes for units of measure (statute, nautical or metric)

do not affect the fuel ﬂow measure. You should enter fuel ﬂow

rates based on information for your vehicle/vessel (such as the

operator’s manual or performance speciﬁcations), and make note

of the units of measure (gallons or liters).

Editing the route on the map

6. If the New Waypoint Page opens, edit the waypoint as

needed, highlight OK, and press ENTER.

7. Repeat steps 4 through 6 until all points are added to the

route. Press QUIT when ﬁnished.

You can enter information about your trip so the GPSMAP 378/478

can estimate information about your trip.

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Manually Transitioning to the Next Waypoint

From the Route tab option menu, highlight Set Up Routes, and

press ENTER to set the route leg transition (or waypoint transition).

Select Distance to enter a radius so that when you are within the

entered distance, the GPSMAP 378/478 leads you to the next point

on your route.

Creating and Using Waypoints

Waypoints are locations or landmarks you record and store in your

GPS. They are locations you might want to return to later, such as

checkpoints on a route or signiﬁcant ground features. You can add

waypoints to routes and even create a Go To directly to the selected

waypoint.

When you select Manual, you can transition to the next waypoint

anytime while navigating a route. While you are navigating

the route, open the Active Route Page, and press MENU.

Highlight Next Route Waypoint, and press ENTER to have the

GPSMAP 378/478 start routing you to the next point in your route.

The GPSMAP 378/478 stores up to 3,000 alphanumeric waypoints

with a user-deﬁned icon, comment, elevation, depth, and

temperature available for each waypoint. You can create waypoints

using three basic methods:

•

ENTER/MARK—allows you to quickly mark your present

location.

Graphically—allows you to deﬁne a new waypoint location

from the map display using the ROCKER.

Text Entry—allows you to enter a new waypoint’s location

coordinates manually.

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Marking Your Present Location

Creating Waypoints Using the Map

Use the ENTER/MARK key to capture your present location to

create a new waypoint. You must have a valid position (2D or 3D)

ﬁx to mark your present location.

You can quickly create a waypoint using the Map Page. When

you pan the map and move the arrow over a map item, you see a

highlighted description of that item. The GPSMAP 378/478 uses the

map item text shown on the map as the default name and symbol for

the new waypoint.

To mark your present location:

1. Press and hold the ENTER/MARK key until the New

Waypoint Page opens, then release it. A default four-digit

name and symbol are assigned for the new waypoint.

To create a new waypoint using the Map Page:

1. Use the ROCKER to move the arrow to the map location or

map feature you want.

2. Press and quickly release ENTER/MARK to capture the

location of the arrow. Pressing and holding ENTER/MARK

marks your current location, not the arrow’s location.

If you have highlighted a map feature, an information page

opens after you press ENTER. Highlight Save, and press

ENTER to save the item as a waypoint. The New Map

Waypoint Page opens.

New Waypoint Page

3. To accept the waypoint with the default information, highlight

OK, and press ENTER.

2. To accept the waypoint with the default information, highlight

To change any information on the New Map Waypoint Page,

highlight the appropriate ﬁeld, and press ENTER. After

entering your changes, highlight OK, and press ENTER.

OK, and press ENTER.

To change any information on the New Waypoint Page,

highlight the appropriate ﬁeld, and press ENTER. After

entering and conﬁrming your changes, highlight OK, and

press ENTER.

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To change any of the other information on the New Map

Waypoint Page, highlight the appropriate ﬁeld, and press

ENTER. After entering your changes, highlight OK, and press

ENTER.

Creating a Waypoint by Entering Coordinates

You can manually enter location coordinates to create a waypoint.

This method is useful for creating a waypoint at a speciﬁc latitude/

longitude position from a chart.

Reviewing a Waypoint

To create a new waypoint by entering location

coordinates:

1. Press ENTER/MARK to create a waypoint. The new

waypoint is created with the next available waypoint number

and the receiver’s last know location as the default location.

After you create and store a waypoint, you can modify, review,

rename, move, or delete it at any time using the Waypoint Review

and Waypoint Edit Pages.

To access the Waypoint Review Page:

Highlight a waypoint on the Map Page, and then press

ENTER to open the Waypoint Review Page. If the waypoint

is located on a map feature or MapSource or BlueChart g2

feature, the Waypoint Review Page might include additional

tabs containing information about other features at that

location

2. On the New Map Waypoint Page, highlight the Location

ﬁeld, and press ENTER.

3. Use the ROCKER to enter location coordinates, and press

ENTER when ﬁnished.

Waypoint Review Page

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To access the Waypoint Edit Page:

1. Highlight the Points tab on the Main Menu, and then select a

waypoint from the list.

To add a waypoint to the end of the route:

1. Open the Waypoint Edit Page, and press MENU.

Waypoint Options Menu

Points Tab

2. Select Append To Route, and press ENTER. The Select

Route window opens.

2. Press ENTER to open the Waypoint Edit Page.

NOTE: If the waypoint is located on a map feature or

MapSource or BlueChart g2 feature, the Waypoint Edit Page will

not show the details of the other map features.

Adding a Waypoint to a Route

Use the Append to Route option to add the selected waypoint

to the end of a route. This option is available only when you are

not navigating. When you are navigating to a destination, Add to

Current Route opens. The selected waypoint is added to the current

route before the route destination.

3. Highlight a route or select New Route, and press ENTER.

4. Highlight OK, and press ENTER to save the waypoint.

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Averaging the Waypoint’s Location

Average Location makes the unit take several sample location

measurements for the waypoint and recalculate for a more accurate

location reading.

Projecting a Waypoint

You can create a new waypoint by projecting the distance and

bearing from a speciﬁc location to a new location.

To create a new waypoint by projecting its location:

1. Create a waypoint. The new waypoint uses the next available

waypoint number and the receiver’s last known location as

the default location.

NOTE: You must have a GPS satellite ﬁx before you can

average a waypoint’s location.

To calculate the average location:

1. Open the Waypoint Page, and press MENU.

2. Use the ROCKER to highlight Points from the vertical list of

tabs and select a waypoint. Press ENTER.

2. Select Average Location, and press ENTER. The Average

Location window opens. The ﬁelds change as the unit

calculates the average location of the waypoint.

3. Press MENU to open the New Waypoint Page options menu.

4. Highlight Project Location, and press ENTER.

Project Location Menu

Average Location Page

5. To change the location from which you are projecting the new

3. Press ENTER to save the location.

waypoint, highlight the From ﬁeld, and press ENTER.

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6. Select the point that you will project your new waypoint

from, just as you would select a waypoint or point of interest.

For more information see the “Finding an Item ” section on

page 17.

7. To adjust the distance that the new waypoint will be projected

beyond the original waypoint, highlight the Distance ﬁeld,

and press ENTER. Enter the projection distance, and press

ENTER.

User Points Tab

To adjust the bearing that the new waypoint will be projected

from the original waypoint, highlight the Bearing ﬁeld, and

press ENTER. Enter the bearing, and press ENTER.

To navigate (Go To) a waypoint from the Points tab:

1. Select the Points tab on the Main Menu, and then highlight

the User sub tab.

8. When you have adjusted all elements of the projected

location, highlight Save, and press ENTER.

2. Highlight the waypoint you want in the list.

9. Make any other changes to the new waypoint data (such as

the name or symbol); highlight OK, and press ENTER.

3. Press NAV to open the Navigate Menu. Highlight Go To

<Point Name>, and press ENTER.

Editing a Waypoint

To edit the waypoint:

1. Open the Waypoint Review Page or Waypoint Edit Page.

The User sub tab shows a master list of all waypoints stored in

memory. From the User list, you can review, edit, rename, or delete

individual waypoints or delete all user waypoints.

2. Highlight the waypoint name, symbol, or ﬁeld you want to

change, and press ENTER.

The number of stored and available waypoints is shown at the

bottom of the User sub tab. Stored waypoints are arranged in

alphanumeric order.

3. Use the ROCKER to select a symbol or enter data, and

press ENTER when ﬁnished.

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To create a waypoint category:

1. From any of the waypoint pages or the Points tab, press

MENU to open the options menu.

Symbol ﬁeld

Name ﬁeld

2. Select Edit Categories, and press ENTER.

3. Highlight Add, and press ENTER.

Waypoint Page

To edit the next waypoint in the list:

1. Highlight Next, and press ENTER. The Waypoint list appears

with the next waypoint highlighted.

2. Press ENTER to edit that waypoint.

Entering a new category

Organizing Waypoints into Categories

4. Use the ROCKER to enter a name for the category.

5. Highlight Save, and press ENTER.

You can organize your waypoints into categories, to help manage

your waypoints. For example, you can create a Vacation category

that stores all of the waypoints you will use for your vacation.

When the vacation is over, you can delete all the waypoints in that

category. You can create up to 15 categories.

To assign a category to a waypoint:

1. Open the Waypoint Edit Page. (You can also change the

category on the New Waypoint Page.)

2. Select the Category ﬁeld, and press ENTER.

3. Select the category to which you want to assign the

waypoint, and press ENTER.

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Deleting Waypoints

Select the

category to

which you want

to assign this

waypoint.

You can delete waypoints from the waypoint list on the Points tab

or from the Waypoint Page. To delete a waypoint from the Waypoint

Page, use the ROCKER to highlight the on-screen Delete button,

and press ENTER.

NOTE: When a waypoint is deleted from the list, it cannot

be recovered from the unit. Backup important waypoints to a

computer using the optional PC cable and interface software,

such as MapSource, or write them down by hand.

Waypoint Page

To delete a category:

To delete a waypoint from the User Points tab:

1. From the Points tab, highlight the waypoint you want to

delete.

1. With the Waypoint Categories window open, highlight the

category you want to delete, and press MENU.

2. Press MENU, highlight Delete Waypoint, and press ENTER.

A conﬁrmation message appears.

Waypoint Categories Options Menu

2. Select Delete Category, and press ENTER.

3. Press ENTER again to ﬁnish deleting the category.

3. Press ENTER to conﬁrm.

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To delete waypoints by symbol or category:

1. On the User sub tab, highlight the waypoint to delete, and

press MENU.

Proximity Points

Use the Proximity Points tab to deﬁne an alarm circle around a

stored waypoint location. The alarm circle can help you avoid reefs,

rocks, or restricted waters. Up to 100 waypoints can be listed with

a maximum alarm radius of 99.99 nautical miles, statute miles, or

kilometers.

2. Highlight Delete by Symbol or Delete by Category, and

press ENTER.

3. When deleting by symbol, highlight the symbol of the

waypoint you want to delete, and press ENTER. When

deleting by category, select the category you want to delete

from the list, and press ENTER.

If a proximity alarm circle overlaps an existing alarm circle, a

“Proximity Overlaps Another Proximity Waypoint” message

appears. Because the unit only alerts for one of the overlap points,

use caution when navigating in these areas. If you enter an alarm

circle overlap, you are only alerted to the closest proximity

waypoint.

4. Highlight OK, and press ENTER to conﬁrm. Choose Cancel

or press QUIT to exit without deleting the waypoint.

To delete waypoints by distance:

1. On the User sub tab, highlight the waypoint to be deleted,

and press MENU.

To turn proximity alarms on or off:

1. Highlight the Points tab on the Main Menu, and then select

the Proximity sub tab.

2. Highlight Delete By Distance, and press ENTER.

3. Select Less Than or More Than and enter the distance

using the ROCKER.

4. You can select a waypoint or point of interest as the From

location. Highlight the From ﬁeld and press ENTER. From

the Find Menu, select a location and press ENTER. When

OK is highlighted, press ENTER.

5. Highlight Delete and press ENTER to delete all waypoints

within the set location. Choose Cancel or press QUIT to exit

without deleting the waypoints.

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2. Highlight the ﬁeld below Proximity Alarm, and press

ENTER.

To clear one or all proximity waypoints from the list:

1. Highlight the Points tab on the Main Menu, and then select

the Proximity sub tab.

3. Select the On or Off setting, and press ENTER.

2. Highlight the proximity waypoint to clear, and press MENU.

To add a proximity waypoint:

1. From the Proximity Points tab, use the ROCKER to highlight

an empty line on the Proximity list, and press ENTER. The

Find Menu opens.

2. Select a waypoint or point of interest from the Find Menu.

3. With OK highlighted, press ENTER to select the point.

4. Use the ROCKER to enter a distance value (up to 99.99

units), and press ENTER.

Proximity Points Tab Options Menu

3. To clear a single alarm, highlight Remove Point, and press

ENTER. To clear all proximity waypoints, select Remove All,

and press ENTER.

4. Highlight OK, and press ENTER to conﬁrm.

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Managing Your Tracks

The GPSMAP 378/478 draws an electronic breadcrumb trail or

track log on the Map Page as you travel. The track log contains

points along its path, including time, and location for each point.

The track log starts recording as soon as the GPSMAP 378/478 gets

a location ﬁx. For the best results, clear the track log before you

start traveling because when the track log is full, new track points

overwrite the oldest track points.

Active Track Tab

The percentage of memory used by the current track log appears at

the top of the Active tab. After the track log is cleared, it shows zero

percent. When the track log reaches 100%, the most recent track

points start to overwrite the oldest track points (if Wrap is selected

for Record Mode). To avoid losing track points, save the track log

when it approaches the 99% mark.

Record Mode—Wrap records over the oldest tracks when the track

log reaches 100%. Fill records a track log until the track log is full

(100%). When Off is selected, the unit does not record tracks.

Interval—Distance records track points after a speciﬁed distance is

traveled. Time creates track points after a speciﬁed time has elapsed.

Resolution records track points based on the resolution. The higher

the resolution entered, the more points the unit creates to make the

track.

Setting Up and Saving Your Tracks

You must save the track log before you can use the Navigate Track

feature. The Save feature allows you to store up to 15 track logs

from certain times and dates.

Color—select a color for the track when it appears on the map.

Value—records a track according to the Interval and Value. Enter a

To access the Track tab:

1. Press MENU twice to open the Main Menu.

speciﬁc distance, time, or resolution.

2. Highlight the Track tab.

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To clear the track log:

1. Highlight the Track tab on the Main Menu, then highlight the

To save a portion of the track log:

1. Highlight the Track tab on the Main Menu, and then highlight

Active sub tab.

the Active sub tab.

2. Highlight the Clear button, and press ENTER. A conﬁrmation

2. Select Save, and press ENTER.

message appears.

3. Highlight No, and press ENTER when a message appears.

4. Select a beginning point, and press ENTER.

Clearing the Track Log

Saving a Portion of the Track Log

3. Highlight OK, and press ENTER.

5. Select an ending point, and press ENTER.

To save the entire track log:

1. Highlight the Track tab on the Main Menu, and then highlight

6. Highlight OK, and press ENTER to save the track.

the Active sub tab.

2. Select Save, and press ENTER. A message appears asking

if you want to save the entire track.

3. Highlight Yes, and press ENTER.

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To edit a track:

1. Highlight the Track tab on the Main Menu, and then select

Saved Tracks

The Saved sub tab lists all of the saved tracks in your unit. Press

MENU to open the Saved tab options menu.

the Saved sub tab.

2. Select a track to edit, and press ENTER.

Saved Tab

3. Highlight the Name ﬁeld, and press ENTER. Use the

ROCKER to change the name, and press ENTER.

•

Review on Map—shows the highlighted track on the Map Page.

TracBack—navigates the track. You can either navigate the

track as it is saved, or you can navigate the track in reverse.

4. Select a different display color to show the track on the map.

5. Highlight the box next to Show on Map, and press ENTER.

6. To begin a TracBack, highlight TracBack, and press ENTER.

•

Delete Track—erases the highlighted track from the unit’s

memory.

7. To view the track on the map, highlight Map, and press

ENTER. Press QUIT to return to the Track tab.

Delete All—erases all tracks from the unit’s memory.

8. Highlight OK, and press ENTER to save your changes.

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Navigating a Saved Track

TracBack Tips

You can save your track log to use later as a TracBack, which

reduces your track log into a route with up to 300 turns. When

initiated, a TracBack route leads you back to the oldest stored track

log point. It is a good idea to clear the existing track log before you

start your current trip. Also, you must save an active track log before

you can navigate it as a TracBack.

When a TracBack is initiated, the GPSMAP 378/478 divides the

track into segments called legs. Up to 300 temporary turns are

created to mark the most signiﬁcant features of the track in order to

duplicate your exact path as closely as possible. To get the most out

of the TracBack feature, remember these tips:

•

Always clear the track log at the point that which you want to

go back (such as a dock or campsite).

To start a TracBack using the NAV key:

1. Press NAV, highlight Navigate Track, and press ENTER.

The Record Mode option on the Active Track tab must be set

to Fill or Wrap.

2. Highlight the track you want to navigate, and press ENTER.

If the track log Interval option on the Active tab is set to the

Time option, the route might not navigate your exact path

(keep the interval set to Resolution for best performance).

•

If the receiver is turned off or satellite coverage is lost during

your trip, TracBack draws a straight line between any point

where coverage was lost and where it resumed.

If the changes in distance and direction of your track are too

complex, 300 waypoints might not mark your path accurately.

The receiver then uses the most signiﬁcant points of your

track so there will be fewer changes in direction.

Selecting a Saved Track

3. Select the point you want to navigate to (TracBack to), and

press ENTER.

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MArIne Mode PAges > MAP PAge

The system has built-in BlueChart g2 charts. Optional Garmin data

cards and MapSource CD-ROMs enhance the versatility of your

GPSMAP 378/478. With optional MapSource information and

BlueChart g2 you can view information for outside the US that is

not already preloaded.

MarIne Mode PaGeS

Five pages are available in Marine Mode—Map, Compass,

Highway, Active Route, and Position Data. An optional XM Audio

Page can be enabled. A Sonar Page is available when a GSD 21

Sounder Module is connected.

In Marine Mode, by default, ﬁve user-selectable data ﬁelds appear

on the right side of the screen that can be conﬁgured to show any

one of the possible data options. You can also add additional data

ﬁelds to the page or select a full screen map without data ﬁelds.

Map Page

When you turn on the GPSMAP 378/478, the Map Pages appears

after the unit acquires a satellite signal. The position marker (

shows your current location on the map.

)

The Map Page shows map information (digital cartography) that

includes navaids, lakes, rivers, coastlines, cities, and highways. Use

the dedicated zoom keys (IN and OUT) to adjust the Map Page

scale.

Data ﬁelds

Current

locatꢀon

Two map operating modes, Position Mode and Pan Mode, determine

what cartography is shown on the map display. Position Mode

pans the map to keep your present location in the display area.

The position marker ( ) shows your travel on the Map Page. The

GPSMAP 378/478 always turns on in Position Mode, with the last

known location centered on the map. When you press the ROCKER,

the GPSMAP 378/478 enters Pan Mode, which moves the map to

keep the white arrow (map pointer) within the display area.

