Garmin Fish Finder 100 BLUE User Manual

Fishfinder 100 Blue  
owners  
manual  
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Thank you for choosing the GARMIN Fishnder 100 Blue. This  
product is designed for easy operation and to provide years of reliable  
service.  
Introduction  
Please take the time to read this Owners Manual, and learn the opera-  
tion of your new unit. This will help ensure that you get the most from  
the Fishnder 100 Blue.  
Customer Service  
Product Registration  
If you encounter a problem, or just have a question, contact  
our Product Support Department at 913-397-8200 or 800-800-1020,  
Monday Friday 8:00 a.m. to 5:00 p.m. Central Time.  
Help us better support you by completing our  
on-line registration today! Have the serial number  
of your Fishfinder 100 Blue handy and connect  
to our web site (www.garmin.com). Look for the  
Product Registration link on the Home page.  
Enjoy your new Fishnder 100 Blue and once again thank you for  
choosing GARMIN.  
Why should you register your Fishfinder 100  
Blue?  
• Notification of product updates  
• Notification of new products  
• Lost or stolen unit tracking  
i
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GARMIN Corporation warrants this product to be free from defects in materials  
and manufacture for one year from the date of purchase. 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. The  
customer is, however, responsible for any transportation costs. This warranty does  
not cover failures due to abuse, misuse, accident or unauthorized alteration or  
repairs.  
Introduction  
Limited Warranty  
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE  
AND IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR 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.  
I
All of the Fishnder 100 Blue screens shown  
throughout this manual are simulated. These  
screens are meant to provide the user with a general  
knowledge of how the unit functions, and may not  
reect what will actually be seen on the unit when  
in operation.  
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.  
To obtain warranty service, call the GARMIN Customer Service department  
(913-397-8200 or 800-800-1020) for a returned merchandise tracking number.  
The unit should be securely packaged with the tracking number clearly marked  
on the outside of the package and sent freight prepaid and insured to a GARMIN  
warranty service station. A copy of the original sales receipt is required as the proof  
of purchase for warranty repairs. 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.  
ii  
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The Fishnder 100 Blue Standard Package Includes:  
Fishnder 100 Blue  
Introduction  
Surface Mount Bracket with Knobs  
Power/Data Cable  
Owners Manual  
Packaging and Accessories  
Dual Frequency Transom Mount Transducer (with depth/temp)*  
Optional Dual Frequency Transducers and Accessories:  
Plastic Transom Mount Transducer (with depth/temp)*  
Bronze Thru-Hull Transducer (depth only)  
Plastic Thru-Hull Transducer (depth only)  
Speed Sensor*  
Temperature Sensor  
Protective Front Cover  
10Transducer Extension Cable  
20Transducer Extension Cable  
Second Mounting Station  
Flush Mounting Kit  
Swivel Mount, 1RAM  
Cigarette Lighter Adapter  
Power/Data Cable  
18-Pin A/C PC Adapter (US)  
18-Pin A/C PC Adapter (EURO)  
* Included with Optional Package  
iii  
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Unit Operation...................................................10-29  
Keypad Functions ..................................................................10  
Display Information ...............................................................11  
Introduction  
Using the Adjustment Bar:  
Range .....................................................................................12  
Zoom .....................................................................................13  
View.......................................................................................13  
Gain .......................................................................................14  
Setup Menu:  
Table of Contents  
Introduction..........................................................i-vi  
Customer Service ..................................................................... i  
Limited Warranty .................................................................... ii  
Packaging and Accessories...................................................... iii  
Unit Display........................................................................... vi  
Chart Tab  
Frequency ..............................................................................15  
Fish Symbols..........................................................................16  
Whiteline ...............................................................................17  
Scroll Speed ...........................................................................17  
Scale.......................................................................................18  
Installation ...........................................................1-9  
Transducers............................................................................. 1  
Transom Mount Installation ................................................... 2  
In-hull Installation .................................................................. 3  
Speed Sensor Installation......................................................... 4  
Wiring Harness Installation..................................................... 5  
Wiring to a Fuse Block ............................................................ 5  
Display Installation (Surface Mount) ....................................... 7  
Display Installation (Flush Mount).......................................... 8  
Testing the Installation ............................................................ 9  
Tools Tab  
Flasher ...................................................................................19  
Simulator ...............................................................................19  
Noise Reject ...........................................................................19  
Numbers Tab  
Number Size ..........................................................................20  
Battery Voltage........................................................................21  
Temperature...........................................................................21  
Speed .....................................................................................22  
Depth Number.......................................................................22  
iv  
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Alarm Tab  
Fish Alarm ............................................................................23  
Shallow Water ........................................................................24  
Deep Water ............................................................................24  
Battery Voltage .......................................................................25  
Introduction  
Table of Contents  
System Tab  
Contrast .................................................................................25  
Beeper....................................................................................26  
NMEA Output........................................................................26  
Language................................................................................26  
On the Water .................................................... 30-35  
Understanding Sonar..............................................................30  
Transducer Coverage..............................................................31  
Understanding the Chart........................................................32  
Whiteline ...............................................................................33  
Thermoclines .........................................................................34  
Simulator Mode......................................................................35  
Calibrations Tab  
Keel Offset..............................................................................27  
Water Type .............................................................................27  
Calibrate Speed ......................................................................27  
Units Tab  
Appendix A: Specifications.................................... 36  
Appendix B: Alarm Messages and Icons................ 37  
Appendix C: Index ............................................ 38-40  
Depth ...................................................................................28  
Temperature...........................................................................28  
Speed .....................................................................................28  
Memory Tab  
Remember..............................................................................29  
Factory Setup.........................................................................29  
Software Version.....................................................................29  
v
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The Fishnder 100 Blue is capable of displaying a variety of useful  
information about the underwater environment. Below are a few things  
the unit will help you see.  