Map scale

Map Page

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To change a data ﬁeld display:

1. Press MENU to open the options menu.

Changing the Page Layout and Data Fields

You can adjust how the following pages appear: Map, Compass,

Highway, Position Data, Trip Computer, and optional Sonar Pages.

You can also adjust the data ﬁelds on each page.

2. Highlight Change Data Fields, and press ENTER.

3. Highlight the data ﬁeld to change, and press ENTER.

4. Highlight the type of data you want to show, and press

To change the map page layout:

1. Press MENU to open the options menu.

ENTER.

2. Highlight Set Up Page Layout, and press ENTER.

Changing a Data Field

Selecting the Page Layout

5. Press QUIT to exit.

3. Select a page layout option, and press ENTER.

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Setting Up the Map Page

Use the Set Up Map option to adjust how items appear on the Map

Viewing Additional Map Data

Use the Map Information Page to view the data currently loaded on

Page.

your GPSMAP 378/478 unit and data card.

To change a map setup option:

1. On the Map Page, press MENU to open the options menu.

To review/change map information:

1. On the Map Page, press MENU.

2. Highlight Set Up Map, and press ENTER.

2. Highlight Map Information, and press ENTER. The ﬁrst

page shows the map families stored on the data card and

unit and whether they are shown on the Map Page.

Map Family

highlighted.

Press ENTER

to vꢀew the

ꢀndꢀvꢀdual maps

in the family.

Setting up the Map Page

3. Press left or right on the ROCKER to highlight a tab; press

up or down on the ROCKER to highlight the ﬁeld you want to

change, and press ENTER.

3. To change the setting for a map family, highlight the box next

to the map family name, and press ENTER to select (check

mark) or deselect (no check mark) the Show setting.

4. Highlight a setting, and press ENTER.

5. Press PAGE or QUIT to exit.

NOTE: The outline of a check mark will appear if one or more

maps have been deselected within that map family.

4. To view the list of maps within a map family, highlight the

name of the map family, and press ENTER.

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5. When using a map loaded to a data card, you can view

detailed information about an individual map, highlight the

Map Name, and press ENTER. Highlight OK, and press

ENTER to exit the Map Information Page.

Map Orientation

There are three map orientation options: North Up orients the map

like a paper map. Track Up orients the map in the direction of travel.

Course Up orients the map so the direction of navigation is always

up. When using Track Up or Course Up, the north arrow indicates

the orientation. To change the map orientation, press MENU to open

the Map Page. Press MENU again. Select Set Up Map, and press

ENTER.

Zooming In and Out of the Map

The map has 28 available map zoom ranges ranging from 20 ft to

800 nm (20 ft to 800 mi or 5 m to 1200 km). The map zoom range is

controlled by the IN and OUT keys, with the current range shown at

the bottom right of the data window.

6. To select/deselect individual maps (data card maps only) to

be shown on the Map Page, highlight the box next to the map

you want, and press ENTER to check/uncheck the Show

box.

NOTE: The range value represents the distance from one end of

the range bar (

) to the other.

Press MENU, select one of the options (Show All, Hide All,

or Show Defaults), and press ENTER.

To select a map zoom range (zoom in and out):

Press the OUT key to zoom out; press the IN key to zoom in.

7. Press QUIT to exit the Map Information Page.

Both the GPSMAP 378 and GPSMAP 478 have a built-in worldwide

land database. The GPSMAP 378 contains detailed maps of the US

inland lakes and the GPSMAP 478 contains built-in BlueChart g2

charts. The GPSMAP 378/478 shows cartography as long as chart

information is available for the map zoom range you selected.

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Map coverage conforms to the following conditions:

Panning the Map

Use the panning arrow to pan the map to view other map areas.

As you pan past the edge of the current map display, the screen

moves to provide continuous map coverage. The position icon

stays in your present location and might not be visible on the screen

when you pan the map.

•

Cartography is shown when the selected zoom range is

covered by either the internal basemap or other MapSource

data loaded onto a data card.

When the selected zoom range is covered by both the internal

database and data card map information, the cartography with

the best resolution appears.

To pan the map:

Press up, down, right, or left on the ROCKER. The panning

arrow moves the map so you can view different parts of the

map.

When the selected zoom range exceeds the resolution of the

data in use, “overzoom” appears below the map scale.

No addꢀtꢀonal data ꢀs avaꢀlable

•

When external data (such as MapSource data) is used, “detail

map” appears below the map zoom range.

Map feature

highlighted

Using external detailed maps

As you move the arrow, the distance and bearing from your present

location to the arrow appears in the data window, along with the

arrow’s position coordinates. When you zoom in Pan Mode, the

arrow stays centered on the screen. When the arrow is stationary,

ﬁxed coordinates appear in the position ﬁeld, and the distance and

bearing from your present location update as you move.

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3. Use the ROCKER to highlight the extra tabs and view the

To re-center your position on the screen:

information.

Press QUIT. The map automatically moves to show your

present location, and the unit returns to Position Mode.

4. Select an on-screen button and press ENTER. Press QUIT to

exit the information page.

You can also use the arrow to select on-screen map items, which

allows you to review a selected item directly from the map.

To view details about an on-screen point:

1. Use the ROCKER to move the arrow to a waypoint or map

item. If several items are grouped closely together, zoom in

closer for a better view.

When a waypoint or map item is selected, it is highlighted on-

screen with the name and location shown at the top of the

screen, along with the distance and bearing from your current

location.

Map Feature Information Page

2. Press ENTER to view more information about the point. The

information and on-screen buttons shown vary depending

on the type of item selected. In some cases, additional

information tabs appear at the top of the information page or

Waypoint Page.

Clearing Unwanted Details from the Map

You can remove items from the Map Page (declutter the screen) to

remove unwanted items:

To declutter the Map Page:

1. On the Map Page, press MENU to open the options menu.

2. Highlight Declutter, and press ENTER.

3. Press ENTER again to restore the detail to the map.

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4. Move the arrow to the point want to measure to. The bearing

and distance from the reference point and arrow coordinates

appear in the data window at the top of the display.

Measuring Distance

You can measure the distance and bearing between two map items.

To measure the bearing/distance between two points:

1. On the Map Page, press MENU to open the options menu.

End point of

measurement,

labeled ENT

2. Highlight Measure Distance, and press ENTER. An on-

screen arrow appears on the map at your present location

with ENT REF below it.

Push pꢀn

indicating the

beginning

REF

point of the

measurement

Measure Distance

3. Move the arrow to the reference point (the starting point that

you want to measure from), and press ENTER. A push pin

icon marks the starting point.

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If the arrow points up, you are going directly to the waypoint. If the

arrow points any direction other than up, turn toward the arrow until

it points up, and then continue in that direction.

Compass Page

During active navigation, the Compass Page guides you to your

destination with a graphic compass and a bearing pointer. When

the pointer is pointing straight up, you are heading directly to your

destination.

NOTE: You must be moving for the compass to accurately

update and show your heading.

Course to steer

ꢀndꢀcator

Rotating

compass ring

Turning On the Compass Page

The Compass Page is on by default in Marine Mode but off by

default in Automotive Mode.

Compass arrow

Data ﬁelds

To show the Compass Page in Automotive Mode:

1. Highlight the Display tab on the Main Menu.

2. Highlight the Compass Page ﬁeld, and press ENTER.

3. Select On, and press ENTER.

Compass Page in Marine Mode

The middle of the page features a rotating compass ring that shows

your course over ground (track) while you are moving. Your present

course over ground is indicated at the top of the compass ring. The

direction of the destination (bearing) relative to the course over

ground is indicated by an arrow in the middle of the compass ring,

and a course to steer indicator on the outside of the compass ring.

The course to steer represents the direction to steer to get back to the

course line.

Turning on the Compass Page

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Compass Page Options

Use the options menu on the Compass Page to customize the

Compass Page. For deﬁnitions of data ﬁeld options, see to page 132.

Using the Marine Timer

The Marine Timer, speciﬁcally designed for sail boat racing, allows

you to easily count up or down by speciﬁed time increments. As

is common in sail boat racing, there is often a 5-minute warning

countdown, followed by a 4-minute preparation countdown, and

ﬁnally a 1-minute ﬁnal countdown. Then during the race, mariners

might want to count up to keep track of their time.

Press MENU to open the Compass Page options menu.

You can use your GPSMAP 378/478 to perform each of these

different countdowns.

To open the Marine Timer:

1. Press MENU on the Compass Page.

2. Highlight Set Up Page Layout, and press ENTER.

Set Up Page Layout—select the page layout.

3. Highlight 2 Columns With Timer, and press ENTER. The

Marine Timer appears in the lower-right corner.

Show Course Pointer/Show Compass—toggles between showing

the course pointer, which shows how far off you are from your

course and how to get back on course, or shows the compass arrow.

The course pointer is also referred to as a CDI or course deviation

indictor.

Show (Hide) Bug Indicator—shows the course to steer bug

indicator (the purple tick mark on the compass ring).

Change Data Fields—changes on-screen data ﬁelds.

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To use the Marine Timer:

1. Press the ROCKER up or down to select the time you want

To set the Marine Timer:

1. Highlight the Setup tab on Main Menu, and then select the

to count. Five (5) minutes is the default.

Timers sub tab.

2. Press ENTER to start the timer. Use the ROCKER during the

2. Highlight Stop next to Marine to change the timer’s behavior.

timing to quickly select a different length of time.

3. Press ENTER to stop timing.

3. Highlight the time ﬁeld, press ENTER, and then use the

ROCKER to enter a new time.

Marine Timer on the Compass Page

As discussed previously, the timer is set to count down ﬁve minutes.

If you want to change the length of time and the behavior of the

timer, open the Timers Setup tab on the Main Menu.

NOTE: You can set the timer countdown for up to 60 minutes.

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MArIne Mode PAges > hIghWAy PAge

To hide/show the Highway Page:

1. Highlight the Display tab on the Main Menu.

Highway Page

The Highway Page is available in both Marine Mode and

Automotive Mode.

2. Highlight the Highway Page ﬁeld, and press ENTER.

3. Select Off to hide or On to show, and press ENTER.

Using the Highway Page

To stay on course, steer toward the violet bar (or arrows) until

it lines up with the red bar in the middle. The bottom section of

the screen provides visual guidance to the waypoint on a graphic

highway display. The line down the center of the highway represents

your desired track line.

As you head toward your destination, the highway perspective

moves to indicate your progress to the waypoint and which direction

you should steer to stay on course. If you are navigating a route, the

Highway Page shows each route waypoint in sequence connected

by a black “road” with a white line down the middle, which is your

desired track line. Nearby waypoints not in the active route can also

be shown. You can zoom in or out to show a larger or smaller view

of the highway.

Highway Page

When you are navigating, the Highway Page provides digital and

graphic steering guidance to the destination. The right side of the

Highway Page features user-selectable data ﬁelds showing useful

navigation information. A compass ribbon appears at the top of the

page to show your current heading, represented by the violet bar.

The red vertical bar represents the bearing to your course. To stay

on course, steer toward the red vertical indicator (or arrows) until it

lines up with the violet bar in the middle. The bottom of the screen

provides visual guidance to the waypoint on a graphic highway

display. The line down the center of the highway represents your

desired track line.

To change the highway perspective scale:

Press IN to zoom in; press OUT to zoom out.

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The following options are available from the Highway Page options

menu:

Highway Page Options

Use the Highway Page options menu to deﬁne the data ﬁelds and

select which waypoints and tracks appear on the screen. The data

ﬁelds, located along the right side of the page, provide various types

of useful data.

Set Up Page Layout—select the page layout.

Change Data Fields—change on-screen data ﬁelds.

Set Up Highway—shows an options menu with two sub tabs:

Line and Waypoint. Each tab has on/off settings for options,

including enabling the line for the Active Leg and Track Log.

To show and select the Highway Page options:

1. Press PAGE repeatedly until the Highway Page appears.

2. Press MENU.

3. Highlight an option, and press ENTER.

Set Up Highway

Highway Page Options Menu

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Active Route Page Options

Press MENU to open the Active Route Page options menu.

Active Route Page

When you are navigating a route using your GPSMAP 378/478,

the Active Route Page shows each point (waypoint or map item) of

the active route, with the point name, course, distance, and several

other ﬁelds of information. The current destination point, the active

point, is marked with an arrow icon. As you navigate a route, the list

automatically updates to indicate the next active point. The Active

Route and Route Review Pages share many of the same features and

options.

Deactivate—stop route navigation.

Edit on Map—edit the route on the map.

Add Waypoint—insert a point before the highlighted waypoint or

add a point to the end of the route.

Remove Waypoint—delete the selected waypoint from the route.

Invert—reverse the order of the route.

Active Route Page

Plan Route—enter information about your route to more accurately

provide you with arrival times.

Change Data Fields—customize the data ﬁelds shown on the

Active Route Page.

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Position Data Page Options

Press MENU to open the Position Data Page options menu.

Position Data Page

The Position Data Page shows important navigation data while

navigating a route in Marine Mode. By default, the Position Data

Page shows a compass ribbon, your current latitude and longitude,

date and time, your location in relation to a prominent nearby

landmark such as a waypoint or city, and eight user-selectable data

ﬁelds. The compass ribbon appears at the top of the page to show

your current heading with a red, vertical bar. To stay on course, steer

toward the violet bar (or arrows) until it is aligned with the red bar.

Change Nearest Type—specify the type of item used as the nearest

item (shown in the lower-left data ﬁeld). The choices vary based on

the current usage mode.

Your present locatꢀon

is 4.9 nm west of

Waypoint 0001.

Reset Trip—clear trip information, except the maximum speed and

the odometer.

Reset Max Speed—clear the maximum speed.

Position Data Page

Reset Odometer—clear the running total of the distance traveled

since the odometer was last reset.

Reset All—clear all trip information including the maximum speed

and odometer.

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MArIne Mode PAges > XM AudIo PAge

The XM Audio page is available in both Marine Mode and

Automotive Mode. The XM tab appears on the Main Menu, even if

the XM Audio Page is turned off.

XM Audio Page

Use the XM Audio Page to view and select XM Radio channels.

Add or remove channels within the Favorites category, and turn

audio on or off.

The XM Audio Page is divided into three panes. The ﬁrst pane

contains a list of XM Radio categories into which XM Radio

channels are grouped (Classical, Decades, Trafﬁc, and so on). For

a complete list of available categories and channels, visit the XM

Radio web site at www.xmradio.com. Select All Channels to view

a list of all channels in numerical order. You can also view a list of

your favorite channels.

NOTE: You MUST have a GXM 30 antenna connected to your

GPSMAP 378/478 and a subscription to XM Radio to use XM

Radio features. Additionally, you must use the external speaker

with 12/24-Volt adapter, third-party FM modulator, speakers, or

have headphones plugged in to hear the audio.

Category

The second pane shows a list of channels in the selected category.

Each channel has a description and the artist currently playing. You

can adjust this setting to show the song title instead of the artist.

name

Channels

Artꢀst name

The third pane shows the song and artist or program name, the

channel number and name, and the strength of the XM Radio signal.

Song title

Signal

strength

ꢀndꢀcator

Channel

number

XM Audio Page

Channel

name

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Turning on the XM Audio Page

The XM Audio Page is off by default.

XM Audio Page Options

With the XM Audio Page open, press MENU to open the options

menu.

To show the XM Audio Page:

1. Highlight the Display tab on the Main Menu.

2. Highlight the XM Audio Page ﬁeld, and press ENTER.

3. Select On, and press ENTER.

XM Audio Page Options Menu

The following options are available on the XM Audio Page options

menu:

XM Audio Page Field on the Display Tab

Add to Favorites—allows you to add channels to the Favorites

category.

To select an XM Radio channel:

1. Press up or down on the ROCKER to scroll through the list of

channels.

Scan—enables you to scan all channels, scan by category, or scan

favorites. Each channel plays for ﬁve seconds before advancing to

the next channel in the list.

2. Highlight the channel you want, and then press ENTER.

A triangle ( ) appears to the left of the channel currently

playing.

Display Artist (Display Song) In List—enables you to select

whether to show the artist or the song title in the channel list.

Mute (Enable) Audio Output—enables you to turn audio output on

or off.

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3. Highlight the channel you want to select from your list of

favorites, and press ENTER. A triangle appears to the left of

the newly selected channel.

Using Favorites

You can create a customized list of up to 30 of your favorite XM

Radio channels.

Selected

channel

To add a channel to Favorites:

1. Highlight the Category list, and press ENTER.

2. Select a category, and press ENTER, or use the IN and OUT

keys.

3. Select a channel.

4. Press MENU.

5. Highlight Add To Favorites, and press ENTER. Repeat

Favorites List

steps 1 through 4 to add another channel.

To delete a channel from Favorites:

1. In the Favorites category, highlight the channel you want to

delete, and press MENU.

2. Highlight Delete Favorite to delete the selected channel from

your favorites list, or highlight Delete All Favorites to delete

all channels from your Favorites list.

3. Press ENTER. A conﬁrmation message appears.

4. Highlight OK, and press ENTER again to conﬁrm.

Adding a Channel to Favorites

To view and select Favorites:

1. Highlight the Category list, and press ENTER.

2. Select the Favorites category, and press ENTER.

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Scanning XM Radio Channels

Turning Audio On or Off

From the XM Audio Page, you can scan all channels, scan channels

in a speciﬁc category, or scan channels in your Favorites.

To turn audio on or off:

1. On the Audio sub tab, press MENU.

2. Highlight Mute Audio Output on the options menu to turn

the audio off. A music note with a red slash appears in the

song pane. Highlight Enable Audio Output to resume audio

output.

To scan XM Radio channels:

1. On the XM Audio Page, press MENU.

2. Select Scan on the options menu, and press ENTER.

3. Select All Channels to scan all channels.

Audꢀo output ꢀs muted

Select Category to scan only channels in the selected

category.

Select Favorites to scan only channels in your Favorites list.

4. Press ENTER. Each channel is played for ﬁve seconds and

then advances to the next channel.

5. Press any key to stop scanning and select the current

channel.

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AutoMotIve Mode > AutoMotIve Mode PAges

autoMotIve Mode

This section discusses some of the more common Automotive operations you will perform with your GPSMAP 378/478 in Automotive

Mode. Please note that many common operations, such as marking a waypoint and creating a route, are performed the same way as in Marine

Mode. See the Marine Mode sections for operations and information not found in this section.

Automotive Mode Pages

Automotive Mode has two main pages (Map and Trip Computer) that are always available. Optional Highway, Compass, and XM Audio

Pages can be turned on in Automotive Mode. When you are actively navigating, the Current Route Page is available if you are navigating a

turn-by-turn route. The Active Route Page is available if you are navigating off road.

Map Page

Optional Compass Optional Highway

Page (see page 45) Page (see page 48)

Current Route Page Trip Computer Page Optional XM Audio

Page (see page 52)

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AutoMotIve Mode > nAvIgAtIng In AutoMotIve Mode

Navigate Options Menu

Press NAV to open the Navigate Menu.

Navigating in Automotive Mode

You can navigate to your destination in Automotive Mode using

the Map Page. As you travel, your GPSMAP 378/478 guides you to

your destination with voice prompts, arrows, and directions along

the top of the screen. When you are actively navigating, you see

a magenta line that always runs from your current location to the

destination or to the next turn on the Map Page. You can use the

Map Page, Compass Page or Highway Page to help navigate.

You can navigate to a destination using one of the following

methods:

Navigate Menu

•

Select a point on the map, and press the NAV key.

Go To Point—select a waypoint or another point from the Find

Menu to which to navigate.

Press the NAV key to navigate a new route using the Find

Menu, or start a saved route or track.

New Route—create a new route.

•

Press the FIND key to search for a particular item and create

a route to it.

Custom Avoids—set up roads to avoid when navigating.

Detour—create a detour route while navigating.

Edit Vias—add points through which you want to travel when

navigating.

Navigate Route—select a route to navigate.

Navigate Track (TracBack)—select a saved track to navigate.

Stop (Resume) Navigation—start or stop navigating.

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AutoMotIve Mode > nAvIgAtIng In AutoMotIve Mode

To navigate (Go To) a point on the map:

1. Highlight a point to navigate to, and press NAV.

Stopping and Resuming Navigation

When navigating to a point, you can stop navigation. For example,

if you are on a long car trip, but you want to stop for dinner, you can

stop navigation and resume after dinner.

2. Highlight Go To <point name>, and press ENTER.

3. Follow the magenta line created on the Map Page.

To stop navigation:

1. While navigating to a point, press NAV.

Navigate Menu

2. Highlight Stop Navigation, and press ENTER.

3. Highlight Resume Navigation, and press ENTER.

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AutoMotIve Mode > nAvIgAtIng In AutoMotIve Mode

To create a new route:

1. Press NAV to open the Navigate Menu.

To go to a destination using the Find Menu:

1. Press FIND to open the Find Menu.

2. Highlight New Route, and press ENTER.

2. Highlight a category, and press ENTER.

3. From the Find Menu, highlight Waypoints, and press

ENTER. (You can also choose to go to other points, such as

Cities or Exits from this list. The steps vary only slightly from

those listed for waypoints.)

3. Press ENTER, and use the ROCKER to begin entering the

letters contained in the item name. The list begins to sort by

the items which contain the letters you are entering. Press

ENTER when ﬁnished.

4. Select a waypoint from the list, and press ENTER to open the

Waypoint Review Page.

4. Highlight the item you want from the list, and press ENTER.

5. Highlight the Go To button, and press ENTER.

Waypoint Review Page

For complete information about ﬁnding an item, see the “Finding an

Activating a Go To using the Find Menu

Item ” section on page 17.

5. Highlight the Go To button, and press ENTER to begin

navigation.

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AutoMotIve Mode > edItIng your route

Following a Saved Route

Editing Your Route

Use the Navigate Menu to follow a saved track or route. If you

want to follow roads on your route, press MENU and select Follow

Roads on the Active Route Page.

When you are navigating a route, you can edit that route. You can

add areas and roads to avoid as well as temporary detours to your

current route. You can also add stops along your trip, called Via

Points.

To follow a saved route:

1. Press NAV to open the Navigate Menu.

While navigating, press NAV to open the Navigate Menu.

2. Highlight Navigate Route, and press ENTER.

3. Highlight the route you want to navigate, and press ENTER.

4. Press MENU to open the options menu.

5. Highlight Follow Roads, and press ENTER to create a

turn-by-turn route (auto-route), which appears on the Current

Route Page.

You can also initiate a saved route from the Route tab on the Main

Menu.

Navigate Menu in Automotive Mode

While navigating a course

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AutoMotIve Mode > edItIng your route

Entering Custom Avoids

Creating a Detour

The Custom Avoids feature allows you to enter speciﬁc areas and

roads to avoid when navigating. Custom Avoids apply to all routes,

but detours apply to only the active route. You can add Custom

Avoids while you are navigating a route or before you navigate.

If there is road construction or some other form of a detour while

navigating a route, you can have your GPSMAP 378/478 create a

detour route for you.

To create a detour:

1. While navigating a course, press NAV.

To enter a custom avoid:

1. Press NAV while navigating to a destination.

2. Select Detour from the Navigate Menu.

Open the Map Page, and press MENU.

2. Select Custom Avoids, and press ENTER.

3. Press ENTER when the Add Avoid button is highlighted.

4. Select Avoid Road or Avoid Area, and press ENTER.

5. Use the ROCKER to move the arrow to the ﬁrst point in the

avoidance area. Press ENTER to select the ﬁrst point.

6. Move the arrow to the end point, and press ENTER. During

route calculation and navigation, the GPSMAP 378/478 will

avoid the area within the box or the selected area of the road.

3. Select a distance, and press ENTER. The GPSMAP 378/478

recalculates your course based on your detour distance.

7. When ﬁnished, highlight the OK button, and press ENTER.

4. To end the detour manually, press NAV again, and select

Cancel Detour.

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AutoMotIve Mode > edItIng your route

5. If you selected Use Map, use the ROCKER to select an item

on the map, and press ENTER.

Adding and Editing Stops (Via Points)

You can add Via Points—points through which you would like to

travel—to your route using the Edit Vias option.

If you selected Use Find Menu, select an item from the Find

Menu as discussed in the “Finding an Item ” beginning on

page 17. Remember you can press MENU while the Find

Menu is open to ﬁnd an item near another location, such

as the destination. The new point is added to the route as

shown on the Add/Edit Vias Page.

To add Via Points to your route:

1. While navigating your route, press NAV to open the Navigate

Menu.

2. Select Edit Vias, and press ENTER. The Add/Edit Vias

window opens.

6. Repeat steps 3 through 5 until you have added all of the Via

Points that you want. Highlight Done, and press ENTER to

apply the new Via Points to the route.

3. Highlight Add Via Point, and press ENTER.

Add/Edit Vias Page

Showing the original route without Via Points

4. From the pop-up window, highlight either Use Map or Use

Find Menu, and press ENTER.

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AutoMotIve Mode > folloWIng An AutoMotIve route

Watch Your Trip Data

Use the Trip Computer Page to view your trip data. You can track

your speed here, as well as other information related to your trip.

Following an Automotive Route

The GPSMAP 378/478 guides you to your destination using many

tools, such as the Map Page and Current Route Page.

See Your Next Turn With the Current Route Page

Whenever you have initiated a turn-by-turn route in the

GPSMAP 378/478 set in Automotive Mode, the Current Route

Page shows each turn of the active route. For more information see

page 65.

Track Your Progress with the Map Page

You can track the progress of your route on the Map Page. Your

route is shown with a magenta line. The next turn is shown in the

top bar on the Map Page.

Map Page Displaying Your Route

Current Route Page

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AutoMotIve Mode PAges > MAP PAge

autoMotIve Mode PaGeS

Data ﬁelds

Automotive Mode has two main pages, Map and Trip Computer,

that are always available. Optional Highway and Compass Pages

can be turned on in Automotive Mode. When you are actively

navigating, the Current Route Page is available if you are navigating

a turn-by-turn route. The Active Route page is available if you are

navigating off road. For information about pages not discussed here,

see the “Marine Mode Pages ” section.

Current

locatꢀon

Map zoom

range

Map Page

Press the zoom keys (IN and OUT) to change the map zoom range.

Some items on the map appear only if the map is zoomed in to a

certain level.

Map Page

In Automotive Mode, by default, four user-selectable data ﬁelds

appear on the right side of the screen that can be conﬁgured to show

any one of the possible data options. The top of the screen shows the

GPS status or the route leg. You can also add data ﬁelds to the page

or select a full-screen map without data ﬁelds.

•

Press ENTER to quickly declutter (remove unwanted items)

from the Map Page.

•

Press MENU to open the options menu for the Map Page.

Show and hide the heading line from the options menu.

Use the ROCKER to measure the distance between two

objects on the map.

•

Change the page layout and data ﬁelds to customize the Map

Page.

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AutoMotIve Mode PAges > current route PAge

Current Route Page

Whenever you start a route in the GPSMAP 378/478 in Automotive

Mode, the Active Route Page shows each turn of the active route,

with the distance to the turn, the street name, and estimated time

to arrival and time of arrival. As you navigate a route, the turn list

automatically updates to indicate the next turn at the top of the list.

Next Turn Page

Saving the Current Route

You can save the current route from the Current Route Page. Press

MENU to save the route. Press ENTER when Save Route is

highlighted. Your route is automatically saved, using the starting

point and destination as the route name. Press ENTER when OK is

highlighted to ﬁnish saving the route.

Current Route Page

You can scroll through the entire list by moving the scroll bar up or

down. Highlight any of the turns on the list, and press ENTER to

view the Next Turn Page for that turn. The Current Route and Next

Turn Pages show similar information using a different layout. The

Next Turn Page shows your next turn on a map.

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AutoMotIve Mode PAges > trIP coMPuter PAge

Trip Computer Page Options Menu

Press MENU to open the options menu. Highlight an option, and

press ENTER.

Trip Computer Page

The Trip Computer Page shows important data while navigating a

route in Automotive Mode. It indicates your current speed and other

data about your trip, such as average speed and moving time.

Trip Computer Page Options Menu

Trip Computer Page

Set Up Page Layout—choose the layout and number of data ﬁelds.

Reset the Trip Computer before beginning a trip. If you make

frequent stops, leave the GPSMAP 378/478 turned on in order to

receive satellites. This allows the unit to accurately measure elapsed

time during the trip.

Change Nearest Type—allows you to specify the type of item to

be used as the nearest item [shown in the lower-left data ﬁeld of the

Position Data (2 Columns) layout]. The choices change based on

the current Usage Mode.

Reset (Trip, Max Speed, Odometer, All)—options to reset the

maximum speed, the odometer, everything but the max speed and

odometer, or reset everything in the trip computer.

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MAIn Menu > MAIn Menu tAbs

Main Menu Tabs

M aIn M enu

The Main Menu provides access to various waypoint, system,

navigation and interface management, and setup menus.

•

GPS—view satellite information.

Weather—view individual weather features.

XM—view and select XM Radio channels.

Route—create and store routes.

Points—view stored waypoints.

Track—record and save tracks.

DCS—set up digital select calling features.

Sonar—conﬁgure sonar options.

Alarms—deﬁne alarm settings.

Main Menu

Calendar—view sun/moon and hunting/ﬁshing information

for a speciﬁc day.

To select a tab from the Main Menu:

1. From any page, press MENU twice to open the Main Menu.

•

Celestial—view tide, hunting & ﬁshing, and sun & moon

information.

2. Highlight the tab you want. The information for the highlighted

tab automatically appears on the right. To highlight a sub

tab, press left or right on the ROCKER, and then press up or

down to select individual ﬁelds.

•

Message—view system-generated messages.

Display—adjust backlighting and page display.

Sound—customize GPSMAP 378/478 sounds.

Setup—adjust system settings.

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MAIn Menu > gPs tAb And WeAther tAb

GPS Tab

Weather Tab

The GPS tab provides a visual reference of satellite acquisition,

receiver status, and accuracy. The sky view and signal strength bars

give an indication of what satellites are visible to the receiver and

whether they are being tracked. For more information about GPS,

see pages 4-6.

Use the Weather tab on the Main Menu to view individual weather

features without turning all other weather features on or off. For

example, you can select Storm Cells to view only storm cells on

the Map window that appears on the Weather tab. When you close

the Main Menu and return to the Map Page, all of your previously

selected weather features still appear on the Map Page.

NOTE: You must have a subscription to XM WX Weather, and

the GXM 30 antenna must be plugged into the USB port on the

back of the unit to use features described in this section.

Main Menu—GPS Tab

Main Menu—Weather Tab

For more information about XM Weather, see the “Using XM WX

Weather ” section beginning on page 95.

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MAIn Menu > XM tAb

Information Sub Tab

XM Tab

Use the Information sub tab to view the radio identiﬁcation number,

XM WX Weather subscription information, and a list of weather

features available to you based on your subscription plan. The

Information sub tab also shows the age of each weather report in

minutes.

The XM tab is where you can view and select XM Radio channels,

add or delete favorites, and obtain radio ID and XM WX Weather

service level information. The XM tab is divided into two sub tabs:

Audio and Information.

NOTE: The XM tab always appears on the Main Menu,

regardless of whether the XM Audio Page is turned on or off.

For more information about the XM Audio Page, see page 52.

Radꢀo ID

Subscrꢀptꢀon

package

Channels

Category name

Avaꢀlable

weather

products

Age of

weather

report (ꢀn

Artꢀst name

mꢀnutes)

Song title

Information Sub Tab

Signal

strength

ꢀndꢀcator

Channel

number

Channel

name

For more information about XM Weather, see the “Using XM WX

Weather ” section beginning on page 94.

Main Menu—XM Tab

Audio Sub Tab

The Audio sub tab shows XM Radio channel categories, a list of

available channels, information about the selected channel, and the

strength of the XM signal.

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MAIn Menu > route tAb And PoInts tAb

Route Tab

Points Tab

The Route tab shows all the routes currently stored in memory,

along with a descriptive name for each route.

The Points tab contains two sub tabs, User and Proximity, which

allow you to manage a large number of waypoints quickly and

efﬁciently. For more information about waypoints, see the “Creating

and Using Waypoints ” section beginning on page 24.

Use the Route tab create and store up to 50 reversible routes, with

up to 300 points each. See the “Creating and Using Routes” section

beginning on page 20 for more information about routes.

Main Menu—Points Tab

Main Menu—Route Tab

User Sub Tab

The User sub tab shows a master list of all waypoints currently

stored in memory. The total number of stored and available

waypoints appear at the bottom of the User sub tab.

Proximity Sub Tab

Use the Proximity sub tab to deﬁne an alarm circle around a stored

waypoint location.

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MAIn Menu > trAcK tAb And dsc tAb

Track Tab

DSC Tab

Use the Track tab to specify whether or not to record a track log,

deﬁne how it is recorded, or save the track log data for future use.

The Track tab is divided into two sub tabs: Active and Saved. For

more information about tracks, see the “Managing Your Tracks”

section beginning on page 34.

Use the DSC tab (Marine Mode only) to control and set up the

Digital Selective Calling (DSC) features. DSC uses marine VHF

radio and GPS to transmit and receive location information. DSC is

used by mariners for distress calls and position reporting.

For more information about DSC and Maritime Mobile Service

Identity (MMSI) numbers, see pages 128-129 in the “Appendix .”

Main Menu—Track Tab

DSC Page

Active Sub Tab

The Active sub tab is for the active log (the log currently being

recorded). It shows the amount of track memory used and current

settings.

Saved Sub Tab

The Saved sub tab shows a list of all saved tracks in your

GPSMAP 378/478.

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MAIn Menu > dsc tAb

Each entry in the Call List and Log has a corresponding DSC Entry

Review Page. This page operates similarly to the Distress Page and

Position Report Page. From the DSC Entry Review, you can Delete

the entry, Save it as a waypoint, or show the location on the map.

Understanding Distress Calls

With your GPSMAP 378/478 properly connected to a VHF radio

with DSC output, you can receive any DSC distress call within

range. An alert message appears and a tone sounds when a distress

call is received. The alarm only sounds on a distress call; position

reports do not sound the alarm. Distress calls are broadcast to

all DSC users in radio range and appear with a blue and white

checkered icon on the DSC Call List and Log tabs.

To review a call or log entry:

1. Open the Call List or Log from the DSC tab.

2. Highlight the call you want to review.

3. Press ENTER to open the DSC Entry Review Page.

You can enter a caller’s name, if it is known. The caller’s name

replaces the MMSI number as a reference once entered.

Understanding Position Reports

The Position Report operates similarly to the distress call. This type

of contact is like a phone call; no emergency alarms are set off.

Position reports are not broadcast to all DSC users and appear with a

gold boat icon.

DSC Entry Review Page

Receiving DSC Calls

Each time you receive a distress call or position report, a review

page opens—either a DSC Position Report Page or a Distress Call

Page. Both pages contain identical ﬁelds to the DSC Entry Review

Page.

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MAIn Menu > dsc tAb

DSC Call List

The Call List sub tab shows the 50 most recent calls, even if the unit

is left unattended. The Call List only shows the most recent call from

a vessel. If a second call is received, it replaces the ﬁrst call in the Call

List. Press MENU to sort the list and delete entries.

DSC Log

Receiving a Position Report or Distress Call

After you receive a Position Report or a Distress Call, you can

quickly navigate to the location. Highlight a call from the Call List

or Log and press Direct To. The top selection in the Navigate Menu

is highlighted. Press ENTER to go to the location.

DSC Call List

DSC Log

DSC Directory

When DSC calls are received, they are automatically stored in the

Log, with the latest call at the top. The unit can store up to 100 calls;

after 100 calls are received, the oldest log ﬁle is removed when a

new call is received.

The DSC Directory is like a phone book and can hold up to 50

entries.

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MAIn Menu > dsc tAb

Enter the

MMSI number,

name, and a

comment (if

needed) ꢀn the

ﬁelds.

DSC Directory

entrꢀes. Press

ENTER to

open the Entry

Review Page.

Blank entry.

Press ENTER to

add a Directory

entry.

Highlight OK,

and press

ENTER to save

the Directory

entry.

DSC Directory list

New Directory Item Page

After creating a New Directory Item, the name created is attached

to that particular MMSI number. If you return to the Log, the new

name appears under the corresponding MMSI number.

To add a new Directory entry:

1. Open the DSC Directory on the Main Menu.

2. Highlight the ﬁrst blank space in the directory list, and press

ENTER.

Another way to input a name is from the Entry Review Page or the

DSC Distress Call Page or DSC Position Report Pages. The Name

and MMSI are sent to other Garmin GPS units: Only the MMSI

numbers are sent to other non-Garmin DSC users.

Press MENU, highlight New Item, and press ENTER.

3. Enter the MMSI number, the name, and any comments.

4. When ﬁnished, highlight OK, and press ENTER.

Making a Distress Call

To make a distress call, press the MayDay button on your VHF

radio. The call transmits on an emergency channel with the MMSI

number attached to the call, if you have DSC support. Any DSC-

equipped mariner (on sea or land) within range can receive the call.

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MAIn Menu > sonAr tAb

Setting Up DSC

Sonar Tab

Use the Setup sub tab to turn DSC on and off. If you have more than

one chartplotter and only want DSC to show on another chartplotter,

turn DSC off on this unit.