Introduction  
Water Depth  
The unit displays water depth and can provide a warning for shallow  
or deep-water conditions.  
What can the Fishnder 100 Blue  
Display?  
Battery Voltage  
The unit can display the battery voltage that is available to the unit.  
Speed Over Water*  
If equipped with a capable transducer or speed sensor, the unit can  
display the boat’s speed over water.  
Water Temperature*  
If equipped with a capable transducer or temperature sensor, the unit  
can display the water temperature.  
Fish  
The unit displays fish as arches or fish symbols, and can alert you when  
a fish is detected.  
ENTER  
SETUP  
Thermocline and Structure  
With GARMINs See-Thru® technology, the Fishnder 100 Blue can  
display more than just the thermocline and structure. The unit displays  
sh in and below the thermocline, trees, brush and deadfall like you  
have never seen before!  
Bottom Shape and Type  
Garmins unique DCG® (Depth Control Gain) system provides a clear  
graphic representation of the bottom type and its shape.  
Transducer Frequency*  
If equipped with a capable transducer, the unit will display the fre-  
quency selected for use; either 200kHz, 50kHz or Dual.  
Download from Www.Soman*uaRlse.qcoumire.sAollpMtiaonnuaalltsraSnesadruchceArnodr Dspoewendlosaedn.sor  
vi  
Transducers  
The transducer acts as the eyes and ears of your new sonar. Proper  
transducer selection and installation are critical to the operation of your  
unit.  
Installation  
Included in the Optional Package is a 200/50kHz frequency (10°/40°  
cone angle), depth and temperature sensing, transom mount transducer.  
This transducer provides good all-around performance. Other optional  
dual frequency transducers are available from your local dealer or GARMIN.  
Transducers  
The transducer transmits sound waves toward the bottom in a cone  
shape. The wider the cone angle, the larger the coverage area at a given  
depth. While it is good to see as large of an area as possible, it is best to  
select a frequency setting that suits the water that you are on.  
wide cone  
angle  
With a dual frequency transducer, you may select either a 200kHz  
frequency, a 50kHz frequency or both. The 50kHz frequency setting  
provides a wide cone angle. This wide cone angle produces a large coverage  
area, but less detailed bottom resolution. In areas where bottom contours  
change quickly, this can result in dead zoneswhere fish cannot be seen.  
narrow cone  
angle  
dead zone  
fish not seen  
In contrast, the 200kHz frequency setting provides a narrow cone  
angle. This narrow cone angle produces a smaller viewing area (compared  
to a wide cone angle at the same depth), but with improved bottom  
resolution and a smaller dead zone.  
X
The Dual frequency setting will provide you the most accurate depth  
and fish returns by transmitting signals at both 200kHz and 50kHz.  
X
1
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Proper transducer installation is key to getting the best performance  
from your new unit. If the transducer lead is too short, extension cables  
are available from you GARMIN dealer. DO NOT cut the transducer lead  
or any part of the transducer cable, as this will void your warranty. The  
cable cannot be spliced and connected to any existing (GARMIN or non-  
GARMIN) transducer cables.  
Installation  
Mounting the Transducer  
Following are some tips and basic installation instructions for the  
optional dual frequency transducer and speed sensor. Detailed installation  
instructions are provided in the transducer kits.  
DO NOT mount the transducer behind strakes,  
struts, fittings, water intake or discharge ports, or  
anything that creates air bubbles or causes the  
water to become turbulent. It is important that  
the transducer be in calm, non-turbulent water for  
optimal performance.  
Transom Mount Installation  
Dual Frequency Transom Mount Transducer (with depth/temp).  
Apply marine sealant to all  
screw threads to prevent water  
from seeping into the transom.  
Mount the transducer cable cover  
well above the waterline.  
Transducer should extend 1/8" below  
fiberglass hull or 3/8" below aluminum hull  
Make sure that the transducer is  
below water level when the boat  
is on plane at high speed  
OK  
Do not mount transducer directly in the  
path of the prop. The transducer can cause  
cavitation that may degrade the boat's performance  
and damage the prop.  
Mount the transducer parallel with the bottom.  
2
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In-Hull Installation  
To avoid drilling a hole to mount a thru-hull transducer, a transom  
mount transducer may be used with epoxy inside a boat (also called shoot-  
thru-hullinstallation). For a transducer to be mounted inside the hull  
(shoot-thru, not thru-hull), the boat must be berglass, no core (contact  
your boat manufacturer if you are unsure). Test by placing a small amount  
of water inside the hull, placing the transducer on top of the water, then  
verifying the accuracy of the locators versus the current water depth. If  
they are the same, use epoxy (non-silicone based) to afx the transducer  
to the inside of the hull. If using a temperature sensing transducer, the  
temperature displayed will reflect the hull temperature.  
Installation  
Mounting the Transducer  
Many modern hulls have a prelocated pocket for  
In-hull transducer installation. If you are unsure  
if your hull is equipped with a prelocated pocket,  
contact your hull manufacturer.  
Selecting a Location  
The location has to be solid berglass, devoid of any air bubbles,  
laminates, llers or dead air space. The location needs to be in an  
area of clean water at all speeds. Do not place the transducer over  
any strakes or behind any obstruction on the hull that would create  
turbulence.  
Weight  
transducer to  
hold it in place  
PVC Pipe  
Testing the Location  
or a Can  
Place the transducer in the water, pointed directly at the bottom, and  
set the unit for optimum performance. Place the transducer in the test  
device as show on the side bar. If the sonar performance is signicantly  
degraded, another location will need to be tested.  
Fill Pipe or Can  
with water or a  
light mineral oil  
Strip Caulk or  
RTV Sealer  
Hull Surface  
Testing the Location  
Continued on page 4  
3
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In-Hull Installation (continued)  
Installing the Transducer:  
Installation  
1. Lightly sand the surface of the hull and face of the transducer with 400  
grit wet or dry sandpaper.  
2. Build a dam using strip caulk about 1/4tall. Pour about 1/8of 2-part,  
slow cure epoxy in the dam. Place the transducer in the epoxy, turning  
the transducer to work out any air bubbles.  
Mounting the Transducer/  
Speed Sensor  
3. Weight the transducer in place and allow to cure for 24 hours.  
Weight transducer in place  
for at least 24 hours  
Apply twisting motion  
to eliminate any  
trapped air bubbles  
Slow cure  
2-part epoxy  
Speed Sensor Installation  
The speed sensor should be mounted as near the center of the boat  
as possible. Like the transducer, for the speed sensor to operate properly,  
it should be located in non-turbulent water. Follow the directions in the  
speed sensor installation instructions to assemble the speed sensor with  
the mouning bracket, drill holes in the transom, mount the assembly and  
route the cable.  
Strip Caulk or  
RTV Sealer  
Installing the Transducer  
Drill a 3/4” hole well above the water line.  
Coat the inside of the hole with Marine Sealant.  
OK  
Position Cable Clamps about one-third of  
the distance from the hole to the transducer.  
Adjust the speed sensor so it is parallel with the bottom  
of the boat. If the speed sensor is not adjusted properly,  
the sonar may experience degraded speed readings.  
Drill 1/8pilot holes 3/8deep for the mounting screws.  
Coat the screws with Marine Sealant before installing them.  
4
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Wiring Harness Installation  
The Fishfinder 100 Blue comes with a wiring harness that connects  
the unit to power and the transducer with one easy-to-remove connection.  
Make sure the wiring harness will reach the unit before beginning  
installation.  
Installation  
Installing the Wiring Harness  
If it is necessary to extend the power/data wires, use a wire of compa-  
rable size and keep your extension as short as possible. If the transducer  
lead is too short, DO NOT cut the transducer lead to lengthen the cable.  
This will void the warranty. Transducer extension cables are available in 10’  
or 20lengths from your GARMIN dealer.  
10-18 Volt Boat Supply  
+
Wiring to a Fuse Block  
Install 2-Amp Fuse  
If your boat has an electrical system, it may be possible to wire the unit  
directly to an unused holder on your current fuse block. If you are using the  
boats fuse block, remove the in-line fuse holder supplied with the unit.  