Use the Sonar tab contains options for the Sonar Page. See the

“Setting Up and Using Sonar ” section beginning on page 103 for

more information about sonar setup options.

This Setup sub tab also allows you to simulate distress calls and

position reports while the unit is in Simulator Mode (see page 12).

Simulating calls is helpful for practice before connecting to the real

system. The Distress Call simulator also helps to check if alarms are

working properly.

NOTE: You must have a GSD 21 Sounder Module connected to

your GPSMAP 378/478 to use sonar.

Main Menu—Sonar Tab

DSC Setup

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MAIn Menu > AlArMs tAb

To set a persistent alarm:

1. Highlight the Alarms tab on the Main Menu.

Alarms Tab

Use the Alarms tab to deﬁne alarm settings. When an alarm goes off,

the alarm message appears on the GPSMAP 378/478 and the unit

emits ﬁve (5) beeps.

2. Highlight the box next to the alarm you want to make

persistent.

3. Press ENTER to place a check mark in the Persist box.

Navigation (Nav) Alarms

The Nav sub tab contains the following alarms:

Next Turn—sets an alarm to indicate the next turn in a route. Select

Dist to specify a distance before you reach the next turn to sound the

alarm. Select Time to specify a time before the turn for the alarm to

go off. Select Auto for the unit to provide a Next Turn alarm at its

discretion.

Main Menu—Alarms tab

Arrival—sets an alarm to sound when you are a speciﬁed distance

or time away from a destination waypoint. Select Auto for the unit

to provide an Arrival alarm at its discretion.

To set an alarm:

1. Highlight the Alarms tab on the Main Menu.

2. Select an alarm to set, and press ENTER.

Off Course—sets an alarm to sound when off course. Select On,

then enter a distance.

3. Change the setting to On, and press ENTER. If necessary,

highlight the next ﬁeld to the right, and press ENTER. Enter

the settings you want.

Anchor Drag—sets an alarm to sound when you exceed a speciﬁed

drift distance. Select On, and then enter a distance.

4. Press ENTER to ﬁnish.

When you set an alarm to be persistent, the alarm message appears

on the screen and the unit beeps until you press ENTER to

acknowledge the alarm.

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MAIn Menu > AlArMs tAb

System Alarms

Weather Alarms

Tornado Warnings—sets an alarm to sound when you enter an area

where a tornado warning is in effect.

Clock—sets an alarm based on the unit’s clock. Select On, and

then enter a speciﬁc time that you want the alarm to sound. The

GPSMAP 378/478 must be on for the clock alarm to work.

Thunderstorm Warnings—sets an alarm to sound when you enter

Ext. (External) Voltage—sets an alarm to sound when the external

voltage drops below a speciﬁed amount. Select On, and then enter a

speciﬁc voltage.

an area where a severe thunderstorm warning is in effect.

Flood Warnings—sets an alarm to sound when you enter an area

where a ﬂood warning is in effect.

DGPS—sets an alarm to sound when the GPSMAP 378/478 loses a

differential ﬁx.

Flash Flood Warnings—sets an alarm to sound when you enter an

area where a ﬂash ﬂood warning is in effect.

Accuracy—sets an alarm to sound when GPS accuracy falls outside

of the user-set value. Select On, and then specify a distance.

Marine Warnings—sets an alarm to sound when you enter an area

where a marine warning is in effect.

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MAIn Menu > cAlendAr tAb

Sonar Alarms

Calendar Tab

Shallow Water/Deep Water—sets an alarm to sound when you

enter an area of water that is too shallow or deep. Select On, and

then specify a depth. You must be receiving sonar NMEA data for

this function to work.

Use the Calendar tab to plan trips, view sun and moon, and hunting

and ﬁshing information for the day.

Highlight an arrow and press ENTER to change the date in the view.

Water Temp—sets an alarm to indicate if the water temperature has

exceeded or dropped below a speciﬁc temperature, or fallen outside/

inside a speciﬁc temperature range. Select Above or Below and then

enter a speciﬁc temperature, or select Inside or Outside and enter a

range of temperatures. You must be receiving sonar NMEA data for

this function to work.

Sunrꢀse and

List of points

and routes

added to thꢀs

date.

sunset tꢀmes

for the current

locatꢀon and

date.

Drift—sets an alarm to sound when you exceed a speciﬁed drift

distance. Select On, and then enter a speciﬁc distance.

Calendar Tab in Day View

Fish—sets an alarm to sound when ﬁsh are detected with sonar.

Calendar Options

The options menu is available in all three calendar views. Press

MENU on any of the calendar views to open the options menu.

To view the Sun & Moon Information tab or Hunt & Fish sub tab,

highlight View Sun and Moon or View Hunt and Fish, and press

ENTER.

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MAIn Menu > celestIAl tAb

To add a route (or point) to the calendar:

1. Highlight the Calendar tab on the Main Menu. The current

day appears on the Day View sub tab.

Celestial Tab

The Celestial tab shows tide information, sun and moon information,

and hunting and ﬁshing information. You can view data for your

current location, a location from the map, or a waypoint location.

Also, you can select a different date and time, or use the current

data.

2. Press MENU to open the options menu. Highlight Add Route

(or Add Point), and press ENTER.

3. From the pop-up route list (or the Find Menu if Add Point

was selected), select the route you want to add to the

calendar, and press ENTER.

Day View Sub Tab

The Day View sub tab shows sunrise and sunset times for your

current date and location. Points and routes for the day appear in a

list.

Week View Sub Tab

Main Menu—Celestial Tab

The Week View sub tab provides the same elements as Day View,

but the entire week is visible. Days with added points or routes are

shown highlighted in green. Icons for the points and routes assigned

to the date are shown along the bottom of the screen.

To access the Celestial tab:

1. Highlight the Celestial tab on the Main Menu.

2. Use the ROCKER to select the sub tab you want, such as

Sun & Moon.

Month View Sub Tab

The Month View sub tab provides the same elements as Day View,

but the entire month is visible. Days with added points or routes are

shown highlighted in green. Icons for the points and routes assigned

to the date are shown along the bottom of the screen.

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MAIn Menu > celestIAl tAb

To view a tide chart for a different tide station:

1. From the Tide sub tab, highlight the At ﬁeld, and press

ENTER. The Find Menu opens showing the tide stations.

Tide Sub Tab

The Tide sub tab contains a graphical chart that shows tide station

information in a 24-hour span starting at midnight station time. You

can choose from different dates and more than 3,000 tide stations.

2. Press MENU, and select Near Current Location, Near

Current Route, Near Other (select another location using

the map), or Near Destination. The list is updated with your

search requirements.

Enter the date for which you want to

view the tide information.

Select the tide station for which you

want to view the information.

Tꢀme

Height of tide

3. Select a tide station from the list, and press ENTER. The

Tide Station Information Page appears.

4. Highlight OK, and press ENTER. The Tide tab appears again

showing the tide chart for the selected tide station.

Smallest and

largest tides

for the AM

hours

Smallest and

largest tides

for the PM

hours

To view the tide chart for another date:

1. From the Tide sub tab with a chart open, highlight the On

ﬁeld, and press ENTER.

Tide Sub Tab

2. ENTER the date with the ROCKER, and press ENTER. You

can also use the zoom IN and OUT keys to view information

for another date. Press and hold IN or OUT to scroll quickly

through dates.

The top of the page shows the tide station and date being referenced.

The chart shows a 24-hour block of time, with the time progressing

from left to right. The solid vertical lines represent 4-hour

3. Press ENTER when ﬁnished. The unit shows the chart for the

date you entered or selected.

increments; the dotted vertical lines represent 1-hour increments.

To use the current date again, highlight the Date ﬁeld. Press MENU,

highlight Use Current Date, and press ENTER.

The tide curve appears as a shaded area; higher tides are taller and

lower tides are shorter. The bottom of the page indicates the times

with the highest and lowest tides.

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MAIn Menu > celestIAl tAb

To view a chart’s details for another time during the

day (other than current time):

To view sun and moon information for a different date:

1. Highlight the Date ﬁeld, and press ENTER.

1. From the Tide sub tab with the chart you want to view, press

2. Use the ROCKER to change the digits of the date to the date

you want. You can also use the zoom IN and OUT keys to

view information for another date. Press and hold IN or OUT

to scroll quickly through dates.

MENU, and then select Move Cursor.

2. Press the ROCKER right or left to view the chart at another

time.

3. Press ENTER when ﬁnished. The unit shows the sun and

3. To return to the current time, press MENU, and select Stop

Moving Cursor.

moon information for the date you entered or selected.

4. To use the current date again, highlight the Date ﬁeld. Press

MENU, highlight Use Current Date, and press ENTER.

To automatically start Pointer Mode to scroll the chart:

1. Highlight the Date ﬁeld. Then press down to start the Pointer

(Pan) Mode.

Select the

date and

locatꢀon

Moon phase

2. Scroll the chart right to view the next day or left to view the

previous day.

Sun & Moon Sub Tab

Location of the

sun and moon

in the sky view

Anꢀmatꢀon

controls for the

sky view

The Sun & Moon sub tab provides you with sunrise/sunset and

moon rise/set times. A graphic of the moon phase also appears.

You can view Sun & Moon information for any date or location.

You can also use the play, fast forward, and stop buttons to view an

animation of the Sun & Moon sub tab.

Sun & Moon Sub Tab

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MAIn Menu > celestIAl tAb

To view sun and moon information for a different

location:

1. Highlight the From ﬁeld, and press ENTER.

Hunt & Fish Sub Tab

The Hunt & Fish sub tab provides you with predictions of the best

times to hunt and ﬁsh in a selected location on a speciﬁc date.

2. Highlight Use Find Menu, and press ENTER. The Find Menu

To show the Hunt & Fish information:

1. Highlight the Celestial tab on the Main Menu.

automatically opens.

3. Select a waypoint or point of interest, and press ENTER.

2. Select the Hunt & Fish sub tab.

4. On the Waypoint Information Page, press ENTER. The unit

shows the sun and moon information for the location you

selected.

To use the current location, highlight the From ﬁeld. Press ENTER,

highlight Current Location, and press ENTER again.

Hunt & Fish Sub Tab

To view hunt and ﬁsh information for a different date:

1. Highlight the Date ﬁeld, and press ENTER.

2. Use the ROCKER to change the digits of the date. You can

also use the zoom IN and OUT keys to view information for

another date. Press and hold IN or OUT to scroll quickly

through dates.

3. Press ENTER when ﬁnished. The unit shows the information

for the date you entered.

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MAIn Menu > MessAge tAb

To use the current date again, highlight the Date ﬁeld. Press MENU,

highlight Use Current Date, and press ENTER.

Message Tab

The Message tab shows a list of messages generated by the

GPSMAP 378/478. Use the ROCKER to scroll through the entire

list of messages on the Log sub tab. Use the Log Filter sub tab to

show only the message types that you want to view.

To view hunt and ﬁsh information for a different

location:

1. Highlight the From ﬁeld, and press ENTER.

2. Highlight Use Find Menu, and press ENTER. The Find Menu

opens.

3. Select a point, and press ENTER.

4. On the information page, press ENTER. The unit shows Hunt

& Fish information for the selected location.

To use the current location:

1. Highlight the From ﬁeld, and press ENTER.

Main Menu—Message Tab

2. Highlight Current Location, and press ENTER.

To view messages:

1. Highlight the Message tab on the Main Menu.

2. Highlight a message.

3. Press ENTER to view detailed information about the

message.

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To show or hide messages using the log ﬁlter:

1. Highlight the Message tab on the Main Menu.

Display Tab

Use the Display tab to set display features, such as pages to show in

the main page sequence and how long the backlight stays on.

2. Highlight the Log Filter sub tab. All messages appear by

default.

Main Menu—Display Tab

Message Log Filter Tab

Main Menu—indicates whether the Main Menu tabs are to contain

text and icons (default), or text tabs only.

3. Highlight the message type you want to hide, and press

ENTER. The message name appears in the Hide window.

Color Mode—sets the display to Day, Night, or Auto Color Mode.

Select Auto to automatically switch from day to night at sunset and

change back at sunrise.

4. Highlight the message, and press ENTER to show it again.

Backlight Timeout—sets the backlight to stay on when it is turned

on, or to time out after a selected period of time has elapsed when

using the battery. The backlight stays on regardless of this setting

when external power is used.

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Twilight Adjustment—allows the unit to adjust the backlight for

optimum viewing during twilight times.

Sound Tab

Use the Sound tab to customize the sounds made by your

GPSMAP 378/478.

Highway Page—indicates whether the Highway Page appears in the

main page sequence.

XM Audio Page—indicates whether the XM Audio Page appears in

the main page sequence.

Compass Page—indicates whether the Compass Page appears in the

main page sequence.

Backlight Intensity—turns the backlight up or down. Press right on

the ROCKER to increase the intensity or left to decrease.

Main Menu—Sound Tab

Beeper—sets the beeper to chime during keypresses and alarms

(Key and Alarm) or on Alarms Only.

Audio Jack—sets the audio jack output for Headphones or

Line Out.

Attention Tone—turns on and off the attention tone that sounds

before the vocal prompts.

Voice Prompt—sets the vocal prompt to operate for Guidance and

Status, Route Guidance Only, or No Voice Prompts.

Voice Language—sets the language for vocal prompts.

Speaker Volume—sets the external speaker or headphone volume.

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MAIn Menu > setuP tAb

Usage Mode—sets the unit to operate in Marine (default) or

Automotive Mode.

Setup Tab

To customize how your GPSMAP 378/478 looks, use the System tab

to adjust certain system settings.

Speed Filter—allows the unit to average speed readings. Choose

from Off, Auto (automatically controls ﬁltering), or On (allows you

to enter a value in seconds).

System Sub Tab

Use the System sub tab to control settings for System Mode, Speed

Text Language—sets the unit’s on-screen language.

WAAS—allows you to enable or disable WAAS.

Filter, Text Language, WAAS, and External Power.

To access the System sub tab:

1. Highlight the Setup tab on the Main Menu.

External Power Off—indicates whether the GPSMAP 378/478

remains on (Stay On) or the unit turns off (Turn Off) when external

power is removed from the unit.

2. Select the System sub tab.

External Power On—indicates whether to turn on the

GPSMAP 378/478 (Turn On) or charge the battery

(Charge Battery) when external power is applied to the unit.

Main Menu—System Setup Tab

System Mode—sets the unit to operate in Normal Mode, Battery

Saver Mode, or Simulator Mode (for practice ONLY).

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Ask My Preference—determines whether you are asked to select a

Route Preference before route calculations.

Road Routing Sub Tab

Use the Road Routing sub tab to select road routing settings.

Calculation Method—sets how the unit searches for the route.

To access the Road Routing sub tab

1. Highlight the Setup tab on the Main Menu.

•

Quickest Calculation—calculates the route the quickest, but

it might not produce the best route.

2. Select the Road Routing sub tab.

Quick Calculation—takes a bit more time to calculate but

generates a better quality route.

Better Route—generates an even better quality route but uses

a longer calculation time.

Best Route—generates the optimal route but takes the longest

time to calculate.

Calculate Routes for—sets route calculation for the particular

Road Routing Sub Tab

vehicle you are operating to optimize the route for your vehicle type.

Avoid—allows you to avoid certain road types and maneuvers on

your route. The unit uses these road types only if alternative routes

take you too far out of your way or if no other road is available.

Route Preference—allows the unit to calculate routes based on:

•

Faster Time—routes calculated are faster to drive but might

be longer in distance.

Custom Avoids—allows you to enter speciﬁc areas and roads that

you would like to avoid in your navigation.

Shorter Distance—routes calculated are shorter in distance

but might take more time to drive.

Custom Road Prefs—allows you to avoid or use Major, Medium,

and Minor roads using a slider scale. This is useful if you want to

avoid major highways, for example. Select Auto Set to use preset

values.

Off Road—creates a direct line from your current location to

your destination. This is useful when traveling outside of the

detailed map coverage area or where no roads exist.

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Guidance Sub Tab

Use the Guidance sub tab to set guidance information.

Timers Sub Tab

Use the Timers sub tab to set timers and view information about how

long the unit has been on.

To access the Guidance sub tab

1. Highlight the Setup tab from the Main Menu.

To access the Timers sub tab

1. Highlight the Setup tab from the Main Menu.

2. Select the Guidance sub tab.

2. Select the Timers sub tab.

Guidance Sub Tab

Timers Sub Tab

Off-Route Recalculation—allows you to set whether the unit

prompts you when it is recalculating your route (Prompted), or

recalculates automatically. Set whether the unit announces the

recalculation (Automatic - Announced) or recalculates silently

(Automatic - Silent). You can turn the off-route recalculation Off.

User—allows you to set the timer to Count Up or Count Down.

You can also Reset the timer and turn it Off. Enter a time to use

when counting up or down.

Marine—appears on the Compass Page in Marine Mode.

Next Turn Pop-up—turns the Next Turn pop-up window Off, or

opens the window when you press NAV (Held NAV Key Only),

opens automatically (Automatically Only), or Both.

Since Midnight—shows the time the unit was turned on since

midnight. To reset, select All Unit Defaults on the System sub tab.

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Time Sub Tab

Units Sub Tab

Use the Units sub tab to customize measurement units.

Use the Time sub tab to set the time format and zone, and set the

unit to conform to Daylight Saving Time. The current time and date

appear in the Current Time and Date ﬁeld.

To access the Units sub tab

1. Highlight the Setup tab on the Main Menu.

To access the Time sub tab

1. Highlight the Setup tab on the Main Menu.

2. Select the Units sub tab.

2. Select the Time sub tab.

Distance and Speed—selects the unit of measure to show your

speed and distance traveled.

Time Sub Tab

Direction Display—selects the unit of measure to show your

direction. Mils is a unit of angle measurement used in military

settings, in which 17.78 mils equal one degree.

Time Zone—choose the time zone for your city so the

GPSMAP 378/478 will show the correct local time. Select Other to

enter a UTC Offset.

Temperature—selects the unit of measure to show the temperature.

Elevation—selects the unit of measure to show your altitude.

Depth—selects the unit of measure to show the depth.

If the wrong date appears, press MENU, highlight Set Date, and

press ENTER. You are prompted to enter the current year. The

GPSMAP 378/478 uses this information when gathering satellite

data to show the correct date.

Vertical Speed—selects the unit of measure to show the vertical

speed.

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MAIn Menu > setuP tAb

The default setting is WGS 84. The unit automatically selects the

best datum depending on your chosen location format.

Location Sub Tab

Use the Location sub tab to change location setting information.

WARNING: Selecting the wrong map datum can result in

substantial position errors. When in doubt, use the default

WGS 84 datum for best overall performance.

To access the Location sub tab:

1. Highlight the Setup tab on the Main Menu.

2. Select the Location sub tab.

See the “Appendix” for more information about location formats

and map datums. Also visit the National Imagery and Mapping

Agency at www.nima.mil for more information on grids and datums.