Installing the Wiring Harness:  
1. Determine the polarity of the fuse holder using a Test Light or Volt Meter.  
2. Install the Red (+) wire on the Positive Fuse Holder Terminal.  
3. Install the Black (-) wire on the Negative Fuse Holder Terminal.  
4. Install a 2 amp fuse in the Fuse Holder.  
-
Boat Ground  
During a typical installation, only the Red and Black wires are used. The  
Blue wire supplies NMEA data, and doesnt have to be connected for normal  
operation of the unit. The Yellow wire is not used.  
Fishfinder 100 Blue  
Continued on page 6  
5
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Wiring Harness Installation (continued)  
If your boat does not have a fuse block, the unit can be wired directly  
to the battery. Make sure the 2-Amp in-line fuse supplied with the unit  
is installed.  
Installation  
The Fishnder 100 Blue can be connected to another piece of NMEA-  
compatible electronic equipment. If equipped with a capable transducer  
and speed sensor, the Fishnder 100 Blue sends depth, temperature and  
speed information that could be used by, or displayed on another device.  
Installing the Wiring Harness  
Power/Data  
Connection  
Speed  
Temp Transducer  
Connecting a Transducer to Multiple Sensors  
6
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Display Installation (Surface Mount)  
The Fishnder 100 Blue can be mounted to a at surface using the  
supplied Surface Mount Bracket.  
Installation  
Surface Mounting the Display:  
Installing the Display  
1. Position the Surface Mount Bracket in the desired location. Leave  
approximately 2behind the unit for cable clearance.  
2. Mark the location of the four mounting holes with a pencil.  
3. Drill pilot holes for the mounting fasteners (not included in kit).  
4. Secure the Surface Mount Bracket using the mounting fasteners.  
5. Slip the unit into the Surface Mount Bracket.  
6. Tighten the knobs to secure the unit to the bracket.  
The Surface Mount Bracket is designed to be secured using a at head screw.  
If you use a screw with a countersunk head, you risk damaging the Surface  
Mount Bracket.  
Surface Mount  
Bracket  
OK  
7
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Display Installation (Flush Mount)  
The Fishnder 100 can be mounted ush against the dash or electron-  
ics rack that is no more than 1/4thick.  
Installation  
Flush Mounting the Display:  
1. Remove the Surface Mount Bracket and Knobs.  
2 Cut a 4.3W x 4.35H relief hole where the unit will be mounted.  
3. Place the display in the relief hole and tape in place.  
Installing the Display  
4. Reinstall the knobs in the unit. Install the surface mount with the cam  
lobes pointed toward the unit.  
5. Rotate the surface mounting bracket forcing the cam lobes to pull the  
unit tight against the surface. Tighten the knobs.  
Pull bracket down until cam lobe contacts surface  
8
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Testing the Installation  
While it is possible to perform some checks with the boat trailered, the  
boat should be in the water to properly test the installation.  
Installation  
Press the Power button and the Fishfinder 100 Blue should power on.  
If the unit fails to power on, verify that the wiring adapter is seated properly  
in the back of the unit, the Red and Black wires are connected to the correct  
polarity, and the 2-Amp fuse is installed and not blown. If the unit is  
connected to a power supply that exceeds 18 VDC, a Battery Voltage High’  
warning will be displayed and the unit will turn off.  
Testing the Installation  
As the unit powers on, it should immediately start showing the bottom.  
Verify that the unit is not in the simulator mode. If the unit is in the  
simulator mode, make sure that the transducer is connected to the wiring  
harness.  
Simulator Message and Icon  
To test the transducer and speed sensor installation, gradually increase  
the boats speed while checking the unit operation. If the unit displays  
intermittently or fails to display, verify that the transducer and speed sensor  
are aligned parallel with the bottom. If necessary, adjust their heights until  
the unit operates correctly. It may be necessary to make several adjustments  
to ensure proper operation throughout the speed range. If the signals do  
not improve, it may be necessary to move the transducer or speed sensor  
to a different location.  
If the Fishnder 100 Blue is in Simulator Mode, the  
message Simulator Onwill be displayed along the  
bottom of the screen. The message will be replaced  
by the Sicon indicating that the unit is running  
in simulator mode.  
When adjusting the depth of the transducer, make the adjustments in small  
increments, no more than 1/8. Placing the transducer or speed sensor too  
deep can adversely affect the boats performance and increase the risk that they  
may strike underwater objects.  
9
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Unit Operation  
Arrow Keys  
Keypad Functions  
The Arrow keys are used to select items on the Adjustment Bar and  
Setup Menu and to change eld data.  
Enter Key  
The ENTER key is used to activate/deactivate the Adjustment Bar and  
Setup Menu data elds for review or change.  
Setup Key  
The SETUP key is used to activate/deactivate the Setup Menu.  
Power Key  
The Power key is used to turn the unit on/off and to activate the display  
backlight. Press and hold to turn the unit off. Press briey and release  
to activate, and change the level of the backlight.  