Selecting a Different Heading Reference

You can select from Auto Mag Var, True, Grid, and User Mag Var.

Auto Mag Var provides magnetic north heading references that are

automatically determined from your current location. True provides

headings based on a true north reference. Grid provides headings

based on a grid north reference (and is used in conjunction with

the grid position formats). User Mag Var allows you to specify the

magnetic variation at your current location and provides magnetic

north heading references based on the variation you enter. Enter

the magnetic variation of your current location in the Magnetic

Variation ﬁeld if you selected User Mag Var for the heading.

Changing the Location Format

When you change the Location Format, you change the coordinate

system in which a given location reading appears. The default

format is latitude and longitude in degrees, minutes, and thousandths

of a minute (hddd°mm.mmm). Only change the location format if

you are using a map or chart that speciﬁes a different location format

or want to use a format you are familiar with.

Selecting a Different Map Datum

WARNING: If User Mag Var is selected, the unit does not

automatically calculate and update the magnetic variation at

your present location. You must update the magnetic variation as

your location changes. Failure to update this setting can result in

substantial differences between the information shown on your

unit and external references, such as a magnetic compass.

Datums are used to describe geographic positions for surveying,

mapping, and navigation and are not actual maps built in the unit.

Only change the datum if you are using a map or chart that speciﬁes

a different datum.

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MAIn Menu > setuP tAb

3. To show the welcome message when you turn on your

Welcome Sub Tab

GPSMAP 378/478, highlight the Show at Power-up check

box, and press ENTER to select it. To hide the welcome

information at start-up, clear the check mark.

Use the Welcome sub tab to enter information, such as your name

and address, or a welcome message that appears when you turn on

your GPSMAP 378/478.

Interface Sub Tab

To access the Welcome sub tab:

1. Highlight the Setup tab on the Main Menu.

Use the Interface sub tab to change the data format and control the

input/output format used when connecting your unit to external

devices.

2. Select the Welcome sub tab.

To access the Interface sub tab:

1. Select the Setup tab on the Main Menu.

2. Select the Interface sub tab.

Welcome Sub Tab

To add a welcome message:

1. Highlight one of the Welcome Message ﬁelds, and press

ENTER.

Interface Sub Tab

2. Use the ROCKER to enter information in the ﬁelds. You do

not need to enter information in every ﬁeld. When ﬁnished,

press ENTER again.

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Serial Data Format—sets the data format to one of the following:

•

Text Out—allows the unit to output simple text data that

includes data, time, location, and velocity. The Baud can be

set to 1200, 2400, 4800, or 9600.

•

Garmin Data Transfer—provides the proprietary format

used to exchange data with a computer or another Garmin

GPSMAP 378/478. Garmin Data Transfer is disabled when

the USB is connected, and the unit automatically switches to

USB format. When the USB is disconnected, the USB ﬁeld

changes to Transfer Mode.

None—provides no interfacing capabilities.

If you select GARMIN DGPS or RTCM In/NMEA Out format,

you can control a differential beacon receiver directly from your

GPSMAP 378/478 using the Interface sub tab. You can have the unit

automatically scan for the DGPS beacon signal, or you can enter the

beacon frequency and bit rate on the unit, and the information will

be used to tune the beacon receiver. If you use a DGPS receiver,

WAAS capability is automatically turned off.

•

GARMIN DGPS—connects the GPSMAP 378/478 with a

Garmin DGPS beacon receiver.

Garmin Remote Sonar—connects the GPSMAP 378/478

with a GSD 21 or GSD 20 Sounder Module and transducer.

NMEA In/NMEA Out—supports the input/output of

standard NMEA 0183 version 3.01 data and sonar NMEA

input support for the DBT, DSE, DPT, MTW, and VHW

sentences.

To have the unit automatically scan for a frequency:

1. Set the unit to GARMIN DGPS or RTCM In/NMEA Out.

2. Highlight the Beacon ﬁeld, and press ENTER.

3. Highlight Scan, and press ENTER. The numbers in the

Frequency ﬁeld change as the unit scans from 284 kHz to

325 kHz, 200 bit rate, then 100, at 6-second intervals.

•

RTCM In—allows DGPS input using a standard RTCM

format.

RTCM In/NMEA Out—allows DGPS input using a standard

RTCM format and also provides NMEA 0183 version 3.01

output.

•

RTCM In/Text Out—allows Differential GPS (DGPS) input

using a standard RTCM format and also outputs simple text

data that includes data, time, location, and velocity.

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Shows the

status of the

scan

Highlight Scan

and press

To restart the scan:

1. Press MENU.

ENTER.

2. Highlight Restart Scan, and press ENTER.

To manually enter a frequency and bit rate:

1. With the unit set to Garmin DGPS or RTCM In/NMEA Out,

highlight the Beacon ﬁeld, and press ENTER.

2. Highlight User, and press ENTER.

Interface Sub Tab with Garmin DGPS Selected

The Status ﬁeld shows one of the following:

3. Highlight the Frequency or Bit Rate ﬁeld, and press ENTER.

4. Enter a frequency or bit rate. Press ENTER when ﬁnished

When the unit is receiving a DGPS signal, the Signal to Noise Ratio

(SNR) and Distance ﬁelds show data. The SNR range is 0 dB to 30

dB, with 30 being the best. The Distance ﬁeld might or might not

show data, depending on the signal being broadcast from the DGPS

site.

•

Tuning—the unit is attempting to tune to the speciﬁed

frequency and bit rate.

Scanning—the unit is automatically scanning through the

frequencies and bit rates.

Receiving—the unit is receiving DGPS signal and ready for

operation.

The DGPS beacon transmitters are operated by the United States

Coast Guard (or similar government agency in other countries),

which is responsible for their accuracy and maintenance. For DGPS

transmitter problems or to ﬁnd the most updated list of frequencies

and coverage areas, contact your local USCG or see their Web site at

www.navcen.uscg.mil/.

Check Wiring—the unit is not making connection with

DGPS receiver.

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Advanced NMEA Output Setup

If you are going to interface the GPSMAP 378/478 with another

piece of equipment (such as a radar or autopilot), the unit needs

to be set to output NMEA data. The NMEA data transmission can

be customized to keep the output rate at two seconds. If too many

NMEA sentences are activated, the unit might take longer than two

seconds to update.

Advanced NMEA Output Setup

You can also set the Output Rate to Fast to output a minimum

number of NMEA sentences at one-second intervals.

Use the Advanced NMEA Output Setup Page to set the output rate,

change the precision of the Lat/Lon minutes, set Waypoint IDs to

names or numbers, and turn on and off the GPS status, the Garmin

Proprietary sentences, and Waypoint/Route (WPL, RTE).

To access the Advanced NMEA Output Setup:

1. Highlight the Setup tab on the Main Menu.

2. Select the Interface sub tab.

3. Highlight the Serial Data Format ﬁeld, and press ENTER.

4. Select NMEA In/NMEA Out, and press ENTER.

GPSMAP 378/478 NMEA Sentence Output (NMEA version 3.01

compliant):

5. Press MENU to open the options menu. Select Advanced

NMEA Setup, and press ENTER.

•

Always transmitted: GPRMC, GPGGA, GPGLL, GPBWC,

GPVTG, GPXTE, GPRMB

•

Switchable sentences: GPGSA, GPGSV, GPWPL, GPRTE

Garmin proprietary: PGRME, PGRMZ, PGRMM

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usIng XM WX WeAther > vIeWIng XM WX WeAther And settIng XM WX WeAther oPtIons

Viewing XM WX Weather

From the Map Page, you can turn weather information on or off.

uSInG XM WX Weather

This section describes how to use XM WX Satellite Weather with

your GPSMAP 378/478. You must have a subscription to XM WX

Weather, and you must plug your GXM 30 antenna into the USB

port on the back of the unit to receive the XM signal. If you do not

have a subscription to XM WX Weather, the features described in

this section work only when the GPSMAP 378/478 is in Simulator

Mode and the GXM 30 antenna is unplugged.

To turn XM WX Weather on or off on the Map Page:

Press and hold the MENU/Wx key to toggle XM Weather on

or off.

Press MENU, select Hide (Show) Weather, and then press

ENTER.

You can view XM WX Weather on your GPSMAP 378/478 in one

of three ways:

•

To view all weather information on the map, use the Map

Page.

•

To view a speciﬁc weather feature such as NEXRAD Radar or

Storm Cells, for example, you can use the Weather tab on the

Main Menu. For more information, see page 98.

Map Page with XM WX Weather

•

To view current weather conditions and forecast information

for your current location or a speciﬁc location, use the

Weather Data option on the Find Menu. For more information,

see page 101.

Setting XM WX Weather Options

Use the Map Page options menu to adjust the way weather items

appear on the Map Page. Three tabs—Weather, Srfc Wx, and Mrn

Wx—allow you to adjust what weather items appear on the Map

Page, and the scale at which they appear. For detailed information

about speciﬁc weather features, see the GXM 30 Owner’s Manual.

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To set up weather options on the Map Page:

1. From the Map Page, press MENU to open the options menu.

Weather Tab

Use the Weather tab to turn XM WX Weather data on or off on

the Map Page, and set the map zoom range at which weather

information ﬁrst appears on the Map Page.

2. Highlight Set Up Map, and press ENTER.

Map Page Options Menu

Weather Tab

3. Highlight the Weather, Srfc Wx, or Mrn Wx tab.

4. Highlight the ﬁeld you want to change, and press ENTER.

5. Press PAGE or QUIT to exit.

Weather Data—allows you to turn XM WX Weather data on or off

from the Map Page.

NEXRAD Radar, Satellite Mosaic, Lightning, Storm Cells,

Hurricanes—sets the map scale at which the feature ﬁrst appears on

the Map Page. Select Auto, Off, or from 20 ft to 800 nm.

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Srfc Wx Tab

Use the Srfc Wx tab to set the map scale at which surface weather

Mrn Wx Tab

Use the Mrn Wx tab on the Map Page Options to set up marine

information ﬁrst appears on the Map Page.

weather options.

Srfc Wx Tab

Mrn Wx Tab

Surface Winds, Surface Pressure, Fronts, Visibility, County

Warnings—sets the map scale at which each feature ﬁrst appears on

the Map Page. Select Auto, Off, or from 20 ft to 800 nm.

Water Temperature, Wave Period, Wave Direction, Wave

Height, Marine Warnings—sets the map zoom range at which each

feature ﬁrst appears on the Map Page. Select Auto, Off, or from

20 ft to 800 nm.

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3. Select (scroll through) the weather information type you

want to view. The map refreshes to show only the selected

information type.

Using the Weather Tab

Use the Weather tab on the Main Menu to quickly view individual

weather settings without turning all other weather features on or off.

For example, you can select Storm Cells to view only storm cells

on the Weather tab. When you close the Main Menu and return to

the Map Page, all of your previously selected weather features still

appear on the Map Page.

From the Weather tab, you can view the current conditions or

forecast on the map for the next 12, 24, 36, or 48 hours.

To view the forecast map:

1. In the Weather Information Type ﬁeld, highlight Forecast.

The Map window shows the current forecast in the Map

window.

Depending on which mode you are in, different options appear. Use

the zoom IN and OUT keys to zoom in or out on the map.

Weather information type

Map

wꢀndow

Map

wꢀndow

Forecast Map

Age of the

weather report

Weather Tab with Storm Cells

2. Highlight the ﬁeld to the right of Forecast, and press ENTER

to show a list of forecast options.

To view a speciﬁc XM WX Weather Information Type:

1. Highlight the Weather tab on the Main Menu.

2. Select the Weather Information Type ﬁeld.

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3. Highlight the forecast you want to view—Current, 12 Hour,

24 Hour, 36 Hour, or 48 Hour, and press ENTER. The

Map window on the Weather tab is updated with forecast

information for the time you selected.

Animate Weather (Stop Animation)—animates NEXRAD Radar

and Satellite Mosaic weather. When selected, a series of frames

appear, each showing a different time in the lower-left corner of the

map. Up to six frames appear, beginning with the oldest to the most

current weather data.

The age of the weather report appears in the bottom-left corner of

the Map window on the Weather tab.

Show Map Pointer—allows you to switch from Pan Mode to

Pointer Mode and show the map pointer in the map area so you can

pan the map.

To pan the map:

Press and hold the MENU/Wx key, or press MENU, highlight

Show Map Pointer, and press ENTER. The panning arrow

appears so you can pan the map to view other map areas.

Weather Legend—shows the color legend for Radar, Fronts,

County Warnings, and Other features. Press right or left on the

ROCKER to view each weather legend.

Weather Options

Use the options menu on the Weather tab to select weather options

for the Map window on the Weather tab.

To select weather options:

1. Highlight the Weather tab on the Main Menu.

2. Press MENU.

Declutter On (Off)—allows you to toggle unwanted weather items

on or off on the Map window.

Weather Legend

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Viewing Additional XM Weather Information

Use the Information sub tab to view the radio identiﬁcation number,

service level information, and list of weather products.

Accessing GXM 30 Antenna Information

Use the Information sub tab to obtain version information about

your GXM 30 antenna.

Age (in minutes) of weather data

To view information about your GXM 30 antenna:

1. Highlight the XM tab on the Main Menu.

Radꢀo ID

2. Select the Information sub tab.

3. Press MENU.

Subscrꢀptꢀon

package

4. With Antenna Information highlighted, press ENTER. A

window appears showing the software version loaded to your

GXM 30 antenna.

List of available

weather features

Information Sub Tab

The Information sub tab contains the following information:

Radio ID—contains the eight-digit identiﬁcation number of the

radio built into your GXM 30 antenna. You must provide this ID to

XM to start your XM Radio and XM WX Weather subscriptions.

Service Level—shows the name of the XM WX Weather

subscription plan you purchased.

5. Press ENTER to close the window.

Weather Products—shows a list of all weather features you can

access based on your subscription plan. Shows age of weather data

in minutes.

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3. Highlight the Forecast tab to view the weather forecast for

Finding Weather Information

your current location.

You can use the Find Menu to access weather information for your

current location or from another location on the map. By selecting

the Weather Data option on the Find Menu, you can view the current

conditions, forecast information, sea surface conditions, and weather

bulletins. For more information about the Find Menu, see “Finding

an Item ” beginning on page 17.

Forecast high

temperature

Chance of

precꢀpꢀtatꢀon

Forecast low

temperature

To ﬁnd weather information for your current location:

1. From any page, press FIND.

Weather Forecast

2. Select Weather Data, and press ENTER. The Weather From

Current Location Page opens.

4. Highlight the Sea Surface tab to view sea surface

information.

Weather From Current Location

Sea Surface Information

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5. Highlight the Bulletin tab to view marine weather bulletins.

To ﬁnd weather data for a different location:

1. Press MENU on the Weather From Current Location Page.

2. With Near Other highlighted, press ENTER.

Marine Weather Bulletins

You can highlight a weather bulletin, and press ENTER to view the

full text of the marine weather bulletin.

3. Move the map pointer to a different location, and press

ENTER. The Weather From (New Location) Page opens with

weather information for the selected location.

4. Press MENU, highlight Near Current Location, and then

press ENTER to return to the forecast for your current

location.

Marine Weather Bulletin

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4. Press MENU. Highlight Set Up Page Layout, and press

ENTER.

SettInG uP and uSInG Sonar

This section covers the additional sonar options for the

GPSMAP 378/478 when used in conjunction with a GSD 21

Sounder Module. Read the GSD 21 Sounder Module Installation

Instructions to properly install the sounder module. When you turn

on your GPSMAP 378/478, the sounder module automatically turns

on.

5. Highlight Map with Sonar, and press ENTER.

NOTE: You MUST have a GSD 21 installed and connected to

your GPSMAP 378/478 to use the sonar features.

Map Page with Split Screen

The Sonar Page is added to the end of the page sequence when you

are in Marine Mode. To view the Sonar Page, press PAGE or QUIT

repeatedly until it appears.

To resize the Map Page sonar split screen:

1. After showing the Sonar and Map Pages together in the split

screen as described in the previous steps, press MENU.

Showing Sonar on the Map Page

You can change the layout of the Map Page to view a split screen to

show the sonar on the Map Page. You must be in Marine Mode to

use sonar.

2. Highlight Size Split, and press ENTER.

3. Use the ROCKER to move the vertical double-arrow right or

left.

4. Press ENTER.

To show the Sonar Page on the Map Page:

1. Press and hold PAGE/MODE.

5. To stop resizing the screen, press QUIT. You can also press

MENU, highlight Stop Resizing, and press ENTER to stop

resizing the screen and retain the previous split setting.

2. Highlight Marine, and press ENTER.

3. Press PAGE or QUIT to open the Map Page.

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The sonar returns show as red (strongest), then orange (strong),

yellow (medium), green (weaker), and blue (weakest). The Fish

Symbols option allows you to view the actual sonar data, a ﬁsh

symbol or a combination of both. When the unit is set to Dual, the

appearance of the ﬁsh symbols changes. Fish symbols from the

center of the beam (200 kHz) are solid (or narrow arches), but the

returns from the edges of the beam (50 kHz) are hollow (or wide

arches).

Using the Sonar Page

When combined with a GSD 21 Sounder Module, your GPSMAP

378/478 becomes a powerful ﬁshﬁnder/ﬂasher with the Sonar Page.

If a GSD 21 is attached, but the unit does not detect a transducer,

a “Sonar Turned Off” message appears across the Sonar Page. The

Sonar Page appears only if a GSD 21 has ever been attached or

when the unit is in Simulator Mode.

The middle of the page contains a right-to-left moving sonar image

of the water beneath your boat. Items appear as they pass under your

transducer. Those items on the right side of the screen are closer to

you than those on the left. Along the right side of the screen is an

adjustable scale that reﬂects the depth of the area being shown. The

top left corner shows the adjustment option, the depth, and the water

temperature.

The sonar display can also be set to show a split screen view of a

zoomed portion of the sonar, bottom lock (display scaled from the

bottom up), or a combination of these options. For example, you

can choose to show dual frequency at a 2X zoom (Dual 2X) on one

half and normal range dual frequency (Dual) on the other half. The

current display mode appears at the bottom of each sonar display.

Read the “Understanding Sonar ” section beginning on page 112 for

more on information about sonar.

Sonar Page

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Sonar Adjustment Options

Adjusting the Sonar Page

Use the Adjustment Menu to access the settings and features most

commonly used on the Sonar Page. Ten main adjustment options

are available: Range, Zoom, View, Gain, Target Level, Whiteline,

Frequency, Depth Line, Noise Reject, and Scroll. The currently

selected option appears in the upper-left corner.

To select an adjustment option:

Use one of the following methods to select an adjustment option:

•

Press the ROCKER right or left to scroll through the

adjustment options. When the adjustment option you want

appears, press ENTER.