10  
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At the top left of the display you will find the Adjustment Bar and  
a variety of user-selectable information including Depth, Battery Voltage,  
Water Temperature, and Speed Over Water. To provide data on Speed Over  
Water, the Fishfinder 100 Blue requires an additional speed sensor.  
Unit Operation  
The Depth Scale and the Flasher are displayed from top to bottom  
along the right side of the display. Messages and Alarm Icons are displayed  
along the bottom.  
Describing The Display  
The Fishfinder 100 Blue has three levels of display backlighting: Off,  
Low and High. The backlight is activated by momentarily pressing the  
Power key. To change the backlight level, press the Power key repeatedly.  
Adjustment Bar  
Depth  
If the unit is unable to track the bottom for any reason,  
the digits in the depth window will ash on and off to  
alert the user that the unit is not tracking the bottom.  
Battery Voltage  
Water Temperature  
Speed Over Water  
Depth Scale  
Flasher  
Transducer Frequency  
Alarm/Message Icons  
11  
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Using the Adjustment Bar  
The Adjustment Bar allows direct access to the most commonly  
changed settings. These include the depth Range, the Zoom setting, and  
the Gain (sensitivity) of the unit.  
Unit Operation  
Place the highlight (white bar) over the desired selection using the  
RIGHT or LEFT Arrow key, and the current setting will be displayed in  
the highlight. To immediately change the setting, press the UP or DOWN  
Arrow key. If you wish to review the available settings before making a  
change, press the ENTER key to activate the adjustment list.  
The Adjustment Bar  
Current Setting  
Range  
The Range Adjustment is used to set the display depth range. The  
unit can be set to automatically track the bottom or set to a user-specified  
depth range.  
Adjustment List  
To select a Depth Range:  
1. Highlight Rangeon the Adjustment Bar.  
2. Using the UP or DOWN Arrow, place the pointer at the desired depth  
range.  
To set the unit to automatically track the bottom:  
1. Highlight Rangeon the Adjustment Bar.  
Range Adjustment  
2. Using the UP or DOWN Arrow, select Autoat the top of the  
adjustment list.  
12  
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Zoom  
The Zoom Adjustment is used to quickly select a display zoom scale.  
Unit Operation  
To change the Zoom Scale:  
1. Highlight Zoomon the Adjustment Bar.  
The Adjustment Bar  
2. Using the UP or DOWN Arrow, select the desired display zoom level.  
When a scale other than No Zoomis selected, the Adjustment Bar will  
display a new selection labeled View.’  
View  
The View Adjustment is available only when a Zoom Scale other than  
No Zoomis selected. This setting allows you to select a specific area to  
view on the display, or allows the unit to automatically select a viewing area  
based on the bottom.  
To change the View:  
1. Highlight View on the Adjustment Bar.  
2. Press the UP or DOWN Arrows to change the setting.  
Zoom Adjustment  
To have the unit automatically set a View:  
1. Highlight Viewon the Adjustment Bar.  
2. Using the UP or DOWN Arrow, move the slider to the top or bottom of  
the range, then release and press the Arrow again.  
View Adjustment  
13  
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Gain  
The Gain Adjustment allows the user to control the sensitivity of the  
units receiver. This provides some flexibility in what is seen on the display.  
To see more detail, increase the receiver sensitivity by selecting a higher gain  
(+). If there is too much detail or if the screen is cluttered, lowering the  
sensitivity (-) may increase the clarity of the display.  
Unit Operation  
The Adjustment Bar  
To change the Gain:  
1. Highlight Gainon the Adjustment Bar.  
2. Using the UP or DOWN Arrows, move the pointer to the desired setting.  
Normal Gain  
Maximum Gain  
Minimum Gain  
14  
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SETUP MENU  
The Setup Menu contains the unit settings that should not require  
frequent change. The Setup Menu is divided into eight tabs: Chart, Tools,  
Numbers, Alarms, System, Calibrations, Units, and Memory. Each tab will  
be described in more detail in this section.  
Unit Operation  
Setup Menu: Chart Tab  
To enter and exit the Setup Menu, press the SETUP button on the face  
of the unit. The first time that the SETUP button is pressed, the Setup  
Menu will be displayed with the Charttab highlighted in black. Pressing  
the UP or DOWN arrow will move the highlight between the tab selections.  
Press the RIGHT arrow to access the selection fields. Each time the Setup  
Menu is accessed, the unit will return to the last edited selection field. Press  
the LEFT arrow key to get back to the tabs.  
Chart Tab  
The Charttab allows the user to determine the appearance of the  
scrolling chart display. To access the Charttab, place the highlight over  
it using the arrow keys.  
Frequency  
The Frequencysetting allows you to choose a transducer frequency.  