Scroll—adjusts the rate that the sonar display scrolls from right to

left. If you are sitting still or the sonar display is moving too fast,

slow the scroll rate or pause the scrolling.

•

Press MENU, highlight Adjustments, and press ENTER.

Use the ROCKER to highlight the adjustment and press

ENTER.

Range—sets the display depth range used for viewing. The unit can

be set to automatically track the bottom or set to a user-speciﬁed

depth range.

After you select an adjustment option, press the ROCKER up or

down to change the setting.

Zoom—allows you to quickly select a display zoom scale or to

split the display. When a scale other than No Zoom is selected, the

Adjustment Menu shows a new selection labeled View or Span. The

Zoom function is divided into six levels:

You can also press MENU and highlight a shortcut setting to

quickly change to commonly used settings and values.

Press ENTER to accept the new setting (or press QUIT to cancel)

•

2X Split—shows two reduced-size sonar pictures at the same

time. The right half of the screen shows the complete sonar

picture at its original scale. The left half shows a portion of

the original picture at 1/2 depth scale.

and return to the Sonar Page.

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•

2X Zoom—shows the 2X zoomed picture on the full screen.

Target Level—adjusts colors used to show sonar information. A

Color Bar appears on the right side of the screen as you adjust this

setting. A higher percentage results in more strong-signaled colors

shown on the sonar display. A lower percentage results in more

weaker-signaled colors shown on the sonar display. This setting does

not increase or decrease the unit gain.

4X Split—shows two reduced pictures, the right at the

original depth scale and the left at 1/4 the original depth scale.

•

4X Zoom—shows the 4X zoomed picture on the full screen.

Btm (Bottom) Split—shows two reduced pictures, the right

at the original depth scale and the left showing sonar returns

from the bottom up. All target depths read as a distance from

the bottom.

Whiteline—controls how the unit shows information about the

bottom type (hard or soft). With Whiteline Off, the bottom return

shows as red. Set Whiteline at Normal or 1–100% to determine

bottom hardness. See page 114 for more information.

•

Btm (Bottom) Lock—shows returns from the bottom up on

the full screen.

Frequency—allows you to choose a transducer frequency.

Frequency refers to the “pitch” of the sound that the transducer

sends and receives.

TIP: Quickly zoom in and out of the Sonar display by pressing

the In and Out keys. Turn off the zoom function by pressing the

Out key until the No Zoom setting appears.

Depth Line—adds a horizontal depth line across the display that is

used to measure the depth of underwater objects. The depth of the

line appears in a box on the right side of the line. Press up or down

on the ROCKER to move the line on the sonar display.

View/Span—changes the viewing range of a zoomed display. If the

display is 2X or 4X split, only the zoomed portion on the left side of

the display is affected by the change. If the display is Bottom Split

or Bottom Lock, Span adjusts how far off the bottom the unit shows

data. This option is available when a Zoom scale other than No

Zoom is selected.

Noise Reject—helps ﬁlter unwanted noise from the sonar display.

The Noise Reject can be turned Off, set to Normal (automatically

adjusts for optimum viewing), or to a ﬁxed 1–100% setting. When

setting the Noise Reject, remember that a higher noise rejection

setting is less likely to show ﬁsh or structures.

Gain—allows you to control the sensitivity of the unit’s receiver.

To see more detail, increase the receiver sensitivity by selecting a

higher gain. If there is too much detail select a lower gain.

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Resizing the Split Screen

You can adjust the way the split screen appears. This option is only

available when a zoom scale other than No Zoom is selected.

Using the Pointer on the Sonar Page

You can show the pointer (arrow) to reference sonar items and

mark underwater waypoints. This makes it easier to ﬁnd and use

an object such as a stump for a future ﬁshing location. When using

this feature, the Sonar Page pauses. The depth continues to update

while the display is paused, but the unit does not show any new

sonar data until the Sonar Page resumes scrolling. You might see a

discontinuity from where the sonar information stops and where it

starts again.

To resize the Sonar Page split screen:

1. From the Sonar Page split screen, press MENU.

2. Highlight Size Split, and press ENTER.

3. Move the horizontal double-arrow left or right using the

ROCKER until the vertical width line shows, then press

ENTER.

To mark an underwater waypoint:

1. From the Sonar Page, press MENU, highlight Show Pointer,

and press ENTER.

4. If you want to cancel this operation, press QUIT or press

MENU, highlight Stop Resizing, and press ENTER.

2. Use the ROCKER to move the pointer to the location you

want to mark. Press ENTER. The New Map Waypoint Page

opens.

3. To change the name, symbol or depth, highlight the

appropriate ﬁeld, and press ENTER. Make your changes,

and press ENTER.

4. When you are done making changes, highlight OK, and

press ENTER.

5. To return to the standard Sonar Page, press QUIT; or press

MENU, highlight Hide Pointer, and press ENTER.

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Depth Number—select the efﬁciency of the digital depth update

rate. Fast Update updates quicker and is recommended for low-

noise water deeper than 50 feet. Auto is best for shallow water or

high-noise areas, has a slower screen update, and is best used if you

travel a wide variety of depths.

Setting Up Sonar

Use the Sonar tab on the Main Menu to set up the Sonar Page.

To access the Sonar Tab:

Highlight the Sonar tab on the Main Menu.

If the unit is unable to track the bottom for any reason, the digits in

the depth window ﬂash on and off to alert you that the unit is not

tracking the bottom.

Map Split Sonar Detail—select how much detail appears on the

Map Page with the sonar shown. Full Range shows data using the

Range setting of the Sonar Page, regardless of Zoom or Bottom

Lock. Maximum Detail shows any Zoom or Bottom Lock data

from the Sonar Page.

Main Menu—Sonar Tab

Keel Offset—enter the surface reading for the depth of a keel. This

makes it possible to measure depth from the bottom of your keel

instead of from the transducer’s location. Enter a positive number

to offset for a keel. It is also possible to enter a negative number to

compensate for a large vessel that can draw several feet of water.

The Keel Offset is reﬂected in the depth reading.

Fish Symbols—select how the Sonar Page shows underwater targets

and background information. Select Off to show all of the available

information about the underwater environment. Select a ﬁsh symbol

to show only the information related to that symbol.

Water Type—select the proper water type you are boating in.

Because sound waves travel through fresh and salt water at different

rates, it is necessary to select the water type to ensure accurate

readings on the unit.

Transducer—select the type of transducer that you are using. If you

are using a speed-capable transducer/sensor, select Temp, Spd.

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Calibrating the Water Speed

If you select Temp, Spd for the Transducer option on the Setup sub

tab, you must calibrate the water speed to ensure the Water Speed

shown on your unit is accurate. The calibration should take place in

water having little or no current.

The unit automatically uses the GPS ground speed, if it is available,

for comparison on the calibration. If a GPS ground speed is not

available, use either your boat’s speedometer reading (not always

accurate) or a stopwatch to determine your speed over a certain

distance. To ﬁnd out your speed, divide the distance by the time.

Calibrating the Water Speed

3. By default, the top ground speed is automatically shown. If

a ground speed is not available, the top uncalibrated water

speed is used instead. If the new speed is correct, highlight

OK, and press ENTER.

To calibrate the water speed:

1. On the Setup sub tab of the Sonar tab, highlight the

If you want to manually enter a calibration, press ENTER

while the speed is highlighted, enter a new speed, and press

ENTER again.

Calibrate Water Speed button, and press ENTER.

2. Bring the boat to a cruising speed. Both the top ground and

uncalibrated water speeds are shown at the bottom of the

calibration window. Note your top speed, then stop the boat,

and press ENTER.

If the boat is not moving fast enough or the speed sensor is not

outputting a speed, “Boat Is Not Moving Fast Enough To Calibrate”

appears at the bottom of the screen. Check that the speed sensor

wheel is moving or safely increase boat speed. If there is a problem

with the speed sensor or if a speed sensor is not installed, “Water

Speed Sensor Is Not Working” appears at the bottom of the screen.

Check connections of speed sensor cables.

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Flasher—select On to show a graphic ﬂasher representation on

the far right side of the sonar display. This graphic ﬂasher shows

structure and bottom returns much the same as a true ﬂasher. You

might ﬁnd this feature useful when using ﬁsh symbols.

Setting Up the Sonar Display

You can set up how the sonar information appears on-screen using

the Display sub tab.

To access the Display sub tab:

1. Highlight the Sonar tab on the Main Menu.

Temperature Graph—select On to show a temperature graph along

the bottom of the Sonar Page.

2. Highlight the Display sub tab.

Background Color—select the color for the Sonar Page and the

sonar on the Map Split Page.

Graphic ﬂasher

Whꢀte

Color bar

background

Display Sub Tab

Temperature

Depth scale

ꢀn corners

Scale—select how and where you want the depth scale to appear.

graph

Color Bar—select On to show a gradient scale of the current Target

Level setting on the Sonar Page.

Sonar Page with the Sonar Display Settings Changed

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Viewing the Temperature

Changing the Temperature Display

The graph will adjust and show the temperature changes according

to the Temperature Scale and Time Duration settings.

Use the Temperature sub tab to view a graph of water temperature

changes over a period of time. The graph reads from right to left

so that the most recent temperature measured appears on the far

right side of the graph. The dotted lines within the graph indicate

intervals in the temperature scale and the duration of time. To view

temperature information, you must select Temp or Temp, Spd as

the transducer type on the Setup sub tab.

Temperature Scale—select a degree span from the list. Select Auto

to have the unit automatically determine the best range, or select a

span of 2, 4, 6, 8, or 10 degrees.

Time Duration—set how fast or slow the temperature log scrolls; a

shorter time duration means a faster temperature log scroll. Select a

duration from 1 minute to 2.5 hours.

NOTE: You must be receiving proper sonar data from another

device, such as Garmin GSD 21 Sounder Module, to view

temperature information.

Resetting the Temperature Graph

To reset the scale range for the temperature graph, press MENU,

highlight Reset Auto Scale, and press ENTER. This is useful

when the scale spans a large range due to extreme temperature

changes. You can reset the scale only when you select Auto for the

Temperature Scale.

To access the Temperature sub tab:

1. Highlight the Sonar tab on the Main Menu.

2. Select the Temperature sub tab.

To restore the temperature graph to defaults, press MENU, highlight

Restore Default, and press ENTER.

Temperature Sub Tab

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Understanding the Sonar Display

Understanding Sonar

One of the ﬁrst things to understand about sonar is that the

transducer sends a beam down to the bottom of the water, much like

the beam of a ﬂashlight. The beam starts small near your vessel and

expands as it gets to the bottom. See “Transducer Coverage ” for

more detailed information.

The transducer mounted on your vessel transmits sound waves

toward the bottom of the water in a cone-shaped pattern. When

a transmitted sound wave strikes an underwater object—such as

the bottom, a structure, or a ﬁsh—sound is reﬂected back to the

transducer. The transducer collects the reﬂected sound waves and

sends the data to the GSD 21 Sounder Module and then to the

GPSMAP 378/478 to be processed and shown. The underwater data

is shown on the Sonar display in the order that it is returned; ﬁrst

returned is the ﬁrst on the display.

The Sonar Page does not show a three-dimensional representation of

the underwater environment; the display is in two-dimensions, much

like if you took a picture of an aquarium. Only the depth of the item

in the water appears. The Sonar display does not show you where an

item is located horizontally in the water, as shown in the drawings

below. The ﬁsh is not directly above the tree in reality, but it might

look like it is on the Sonar Page.

Fꢀsh

Sonar Page

Generally speaking, if the only thing between the transducer and

the bottom is water, the ﬁrst strong return comes from the bottom

directly below the transducer and sets the bottom level. Weaker

secondary returns provide the detailed data. Stronger returns appear

in darker colors, with red being the strongest return.

10'

Tree

20'

Aerial View of the Water

Sonar Display

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Transducer Coverage

The area covered by the transmitted sound waves is determined

by the cone angle of the transducer and the water depth. The wide

cone angles (40°) associated with low frequencies (50 kHz) provide

a large coverage area for ﬁnding ﬁsh within a coverage width that

is approximately 2/3 of the water depth. However, this also means

that wide cone angles produce less bottom detail and resolution. As

shown in the drawing on the near right, the 40° cone angle produces

a coverage area of approximately a 20-foot diameter circle at a

30-foot depth.

Coverage

dꢀameter

Depth

Coverage

dꢀameter

Depth

The narrow cone angles (10°) associated with high frequencies

(200 kHz) provide better bottom resolution and crisper detail, but

cannot show a large coverage area for ﬁnding ﬁsh. The 10° cone

angle provides a coverage width that is approximately 2/10 of the

water depth. As shown in the drawing on the far right, the 10° cone

angle produces a coverage area of approximately a 6-foot diameter

circle at a 30-foot depth.

40° Cone Angle (50 kHz)

10° Cone Angle (200 kHz)

Dual frequency mode combines both frequencies to get the best

coverage area and contour/depth readings.

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Whiteline

Thermoclines

The GSD 21 Sounder Module can help you determine whether the

bottom is hard or soft. When the sonar sound waves are reﬂected

back by the bottom, a hard bottom returns a stronger signal than a

soft bottom. A thin whiteline indicates a softer bottom, while a thick

whiteline indicates a harder bottom. Normally, a red line is used

to show the point where water meets the bottom. This line follows

the bottom contour, along with any signiﬁcant objects lying on the

bottom. The unit uses the whiteline function to make the bottom

layer information easier to distinguish.

A rough deﬁnition of a thermocline is a break in water where

the water temperature changes faster than the water above it.

Thermoclines are shown as the weakest colors.

One of the unique features offered by Garmin is See-Thru^®

technology, which allows the GPSMAP 378/478 to hear both weak

and strong signals simultaneously so it can identify ﬁsh returns

under the toughest conditions, such as suspended in thermoclines or

even hiding near structures. See-Thru^®technology allows the

GSD 21 to “see” through thermoclines and helps locate ﬁsh where

they live.

Thꢀck

Whiteline: Hard

bottom

Thermoclꢀne

Whiteline On

Whiteline Off

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APPendIX > sPecIfIcAtIons

Performance

Receiver:

aPPendIX

Differential-ready 12 parallel channel receiver

Acquisition Times: Approximately 15 seconds (warm start)

Approximately 45 seconds (cold start)

Approximately 5 minutes (First Time/

AutoLocate™)

Speciﬁcations

Physical Speciﬁcations

Size:

5.7" W x 3.2" H x 1.9" D

(14.5 x 8.1 x 4.8 cm)

Update Rate:

1/second, continuous

Weight:

Display:

14.0 oz (0.40 kg)

Accuracy

3.75" diagonal (9.5 cm) Transﬂective, 256-color

GPS:

15 meters (49 feet) RMS 95% typical

3–5 meters (10–16 ft), 95% typical

display with backlighting (480 x 320 pixels)

DGPS (USCG):

DGPS (WAAS):

Case:

Fully gasketed, high-impact plastic alloy,

waterproof to IEC 60529 IPX7

< 3 meters (10 ft) 95% typical with DGPS

corrections

Temp. Range:

5°F to 140°F (-15°C to 60°C)

Velocity:

0.1 knot RMS steady state

6 g's

Power

Battery:

Dynamics:

Rechargeable lithium-ion

Battery Life:

4 to 15 hours depending on the backlight setting

and if you are using XM WX Weather or

XM Radio the entire time.

Source:

Fuse:

11–35 VDC

3AG - 1.5 Amp

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APPendIX > oPtIonAl AccessorIes

PC Interface Cable: Connects the unit to a serial port on your computer.

Optional Accessories

Power/Data Cable: Allows you to connect the unit to the electrical system

using bare wires.

In addition to the standard accessories included with your GPSMAP

378/478, several optional accessories are available to enhance the

operation of the GPSMAP 378/478.

Programmable Data Cards: Blank data cards available in 16 MB, 32 MB,

64 MB, 128 MB, 256 MB, and 512 MB sizes. Download detailed map data

from MapSource CD-ROMs to a data card, either directly through your

GPSMAP 378/478 using the PC USB cable, the optional PC Interface cable, or

with the optional USB Data Card Programmer.

To obtain replacement parts and optional accessories, contact

your Garmin Dealer, Garmin Product Support in the U.S.A. at

800/800.1020, or Garmin Europe at 44/0870.8501241.

USB Data Card Programmer: Programs blank data cards at high speed

through a computer.

WARNING: Garmin accessories have been designed and

speciﬁcally tested for use with Garmin products. Accessories

offered by other manufacturers have not been tested or approved

for use with Garmin products. Use of such accessories could

cause damage to the GPSMAP 378/478 and void the warranty.

Carrying Case: Protects the GPSMAP 378/478 when not in use; has storage

space for data cards.

Protective Cover: Snaps on the front of the unit to protect the screen from

damage.

GA 29, GA 29F, and GA 26C Antennas: Garmin remote antennas.

GXM 30: The XM antenna. See page 137 for subscription information.

Non-Skid Friction Mount: Portable vehicle mount, no installation required.

MapSource Software CD-ROMs: Enhances the basemap and creates

waypoints and routes from your computer. MapSource offers several

detailed mapping options that are compatible with the GPSMAP

378/478. See www.garmin.com for more information

Permanent and Temporary Adhesive Disks: Adhesive disks for using the unit

in a vehicle.

Pre-Programmed Data Cards: Data cards preprogrammed with BlueChart g2

or US Inland Lakes map data.

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APPendIX > InstAllAtIon InforMAtIon

Ground

Black

Data Out

Blue

Voꢀce (-)

Orange

Installation Information

This section of the Appendix provides information on connecting the

GPSMAP 378/478 to auxiliary devices and removing the antenna.

Alarm

Whꢀte

Power

Red

Voꢀce (+)

Brown

Data In

Yellow

Connecting the Power/Data Cable

The power/data cable connects the GPSMAP 378/478 to an 11–35

VDC system and provides interface capabilities for connecting

external devices. The color code in the diagram below and to the

right indicates the appropriate harness connections. Replacement

fuse is a 3AG - 1.5 Amp fuse.

Power/Data Connector on the Cable

Ground

Black

Voꢀce (-)

Orange

Data Out

Blue

Alarm

Whꢀte

Red: Power

Voꢀce (+)

Brown

Power

Red

Black:

Ground

(-)

(+)

11–35 VDC

Data In

Yellow

RXD +

Autopilot/

NMEA Device

RXD -

Blue:

Data Out

Power/Data Connector on the GPSMAP 378/478 Unit

(+)

Switch

White/Blue

Orange

Closed - On,

Open - Off

GSD 21

Sounder

Yellow:

Data In

(-)

White/Brown

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APPendIX > InstAllAtIon InforMAtIon

Connecting the Optional GXM 30 Antenna

Connect the optional GXM 30 antenna to the GPSMAP 378/478

to access XM WX satellite weather and XM Radio. For more

information about the GXM 30 antenna, see the GXM 30 Owner’s

Manual.