Frequency refers to the pitchof the sound that the transducer sends and  
receives. You may choose 200kHz(default), 50kHzor Dualfrequency.  
Frequency Settings  
Continued on page 16  
15  
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Frequency (continued)  
The wide cone angles associated with low frequencies (40° for 50kHz)  
provide a large coverage area for nding sh. However, this also means that  
wide cone angles produce less bottom detail and resolution. The narrow  
cone angles associated with high frequencies (10° for 200kHz) provide  
better bottom resolution and crisper detail, but therefore cannot show a  
large coverage area for nding sh. Dual frequency mode combines the  
improved contour detail and depth readings of the 200kHz frequency with  
the wide coverage area of the 50kHz frequency.  
Unit Operation  
Setup Menu: Chart Tab  
To select a Frequency:  
1. Highlight the Charttab on the Setup Menu.  
2. Highlight the Frequencyselection eld and press ENTER.  
3. Using the UP or DOWN Arrow, choose 200kHz,50kHzor Dualand  
press ENTER. The selected frequency will be displayed in the bottom  
left-hand corner of the chart.  
Fish Symbols  
Fish Symbols  
All available information will be displayed.  
Fish Symbolsallows the user to determine how the chart will display  
underwater targets and background information. If Fish Symbolsis set  
to Off,the unit will display all of the available information about the  
underwater environment. If a fish symbol is selected, the chart will display  
only the information related to that symbol.  
Suspended targets will display as symbols. In this mode,  
background information will still be displayed making  
fish identification easier.  
Same as above with target depth displayed.  
To select a Fish Symbol:  
1. Highlight the Charttab on the Setup Menu.  
2. Highlight the Fish Symbolselection eld and press ENTER.  
Suspended targets displayed as symbols. No background  
information will be displayed in this mode.  
3. Using the UP or DOWN Arrow, select the desired symbol and press  
ENTER.  
Same as above with target depth displayed.  
16  
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NOTE: When the frequency is set to Dual,the appearance  
of the sh symbols will change. Fish returns from the center  
of the beam will be black, but the sh returns from the edges  
of the beam will be clear.  
F
Unit Operation  
Setup Menu: Chart Tab  
Whiteline  
Whitelinecontrols how the unit displays information about the  
bottom type (hard or soft). With the Whiteline OFF, the bottom return  
will display as black and contain no information on bottom hardness. With  
Whiteline ON, the bottom return will become gray-scaled. The degree of  
gray-scale can be used to determine bottom hardness. See page 33 for more  
details on this feature.  
To change the Whiteline Setting:  
1. Highlight the Charttab on the Setup Menu.  
2. Highlight the Whitelineselection eld and press ENTER.  
3. Choose Onor Offand press ENTER to accept the selection.  
Fish Symbols in Dual Frequency Mode  
Scroll Speed  
You can adjust the speed that the chart scrolls from right to left by  
using the Scroll Speedselection eld. If you are sitting still or the chart is  
moving too fast, slowing the scroll rate can be benecial.  
To adjust the Scroll Speed:  
1. Highlight the Charttab on the Setup Menu.  
2. Highlight the Scroll Speedselection eld and press ENTER.  
3. Choose Fast,’ ‘Medium,’ ‘Slowor Pause,then press ENTER to accept  
the selection.  
Whiteline Selections  
17  
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Scale  
The depth Scaleis displayed vertically along the right side of the chart.  
The depth Scalecan be configured to display in four different modes: as an  
Overlay,in the Corners,with Basicor No Scale.’  
Unit Operation  
To change the Scale Setting:  
Setup Menu: Chart Tab  
1. Highlight the Charttab on the Setup Menu.  
2. Highlight the Scaleselection eld and press ENTER.  
3. Choose Overlay,’ ‘Corners,’ ‘Basicor No Scale,then press ENTER to  
accept the selection.  
Scale — ‘Overlay’  
Scale — ‘Corners’  
Scale — ‘No Scale’  
Scale — ‘Basic’  
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Tools Tab  
The Toolstab contains the Flasher,’ ‘Simulatorand Noise Reject’  
tools. The Noise Rejectand Flashertools are used to enhance the chart  
and help in identifying and providing information about an underwater  
return. The Simulatortool is used to enhance the simulator mode by  
allowing you to customize the simulated transducer selection. To access the  
Toolstab, place the highlight over it using the arrow keys.  
Unit Operation  
Setup Menu: Tools Tab  
Flasher  
With the Flashertool active, a graphic Flasher representation will be  
displayed on the far right side of the chart. This graphic Flasher displays  
structure and bottom returns much the same as a true Flasher. You may  
find this feature particularly useful when using Fish Symbols.’  