NOTE: You must subscribe to XM Radio and/or XM WX

Satellite Weather to use the XM Radio and/or XM Weather

features on your GPSMAP 378/478.

To connect the GXM 30 antenna:

1. Position the antenna where it has a clear view of the sky.

This can be on the outside of the vehicle or behind the

windscreen.

2. Plug the GXM 30 cable into the USB port on the back of the

unit, as shown in the following illustrations.

GXM 30 Antenna Plugged In

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APPendIX > InstAllAtIon InforMAtIon

To connect your GPS to your computer:

Connecting Your GPSMAP 378/478 to a Computer

You can connect your GPSMAP 378/478 to your computer using

the supplied USB cable to connect to a USB data port or the

PC Interface cable to connect to a DB-9 serial communications port.

1. Connect the small end of your cable to the lower connector

on the back of the GPSMAP 378/478, shown in the

illustration to the left.

2. When using the supplied USB Data Cable, connect the larger

end of the cable to an available USB data port (see the

illustration on the left).

NOTE: Fully install the supplied MapSource program, Trip &

Waypoint Manager, on your computer before connecting the

USB cable to the computer.

When using a PC Interface Cable, connect the larger end of

the cable to a serial communications port on your computer

(see illustration on the bottom left).

Information About USB Drivers

The USB drivers should have been automatically installed

when you installed the MapSource program that came with

your GPSMAP 378/478. When you initially connect the

GPSMAP 378/478 to a USB port, your computer might prompt

you to locate the destination of the drivers for the device. You only

need to install the drivers once. After the drivers are installed, your

computer will always detect your GPSMAP 378/478 when it is

connected. USB drivers might be updated periodically. You can ﬁnd

these updates at www.garmin.com.

USB connector/

USB Data Port on Your PC

GXM 30

Antenna

connector under

weather cap

Serial Communications Port

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APPendIX > InstAllAtIon InforMAtIon

To install a data card:

1. Insert the card into the slot on the bottom of the unit. Be sure

Using xImage for Customized Waypoint Icons

Use xImage to exchange images between your computer and your

GPSMAP 378/478. You can download and save screenshots of any

screen shown on your unit. xImage also allows you to download

customizable splash screens and waypoint symbols from compatible

GPS units, customize them (if you have an image editing program

on your computer), and send them back to your GPS unit.

the label is facing the front of the unit.

2. Firmly push the card into the unit. It is not necessary to force

the card. The handle is still exposed when it is properly

inserted.

3. If the unit is on, a conﬁrmation tone sounds. The ﬁrst time

you insert a programmed data card, the unit takes a few

seconds to read the card. Once the data card has been

properly installed and accepted, a summary screen noting

the card details appears. Press ENTER to acknowledge.

You can download xImage from the Garmin Web site at

www.garmin.com/ximage/. See the Help ﬁle for complete

instructions about using xImage.

If you insert a data card and get a card format not recognized

message, try removing the card and reinserting it. If the card is still

not recognized, contact Garmin or your Garmin dealer.

Installing and Removing Data Cards

The GPSMAP 378/478 uses an optional Garmin data card to show

digital charts and maps. Install the data card in the card slot located

on the bottom of the unit. Install or remove the data card at any time,

whether the unit is on or off.

To remove a data card:

1. Grasp the card handle. The handle expands for easy

removal.

You can load a variety of information on your data card, such as

MapSource detailed maps. You can also buy preprogrammed cards

to use with your GPSMAP 378/478.

2. Pull the card out of the card slot on the bottom of the unit.

3. If the unit is on, a conﬁrmation tone sounds when the data

card has been removed.

Data cards are not waterproof, should not be exposed to moisture or

excessive static charges, and should be stored in the case supplied

with the card.

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APPendIX > InstAllAtIon InforMAtIon

To remove the GPS antenna:

1. Remove the external power cable from the connector on the

Interfacing

The following formats are supported for connection of external

devices: GARMIN proprietary Differential GPS (DGPS), NMEA

0180, 0182, 0183 (versions 1.5, 2.0, 2.3, 3.01), ASCII Text Output,

and RTCM SC-104 input (version 2.0).

back of the GPSMAP 378/478.

2. Rotate the antenna to approximately a seven o’clock

position. The alignment notches in the casing must line up

with the notches on the antenna.

The following are the Approved Sentences for NMEA 0183,

version 3.01 output: GPRMC, GPGGA, GPGSA, GPGSV, GPGLL,

GPBOD, GPRTE, and GPWPL. The following are the Proprietary

Sentences for NMEA 0183, version 3.01 output: PGRME, PGRMZ,

and PGRMM.

3. Pull the antenna away from the GPSMAP 378/478 unit.

The GPSMAP 378/478 also includes NMEA input with support for

the BWC, DBT, DPT, DSC, DSE, MTW, VHW, VTG, and XTE

sentences.

Garmin’s proprietary communication protocol is available from the

Web site (www.garmin.com).

Removing the GPS Antenna

You can remove the GPS antenna to use an external antenna. After

the antenna is removed, the BNC connector is exposed and ready

for use with an external antenna. For information on connecting an

external antenna to the GPSMAP 378/478, refer to the installation

instructions that came with the antenna.

Removing the GPS Antenna

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APPendIX > sAtellIte InforMAtIon

Date, Time, and Current Location

Satellite Information

The unit gets date and time information from the satellite’s on-board atomic

clock. When the unit has achieved a 2-D or 3-D GPS location, the current

location is shown in the location format you have selected.

Center dot - 90°

above the horizon

90°

Inner ring- 45°

above the horizon

What is Differential GPS (DGPS)?

Outer ring -

the horizon

The United States and Canadian governments (among others) have set up

Differential GPS (DGPS) stations to transmit correction signals. They are

operational in coastal areas and on many navigable river systems.

45°

The DGPS system is available for use without a fee, but you do need

additional equipment to receive DGPS signals; a beacon receiver

compatible with the RTCM format sentences supported by your Garmin

GPS is needed to use DGPS.

Satellite Sky View

Satellite Location

The location of each available satellite is shown over two location rings

on the Satellite Information Page. The outer ring represents the horizon,

the inner ring represents 45° above the horizon, and the center represents

directly overhead. When the unit is using a satellite for navigation, the

satellite number is highlighted on the location rings. The unit can show

satellite location with North or your current track at the top of the display.

Refer to the United States Coast Guard’s Web site (www.navcen.uscg.gov/)

for locations and status of the differential stations

Differential Field

Differential receiver status is indicated in the bottom left ﬁeld of the GPS

tab and will show one of the following conditions:

Satellite Strength Indicator Bars

The Satellite Strength Indicator Bars show the strength of the signal being

received and the status of the signal. The bars are either shaded or ﬁlled. A

hollow gray bar means the unit is in the process of storing orbital data it is

receiving from the satellite signal. When the bar turns solid green, the unit

is using the satellite signal for navigation. A “D” in or above the bar means

differential corrections (WAAS or DGPS) are being applied to that satellite.

•

None—no optional beacon receiver is attached or enabled in

the Interface sub tab on the Main Menu—Setup tab or WAAS

is disabled.

Searching for WAAS—WAAS is enabled and the receiver is

searching for WAAS signal.

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APPendIX > sAtellIte InforMAtIon

•

Using WAAS—WAAS capability is enabled and the unit is

receiving WAAS corrections.

According to the FAA’s Web site, testing in September 2002, WAAS

conﬁrmed an accuracy performance of 1–2 meters horizontal and

2–3 meters vertical throughout the majority of the continental

United States and portions of Alaska.

Check Beacon Wiring—the DGPS setting is enabled in the

Interface sub tab on the Main Menu—Setup tab but no DGPS

device is detected.

WAAS is just one service provider that adheres to the Minimum

Operational Performance Standard (MOPS) for global Satellite

Based Augmentation Systems (SBAS). Eventually, there will

be several services of worldwide geostationary communication

satellites and ground reference stations.

•

No Beacon Signal—DGPS receiver is attached, but not

transmitting RTCM data to GPS.

Tuning Beacon—the receiver is tuning manually to a DGPS

frequency.

•

Using Differential—the unit is receiving DGPS corrections.

All SBAS systems use the same receiver frequency; therefore any

operational SBAS system should be capable of providing your GPS

unit with increased accuracy at any location in the world.

Scanning for Beacon—the DGPS receiver is scanning for an

available frequency.

Currently, enabling WAAS on your Garmin GPSMAP 378/478 in

regions that are not supported by ground stations might not improve

accuracy, even when receiving signals from an SBAS satellite. In

fact, it can degrade the accuracy to less than that provided by GPS

satellites alone. For this reason, when you enable WAAS on your

Garmin GPS receiver, the receiver automatically uses the method

that achieves the best accuracy. To enable WAAS, see page 6.

What is WAAS/EGNOS?

The Wide Area Augmentation System (WAAS) is an FAA-funded

service to improve the overall integrity of the GPS signal and

increase position accuracy for users in North America. In Europe,

WAAS is referred to as EGNOS.

The system is made up of satellites and approximately 25 ground

reference stations positioned across the United States that monitor

GPS satellite data. Two master stations, located on either coast,

collect data from the reference stations and create a GPS data

correction message.

For more information, go to http://gps.faa.gov.

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APPendIX > lorAn td setuP

Using the LORAN TD Format

LORAN TD Setup

When creating new waypoints using LORAN TD coordinates, you

must set the correct LORAN chain number and secondary stations in

the Setup TD ﬁeld before storing the waypoint. After the waypoint

is stored in the unit’s memory, it will always reference the LORAN

chain number and secondary stations currently selected in the

Setup TD ﬁeld. If you enter a different LORAN chain number or

change the secondary stations or offsets in the Setup TD ﬁeld, the

active waypoint information will reﬂect those changes. Because

the GPSMAP 378/478 does not rely on the LORAN signal for

navigation, it can reference a different GRI chain and/or secondary

stations and still navigate to the location stored in memory.

LORAN C is a radio navigation aid operated and maintained in the

United States by the United States Coast Guard. LORAN

(LOng RAnge Navigation) system covers the entire United States

and the U.S. Coastal Conﬂuence Zone. From the perspective of a

mariner, the system is used for ocean and coastal navigation. It can

be used as a supplemental system for harbor and harbor approach

navigation, and it is used for inland navigation by recreational

vehicles.

LORAN TD Feature

The LORAN TD (Time Delay) feature eases the transition from

using LORAN to using GPS. The GPSMAP unit automatically

converts GPS coordinates to LORAN TDs for those who have a

collection of LORAN ﬁxes for favorite ﬁshing spots and other

waypoints recorded as TDs. You can show your location as a TD

or enter waypoints as TDs. The accuracy to be expected from this

conversion is approximately 30 meters. When the unit is placed

in the LORAN TD format mode, it simulates the operation of a

LORAN receiver. Position coordinates might be shown as TDs,

and all navigation functions can be used as if the unit was actually

receiving LORAN signals.

The LORAN Location Format ﬁeld is located on the Location sub

tab of the Setup tab on the Main Menu. The LORAN TD Setup

window contains the ﬁelds to select the Loran GRI-Chain Number,

Primary and Secondary Stations, and TD Offsets.

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APPendIX > lorAn td setuP

To set up Loran TD from the Main Menu:

1. Highlight the Setup tab on the Main Menu, and then highlight

the Location sub tab.

2. Highlight the Location Format ﬁeld and press ENTER.

LORAN TD Setup

6. When ﬁnished, highlight the Save button, and press ENTER.

If the active GRI Chain, secondary stations, or offsets were changed

since the waypoint was created, the waypoint now references

the active GRI chain and secondary stations and adjusts the TD

coordinates accordingly. Remember that the GPS is not relying

on the LORAN signal for navigation and actually converts the

TD coordinate to a useful latitude and longitude coordinate before

storing the waypoint to memory or using it for navigation. Because

of this, the unit can navigate to a TD coordinate anywhere in the

world.

Location Sub Tab

3. Highlight Loran TD, and press ENTER.

4. Highlight the Setup button located on the right side of the

Location Format ﬁeld and press ENTER. The Loran TD

Setup window appears.

5. To change the settings of any of the ﬁve ﬁelds, highlight

the ﬁeld, press ENTER, select a setting, and press ENTER

again.

For more information on LORAN TDs, you can download the

LORAN TD Position Format Handbook from the Garmin Web site.

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APPendIX > MAP dAtuMs And locAtIon forMAts

If you are navigating and comparing the GPS coordinates to a map,

chart, or other reference, set the map datum in the GPS unit to the

same datum as the map to ensure the most accurate navigation.

Map Datums and Location Formats

What is a Location Format?

Your current location can be viewed on the GPS in the form of

coordinates. Because different maps and charts use different

location formats, Garmin GPS units allow you to choose the correct

coordinate system for the type of map you are using. The most

common format is latitude and longitude, which is used by all

Garmin units.

Map Datums are based on a mathematical model of the Earth.

You can choose to change the location format to use with other

coordinate systems in the Location ﬁeld of the Setup tab—Location

sub tab. UTM/UPS (Universal Transverse Mercator/Universal Polar

Stereographic) are easy-to-use metric grids that are found on most

USGS topographic quadrangle maps. You can also select one of

several other grids, including a user-deﬁnable grid (for the advanced

user).

What Are a Map Datums?

A datum is a mathematical model of the Earth that approximates

the shape of the Earth and enables calculations to be carried out in a

consistent and accurate manner. The datum is physically represented

by a framework of ground monuments whose positions have been

accurately measured and calculated on this reference surface. Lines

of latitude and longitude on a map or chart are referenced to a

speciﬁc map datum. Every chart has a map datum reference, and you

can set the GPSMAP 378/478 to match most of those commonly

used.

For more information about using paper maps with your

Garmin unit, refer to Using a Garmin GPS with Paper Land

Maps, available for download at www.garmin.com/manuals/

UsingaGarminGPSwithPaperLandMaps_Manual.pdf.

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APPendIX > dIgItAl selectIve cAllIng (dsc)

Any time a vessel receives a DSC call, the vessel can store that

location and quickly navigate to that position using a Go To. This

makes DSC a time-saver, especially in an emergency situation. To

use DSC, users must ﬁrst register their VHF radio with the FCC and

receive a Maritime Mobile Service Identity (MMSI) number.

Digital Selective Calling (DSC)

DSC uses marine VHF radio GPS technologies to transmit and

receive location information. DSC is used by mariners to assist them

in two major areas: distress calls and position reporting.

A non-emergency DSC position report allows mariners to exchange

and show the positions of one another. When you receive a DSC

position, you can create a waypoint or to show the received position

on an electronic map.

What is a Maritime Mobile Service Identity (MMSI)

Number?

MMSI basically allows a VHF radio to act like a phone. The 9-digit

MMSI number acts like a phone number when used in a position

report and as a unique identiﬁer to the Coast Guard when used in

an emergency distress call. To obtain a MMSI number, users must

not supply this number!

An emergency DSC Distress Call allows a vessel in trouble

to transmit a substantial amount of information in a single

transmission, or “call,” without the need for voice communication.

When any nearby rescuer receives the DSC signal, an alarm sounds,

and they immediately receive the position of the caller.

For more information regarding MMSI numbers, visit

www.navcen.uscg.gov/marcomms/gmdss/mmsi.htm.

The rescuer can then choose to navigate (Go To) the caller’s position

to assist or forward the call on to the Coast Guard. When the Coast

Guard receives the call, they can immediately access the caller’s

information (such as who they are and the type of vessel) in their

database while they are in transit to the caller’s location.

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APPendIX > dIgItAl selectIve cAllIng (dsc)

Users Outside the United States

How Are MMSI Assignments Obtained?

Users can obtain an MMSI assignment from their telecommunications

authority or ship registry, often by obtaining or amending their ship

station license.

Non-commercial users, such as recreational users, who remain

in United States waters and only carry VHF, EPIRB (Emergency

Position Indicating Radio Beacons), and Radar are not required to

have a FCC ship station license. The FCC and Coast Guard have

authorized some second and third-party vendors to assign MMSI

numbers. This service is limited to registering recreational vessels

only. To receive information on how to obtain a recreational MMSI

number, contact http://www.uscg.mil/rescue21/links/mmsi.htm or

http://wireless.fcc.gov/marine/.

Users In Canada

Industry Canada is responsible for assigning MMSI numbers to

commercial and recreational vessels. Information is available at the

following Web site: http://apollo.ic.gc.ca/english/mmsi.html.

How Can Garmin Help You with DSC?

To receive distress calls or position reports, you must have a

DSC-equipped chartplotter as well as a VHF radio with DSC

support. During normal, non-emergency position report

communication, Channel 70 (156.525 MHz) has been set aside as

the VHF/DSC digital call channel.

Non-Federal Users in the United States

Commercial users, or those who travel outside the United States or

Canada, must apply for a ship station license or an amendment to a

ship station license. To ﬁnd out if you require a Ship Station license,

visit http://wireless.fcc.gov/marine/fctsht14.html. If your vessel

requires licensing by the FCC, you can obtain a MMSI during the

application/licensing process when you ﬁle FCC Forms 159 and

605.

For a distress call, press the MayDay button on the VHF radio. The

call transmits on an emergency channel with the MMSI number

attached to the call, if the receiver has DSC support. Any DSC-

equipped mariner (on sea or land) within range can receive the call.

Federal Users in the United States

When the GPSMAP 378/478 is connected to a VHF with DSC

support, the GPS unit shows a call list, log, and a directory. Basic

wiring is required for the Garmin unit and VHF radio to send and

receive NMEA data from each other.

Federal users can obtain MMSI assignments from their agency

radio spectrum management ofﬁce. These procedures are currently

under review by the National Telecommunications and Information

Administration (NTIA).

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APPendIX > MessAges

Drift Alarm—the water depth has changed by the amount entered in the Drift

Alarm setup.

Messages

Accuracy Alarm—the GPS accuracy has fallen outside of user-set value.

Fish Alarm—a ﬁsh was detected. The unit shows an icon and beeps (if

enabled). This alarm does not show a message banner.

Alarm Clock—the alarm clock has sounded.

Antenna Shorted to Ground—the external GPS antenna has an electrical

connection problem. Contact Garmin Product Support.

Flash Flood Warning—a ﬂash ﬂood warning was issued for the area by the

National Weather Service.

Approaching Turn—you are nearing a turn in a route.

Arriving at Destination—you are nearing your destination.

Batteries Low—the battery needs to be recharged.

Flood Warning—a ﬂood warning was issued for the area by the National

Weather Service.

Lost Satellite Reception—the unit is unable to receive satellite signals.

Basemap Failed Unit Needs Repair—there is an internal problem with your

unit. Contact Garmin Product Support to have the unit serviced.