To Turn the Graphic Flasher on and off:  
1. Highlight the Toolstab on the Setup Menu.  
2. Highlight the Flasherselection eld and press ENTER.  
3. Select Onor Offand press ENTER to accept the selection.  
Graphic Flasher Activated  
Simulator  
The Simulatortool allows you to select a simulated transducer type for  
use with the Fishfinder 100 Blues built-in display simulator. These choices  
allow the simulator to more accurately depict actual operation of the unit.  
For details on using the simulator, see page 35.  
Noise Reject  
Remember when setting the Noise Reject tool, the  
higher the noise rejection setting, the more likely  
the unit is to not show sh or structure.  
The Noise Rejecttool helps filter unwanted noise from the chart. The  
Noise Rejecttool can be turned Off,set for Auto(automatic) adjustment  
or set for Manualadjustment.  
19  
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Noise Reject (continued)  
To change the Noise Reject Setting:  
Unit Operation  
1. Highlight the Toolstab on the Setup Menu.  
2. Highlight the Noise Rejectselection eld and press ENTER.  
3. Choose Off,Auto,or Manualand press ENTER.  
To manually adjust the Noise Reject Setting:  
Setup Menu: Tools/Numbers Tabs  
1. Select Manualin the Noise Reject’ field of the Toolstab of the Setup  
Menu, then press ENTER. A slider will appear below the Noise Reject’  
selection eld.  
2. Use the UP/DOWN Arrows to highlight the slider, then press ENTER.  
3. Use the LEFT/RIGHT Arrows to manually adjust the Noise Reject Slider  
to the desired setting, then press ENTER.  
Numbers Tab  
The Num(Numbers) tab allows you to choose whether you would  
like to see normal or large numbers on the chart. You can also configure  
the unit to display Battery Voltage,(water) Temperature,and SpeedOver  
Water if the unit is equipped with capable sensors. You can also set up how  
the unit finds the digital Depth Number.To access the Numtab, place the  
highlight over it using the arrow keys.  
Noise Reject Manual Adjustment Slider  
Number Size  
This setting determines the size of the numbers displayed in the  
Depth,’ ‘Temperature,’ ‘Battery Voltageand Speedfields on the chart.  
To select Normal or Large Numbers:  
1. Highlight the Numtab on the Setup Menu.  
2. Highlight the Number Sizeselection eld and press ENTER.  
Normal Numbers  
Large Numbers  
20  
3. Choose Normalor Largeand press ENTER to accept the selection.  
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Battery Volts  
The Fishfinder 100 Blue can display the current battery voltage on  
the chart.  
Unit Operation  
To show or hide the Battery Volts display eld:  
1. Highlight the Numtab on the Setup Menu.  
Setup Menu: Numbers Tab  
2. Highlight the Battery Voltsselection eld and press ENTER.  
3. Choose Showor Hideand press ENTER to accept the selection.  
Temperature  
The Fishfinder 100 Blue can display the water temperature when  
equipped with a temperature-sensing transducer. The unit will auto-  
matically sense when a temperature-capable transducer is connected. The  
temperature field can be shown or hidden, regardless of the transducer  
installed.  
To set the Temperature display eld:  
Battery Volts Selections  
1. Highlight the Numtab on the Setup Menu.  
2. Highlight the Temperatureselection eld and press ENTER.  
3. Choose Auto,’ ‘Showor Hide,then press ENTER to accept the  
selection.  
Temperature Display Selections  
21  
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Speed  
The Fishfinder 100 Blue can display the boats SpeedOver Water  
when equipped with a speed sensor. When set to Auto,the unit will  
automatically sense when a capable sensor is connected and display the  
boats speed.  
Unit Operation  
Setup Menu: Numbers Tab  
To set the Speed display eld:  
1. Highlight the Numtab on the Setup Menu.  
2. Highlight the Speedselection eld and press ENTER.  
3. Choose Auto,’ ‘Showor Hide,then press ENTER to accept the  
selection.  
Depth Number  
The Depth Numbersetting refers to how the unit finds the digital  
depth number that is displayed in the upper left corner of the screen.  
When set to Auto,the unit will show the most accurate digital depth  
possible. However, this may cause the chart to update slower as the unit  
calculates the Autodepth. When set to From Chart(default), the unit  
finds the digital depth from the same image you see on the chart. The From  
Chartsetting allows the chart to update faster than when the unit is set to  
Autoand is recommended when using the unit in deep water.  
Speed Display Selections  
NOTE: In From Chartmode, the Fishnder 100 Blue may  
not be able to get the digital Depth Number if the bottom  
is not visible on the chart. Adjust the Depth Range on the  
Adjustment Bar until the bottom is visible, or change the  
setting to Autoto get the digital Depth Number.  