Marine Warning—a marine warning was issued by the National Weather

Service.

Boat Is Not Moving Fast Enough to Calibrate—the boat is not moving fast

enough for the speed wheel to provide a valid speed.

Memory Full—unit memory is full, no further data can be saved.

Memory (RAM) Failed Unit Needs Repair—there is an internal problem

with your unit. Contact Garmin Product Support to have the unit serviced.

Can’t Unlock Maps—no applicable unlock code for one or more maps was

found. All MapSource maps are not accessible.

Memory (ROM) Failed Unit Needs Repair—there is an internal problem

with your unit. Contact Garmin Product Support to have the unit serviced.

Check XM Antenna—internal problem with your GXM 30 antenna. Contact

Garmin Product Support.

Near Proximity Point—you have reached the distance set for a proximity

waypoint.

Database Error—internal problem with the unit. Contact your dealer or

Garmin Product Support to have the unit repaired.

NMEA Depth is Below Transducer—no keel offset value has been received

from the external sonar device.

Deep Water—the water is deeper than the amount set in the Deep Water

Alarm.

No Diff GPS Location—RTCM is selected but the unit is not receiving DGPS

data.

Detail Maps Don’t Support Routing—maps that are loaded on the data card

do not support automatic route calculation.

No Roads Near Destination—the destination for the road route you tried to

calculate is not near any roads. Select a different destination.

Distress Call—a DSC distress call was received. Take appropriate action.

Dragging Anchor—the distance set in the Anchor Drag Alarm was exceeded.

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APPendIX > MessAges

No Roads Near Starting Point—the start location for the road route you tried

to calculate is not near any roads. Select a different start location.

Thunderstorm Warning—a severe thunderstorm warning was issued for the

area by the National Weather Service.

No DGPS Position—no differential connection data is available, or not enough

data is available to calculate a DGPS position.

Tornado Warning—a tornado warning was issued for the area by the National

Weather Service.

No Tide Stations for that Area—no tide stations within 100 miles of the area.

No XM Signal—the GXM 30 antenna is not receiving an XM signal.

None Found—no data matched the search criteria.

Track Already Exists—a saved track with the same name already exists.

Track Log Full—the track log is full and track recording was turned off.

To record more track points, you need to clear the track log and turn track

recording on.

Off Course—you are off course by the distance set in the Off Course Alarm.

Proximity Memory Full—no additional proximity waypoints can be saved.

Proximity Radius Overlaps—the radius of two proximity waypoints overlap.

Route Already Exists—you have entered a route name that already exists.

Route Calculation Error—no route can be calculated.

Track Memory Full—no more track data can be stored. Delete the old track

data to store the new data.

Track Truncated—a complete uploaded track will not ﬁt in memory. The

oldest track log points have been deleted.

Transducer Disconnected, Sonar Turned Off—the unit has no transducer

attached, has a bad cable/transducer, or has a disconnected transducer cable.

Route Memory Full—no additional routes can be saved.

Transfer Complete—data transfer was completed.

Route Truncated—uploaded route from another device has more than 300

waypoints.

USB Connected—the USB cable was recently plugged in.

User Timer Expired—the Timer Alarm value has counted down to zero.

Route Waypoint Memory Full—no additional route waypoints can be saved.

Water Speed Sensor is Not Working—the speed sensor is not detected. Check

the connections.

Saving XM Program Information—an XM Radio channel lineup change has

occurred and the unit is saving the channel lineup to memory.

Water Temperature Alarm—sonar has reported a temperature above, below,

inside, or outside the speciﬁed value(s).

Shallow Water—the water is shallower than the amount set in the Shallow

Water Alarm.

Waypoint Already Exists—a waypoint with the same name already exists.

Sonar Failed Unit Needs Repair—there is an internal problem with the unit.

Contact Garmin Product Support to have the unit serviced.

Waypoint Memory Full—the unit has stored the maximum number of

waypoints.

Sunrise, Switching to Day Mode—the unit is switching to Day Mode.

Sunset, Switching to Night Mode—the unit is switching to Night Mode.

XM Connected—the GXM 30 antenna was recently plugged in.

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APPendIX > dAtA fIeld oPtIons

Elevation—the altitude (height) above or below mean sea level (MSL).

GPS Status—the current status of the GPS receiver, such as “3D GPS.”

Location (Lat/Lon)—your current location as latitude/longitude coordinates.

Data Field Options

The following list provides a brief description of each data ﬁeld

option. Some of these options are supported only by devices

interfaced to your GPSMAP 378/478.

Location (Selected)—your current location described in the selected units of

measure (other than lat/lon).

Accuracy—the current accuracy of your GPS-determined location.

Max Speed—the maximum speed the unit has moved since last reset.

Mov Avg Spd—see Trip Avg. Speed (Moving).

Move Timer—see Trip Timer (Moving)

Battery Timer—the time remaining on the battery before it is fully discharged.

Bearing—the compass direction from your current location to a destination.

Course—the desired path of travel from your starting location to a destination.

Next Course—the course your route will take you on after you reach the next

waypoint.

Course to Steer—the recommended direction to steer in order to reduce cross-

track error and return to the course line. Shown as Steer.

Next Turn—the direction of the next turn on an active route.

Next Wpt—see Waypoint (Next).

Cross Track—the distance you are off a desired course in either direction, left

or right.

Depth (Marine Only)—the depth of water from sonar NMEA input.

Dest Wpt—see Waypoint (Destination).

Odometer—the total distance traveled since the odometer was reset.

Pointer—the arrow indicating the direction to travel to the next point on a

route.

Distance (Destination)—the entire distance of a route, from beginning to end.

Distance (Next)—the distance to the next point on a route.

Power—the power indicator icon: Battery, External Power, or Charging.

Speed—your current vehicle speed can be measured in miles per hour,

kilometers per hour, or knots.

ETA (Destination)—Estimated Time of Arrival. The estimated time you will

reach your destination.

Steer—see Course to Steer.

ETA (Next)—Estimated Time of Arrival. The estimated time you will reach the

next point on your route.

Sunrise—the time at which the sun rises on this day.

Sunset—the time at which the sun sets on this day.

ETE (Destination)—Estimated Time Enroute. The estimated time required to

reach your destination.

Time—the current time and date. It can be shown in 12-hour or 24-hour format

ETE (Next)—Estimated Time Enroute. The estimated time required to reach

in local time or universal (UTC) time.

the next point on your route.

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APPendIX > dAtA fIeld oPtIons

Track—the direction of movement relative to a ground position. Also referred

Water Speed (Marine Only)—the data acquired from measurement devices

to as ground track.

interfaced to the unit is used to calculate your current speed over water.

Trip Avg. Speed (Moving)—the average speed while moving since the last

reset of the trip computer. Appears as Mov Avg Spd.

Water Temperature (Marine Only)—the temperature of water at a measured

depth using measurement devices interfaced to the unit.

Trip Avg. Speed (Total)—the total average speed traveled since the last reset

of the trip computer. Appears as Ttl Avg Spd.

Waypoint (Destination)—the last point on a route, your destination. Appears

as Dest Wpt.

Trip Odometer—the total distance traveled since the trip computer was reset.

Waypoint (Next)—the next waypoint in your route. Appears as Next Wpt.

Weather–Dew Point—the dewpoint at the nearest weather reporting station.

Trip Timer (Moving)—the length of time your vehicle has been in motion,

since the trip computer was reset. Appears as Move Timer.

Weather–Pressure—the surface pressure at the nearest weather reporting

Trip Timer (Total)—the total time the unit has been tracking since the trip

station.

computer was reset.

Weather–Relative Humidity—the relative humidity at the nearest weather

Ttl Avg Spd—see Trip Avg. Speed (Total).

reporting station.

Turn—the distance between Bearing (BRG) and Track (TRG). L indicates you

should turn left. R indicates you should turn right. The degrees indicates the

difference angle and the number of degrees you should turn.

Weather–Temperature—the temperature at the nearest weather reporting

station.

Weather–Wind—the wind speed and direction at the nearest weather reporting

User Timer—the timer you set on the Main Menu.

station.

Velocity Made Good—the rate of closure on a destination based on your

current speed and course of travel. Appears as VMG.

XM Audio—the artist and song title of the XM audio channel currently

playing.

Vertical Speed—the rate of climb or descent.

XM Signal—the strength of the XM signal.

Voltage—the direct current voltage level of an external power source.

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APPendIX > softWAre lIcense AgreeMent And Product regIstrAtIon

Software License Agreement

Product Registration

Help us better support you by completing our online registration

today. Go to http://my.garmin.com. Keep the original sales receipt,

or a photocopy, in a safe place.

BY USING THE GPSMAP 378/478, YOU AGREE TO BE BOUND BY THE

TERMS AND CONDITIONS OF THE FOLLOWING SOFTWARE LICENSE

AGREEMENT. PLEASE READ THIS AGREEMENT CAREFULLY.

Garmin grants you a limited license to use the software embedded in this

device (the “Software”) in binary executable form in the normal operation of

the product. Title, ownership rights, and intellectual property rights in and to

the Software remain in Garmin.

Serial Number: ___ ___ ___ ___ ___ ___ ___ __

Contact Garmin

You acknowledge that the Software is the property of Garmin and is protected

under the United States of America copyright laws and international copyright

treaties. You further acknowledge that the structure, organization, and code

of the Software are valuable trade secrets of Garmin and that the Software in

source code form remains a valuable trade secret of Garmin. You agree not

to decompile, disassemble, modify, reverse assemble, reverse engineer, or

reduce to human readable form the Software or any part thereof or create any

derivative works based on the Software. You agree not to export or re-export

the Software to any country in violation of the export control laws of the

United States of America.

Contact Garmin Product Support if you have any questions while

using your GPSMAP 378/478. In the USA, go to www.garmin.

com/support, or contact Garmin USA by phone at (913) 397.8200 or

(800) 800.1020.

In the UK, contact Garmin (Europe) Ltd. by phone at 0808 2380000.

In Europe, go to www.garmin.com/support and click Contact

Support for in-country support information, or contact Garmin

(Europe) Ltd. by phone at +44 (0) 870.8501241.

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APPendIX > lIMIted WArrAnty

number clearly on the outside of the package. Send the unit, freight charges

prepaid, to any Garmin warranty service station.

Limited Warranty

This Garmin product is warranted to be free from defects in materials or

workmanship for one year from the date of purchase. Within this period,

Garmin will, at its sole option, repair or replace any components that fail in

normal use. Such repairs or replacement will be made at no charge to the

customer for parts or labor, provided that the customer shall be responsible for

any transportation cost. This warranty does not cover failures due to abuse,

misuse, accident, or unauthorized alteration or repairs.

Online Auction Purchases: Products sold through online auctions are not

eligible for rebates or other special offers from Garmin. Online auction

conﬁrmations are not accepted for warranty veriﬁcation. To obtain warranty

service, an original or copy of the sales receipt from the original retailer is

required. Garmin will not replace missing components from any package

purchased through an online auction.

THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE

EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESS,

IMPLIED, OR STATUTORY, INCLUDING ANY LIABILITY ARISING

UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR A PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS

WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, WHICH MAY

VARY FROM STATE TO STATE.

International Purchases: A separate warranty is provided by international

distributors for units purchased outside the United States. This warranty is

provided by the local in-country distributor and this distributor provides

local service for your unit. Distributor warranties are only valid in the area of

intended distribution. Units purchased in the United States or Canada must

be returned to the Garmin service center in the United Kingdom, the United

States, Canada, or Taiwan for service.

Garmin International, Inc.

1200 East 151st Street,

Olathe, Kansas 66062, USA

Tel. (913) 397-8200 or

(800) 800-1020

Garmin (Europe) Ltd.

Liberty House,

IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL,

SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, WHETHER

RESULTING FROM THE USE, MISUSE, OR INABILITY TO USE THIS

PRODUCT OR FROM DEFECTS IN THE PRODUCT. Some states do not

allow the exclusion of incidental or consequential damages, so the above

limitations may not apply to you. Garmin retains the exclusive right to repair

or replace the unit or software or offer a full refund of the purchase price

at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND

EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.

Hounsdown Business Park,

Southampton, Hampshire, SO40 9RB UK

Tel. +44 (0) 870.8501241 (outside the UK)

0808.2380000 (within the UK)

Fax +44 (0) 870.8501251

Fax (913) 397-8282

Garmin Corporation

No. 68, Jangshu 2nd Road,

Shijr, Taipei County, Taiwan

Tel. 886/2.2642.9199

To obtain warranty service, contact your local Garmin authorized dealer or

call Garmin Product Support for shipping instructions and an RMA tracking

number. Securely pack the unit and a copy of the original sales receipt, which

is required as the proof of purchase for warranty repairs. Write the tracking

Fax 886/2.2642.9099

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APPendIX > WeAther dAtA WArrAnty

LIMITS ON OUR RESPONSIBILITY

Weather Data Warranty

THE WEATHER DATA SOFTWARE PRODUCT IS PROVIDED “AS IS.”

ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING

ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A

PARTICULAR PURPOSE OR OF NON-INFRINGEMENT ARE HEREBY

EXCLUDED.

a) DISCLAIMERS.

EXCEPT AS EXPRESSLY PROVIDED HEREIN, WE MAKE NO

WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED,

REGARDING THE RADIO SERVICE. YOUR USE OF THE SERVICE IS

AT YOUR SOLE RISK. THE CONTENT AND FUNCTIONALITY OF

THE SERVICE IS PROVIDED “AS IS” WITHOUT ANY WARRANTY

OF ANY KIND, EXPRESS OR IMPLIED. ALL SUCH WARRANTIES

OR REPRESENTATIONS (INCLUDING, WITHOUT LIMITATION, THE

IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A

PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT) ARE

HEREBY DISCLAIMED.

USER SAFETY

If you use XM Services it is your responsibility to exercise prudent discretion

and observe all safety measures required by law and your own common sense.

You assume the entire risk related to your use of the Services. XM and Garmin

assume no responsibility for accidents resulting from or associated with use

of the Services. Your Radio Service includes trafﬁc and weather information,

and you acknowledge that such information is not for “safety for life”, but is

merely supplemental and advisory in nature, and therefore cannot be relied

upon as safety-critical in connection with any aircraft, sea craft or automobile

usage. This information is provided “as is” and XM and Garmin disclaim any

and all warranties, express and implied, with respect thereto or the transmission

or reception thereof. XM and Garmin further do not warrant the accuracy,

reliability, completeness or timeliness of the trafﬁc and weather information

disclosed on the Radio Service. In no event will XM and Garmin, their data

suppliers, service providers, marketing/distribution, software or Internet partners

or hardware manufacturers be liable to you or to any third party for any direct,

indirect, incidental, consequential, special, exemplary or punitive damages or

lost proﬁts resulting from use of or interruptions in the transmission or reception

of the Services.

b) LIMITATIONS OF LIABILITY.

WE ARE NOT RESPONSIBLE FOR ANY SPECIAL, INCIDENTAL, OR

CONSEQUENTIAL DAMAGES OR LOSSES RELATING TO THE USE

OF THE RADIO SERVICE, WHETHER BASED ON NEGLIGENCE OR

OTHERWISE. OUR TOTAL LIABILITY TO YOU AND ANY OTHER

PERSONS RECEIVING OUR SERVICES, REGARDLESS OF THE CAUSE,

WILL IN NO EVENT EXCEED THE AMOUNTS THAT YOU HAVE PAID

TO US FOR THE SERVICE THAT YOU RECEIVED DURING THE SIX

(6) MONTH PERIOD IMMEDIATELY PRIOR TO THE SPECIFIC EVENT

THAT GAVE RISE TO THE APPLICABLE DAMAGE OR LOSS. THIS

ALLOCATION OF RISK IS REFLECTED IN OUR PRICES. YOU MAY

HAVE GREATER RIGHTS THAN DESCRIBED ABOVE UNDER YOUR

STATE’S LAWS.

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APPendIX > XM sAtellIte rAdIo servIce AgreeMent

This product was developed using DAFIF™, a product of the National

Geospatial-Intelligence Agency.

XM Satellite Radio Service Agreement

XM Satellite Radio Inc.

This product has not been endorsed or otherwise approved by the National

Geospatial-Intelligence Agency, or the United States Department of Defense (10

U.S.C. 425)

Hardware and required monthly subscription sold separately. Subscription fee

is consumer only. Other fees and taxes, including a one-time activation fee

may apply. All programming fees and weather data subject to change. XM WX

weather data is shown and individual product availability vary by hardware

equipment. Reception of the XM signal may vary depending on location.

Subscriptions subject to Customer Agreement included with the XM Welcome

Kit and available at xmradio.com. Available only in the 48 contiguous United

States. XM WX is a trademark of XM Satellite Radio Inc.

a. Under 10 U.S.C. 456, no civil action may be brought against the United

States on the basis of the content of a navigational aid prepared or disseminated

by either the former Defense Mapping Agency (DMA), National Imagery and

Mapping Agency (NIMA), or the National Geospatial-Intelligence Agency

(NGA).

b. The DAFIF™ product is provided “as is,” and no warranty, express or

implied, including, but not limited to the implied warranties of merchantability

and ﬁtness for particular purpose or arising by statute or otherwise in law or

from a course of dealing or usage in trade, is made by NGA as to the accuracy

and functioning of the product.

c. Neither NGA nor its personnel will be liable for any claims, losses, or

damages arising from or connected with the use of this product. The user

agrees to hold harmless the United States National Geospatial-Intelligence

Agency. The user’s sole and exclusive remedy is to stop using the DAFIF

product.

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APPendIX > fcc coMPlIAnce

equipment does cause harmful interference to radio or television reception,

which can be determined by turning the equipment off and on, the user is

encouraged to try to correct the interference by one of the following measures:

FCC Compliance

This device complies with part 15 of the FCC Rules. Operation is subject to the

following two conditions: (1) this device may not cause harmful interference,

and (2) this device must accept any interference received, including

interference that may cause undesired operation.

•

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and the receiver.

This equipment has been tested and found to comply with the limits for a Class

B digital device, pursuant to part 15 of the FCC rules. These limits are designed

to provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses, and can radiate radio frequency

energy and may cause harmful interference to radio communications if not

installed and used in accordance with the instructions. However, there is no

guarantee that interference will not occur in a particular installation. If this

Connect the equipment into an outlet that is on a different circuit from

the GPS unit.

•

Consult the dealer or an experienced radio/TV technician for help.

This product does not contain any user-serviceable parts. Repairs should

only be made by an authorized Garmin service center. Unauthorized repairs

or modiﬁcations could result in permanent damage to the equipment, and

void your warranty and your authority to operate this device under Part 15

regulations

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IndeX

append to route 27

arrival alarm 76

calendar tab 78

calibrate water speed 109

cards, data 120

carpool lanes 87