F
Depth Number Selections  
22  
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To change the Depth Number Setting:  
1. Highlight the Numtab on the Setup Menu.  
Unit Operation  
2. Highlight the Depth Numberselection eld and press ENTER.  
3. Choose Autoor From Chart,then press ENTER to accept the  
selection.  
Setup Menu: Numbers/Alarms Tabs  
Alarm Tab  
The Alarmtab allows you to activate and configure the four alarms  
available in the Fishfinder 100 Blue. To access the Alarmtab, place the  
highlight over it using the arrow keys. See page 37 for alarm icons and  
messages.  
Fish Alarm  
The Fish Alarmcan be congured to sound by sh size. There are  
four different alarm selections: Off,’ ‘Small, Medium and Large,’ ‘Medium  
and Large,or Large.The Fish Alarmwill sound with or without the Fish  
Symbolsactivated on the Chart Tab of the Setup Menu.  
To set a Fish Alarm:  
1. Highlight the Alarmtab on the Setup Menu.  
2. Highlight the Fish Alarmselection eld and press ENTER.  
3. Choose the desired setting, then press ENTER to accept the selection.  
Fish Alarm Selections  
23  
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Shallow Water  
The Shallow WaterAlarm can be set to sound a warning at a depth  
determined by the user. The alarm must be activated before the unit will  
sound a warning. The alarm must be activated before the unit will sound  
a warning.  
Unit Operation  
Setup Menu: Alarms Tab  
To activate/deactivate the Shallow Water Alarm:  
1. Highlight the Alarmtab on the Setup Menu.  
2. Highlight the Shallow Watercheckbox.  
3. Pressing ENTER will insert or remove a check mark in the checkbox.  
To set the Shallow Water Alarm depth:  
1. Highlight the Shallow Waterdepth eld and press ENTER.  
2. Use the Arrow Keys to input the desired depth, then press ENTER to  
accept the setting.  
Deep Water  
Shallow Water Alarm  
The Deep WaterAlarm can be set to sound a warning at a depth  
determined by the user. The alarm must be activated before the unit will  
sound a warning.  
To activate/deactivate the Deep Water Alarm:  
1. Highlight the Alarmtab on the Setup Menu.  
2. Highlight the Deep Watercheckbox.  
3. Pressing ENTER will insert or remove a check mark in the checkbox.  
To set the Deep Water Alarm depth:  
1. Highlight the Deep Waterdepth eld and press ENTER.  
Deep Water Alarm  
2. Use the Arrow Keys to input the desired depth, then press ENTER to  
24  
accept the setting.  
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Battery Volts  
The Battery VoltsAlarm can be set to warn you when the battery  
reaches a critical state of discharge.  
Unit Operation  
To activate/deactivate the Battery Volts Alarm:  
1. Highlight the Alarmtab on the Setup Menu.  
Setup Menu: Alarms/System Tabs  
2. Highlight the Battery Voltscheckbox.  
3. Pressing ENTER will insert or remove a check mark in the checkbox.  
To set the Battery Volts Alarm:  
1. Highlight the Battery Volts’ field and press ENTER.  
2. Use the Arrow Keys to input the desired voltage, then press ENTER to  
accept the setting.  
System Tab  
The Systab contains the Contrast,’ ‘Beeper,’ ‘NMEA Outputand  
Languagesetups. To access the Systab, use the arrow keys to highlight it.  
Battery Volts Alarm  
Contrast  
The display Contrastmay need to be adjusted to compensate for light  
levels or viewing angles.  
To adjust the Contrast:  
1. Highlight the Systab on the Setup Menu.  
2. Highlight the ContrastAdjustment eld and press ENTER.  
3. Using the Arrow Keys, move the slider right to darken the screen or  
left to lighten the screen. When nished, press ENTER to accept the  
setting.  
Contrast Adjustment Slider  
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25  
Beeper  
The Beeper’ field contains three settings: Off,’ ‘Alarms Only,and Key  
& Alarm.’  
Unit Operation  
To change the Beeper Setting:  
1. Highlight the Systab on the Setup Menu.  
2. Highlight the Beeper’ field and press ENTER.  
Setup Menu: System Tab  
3. Choose Off,Alarms Only,or Key, Alarm,then press ENTER to accept  
the setting.  
NMEA Output  
The Fishnder 100 Blue has the ability to output information about  
Depth, Speed, and Water Temp for display on another NMEA-compatible  
device.  
To activate/deactivate the NMEA Output:  
1. Highlight the Systab on the Setup Menu.  
2. Highlight the NMEA Output’ field and press ENTER.  
3. Choose Offor On,then press ENTER to accept the setting.  
Language  
Beeper Selections  
To select a Language:  
1. Highlight the Systab on the Setup Menu.  
2. Highlight the Language’ field and press ENTER.  
3. Use the Arrow Keys to select the desired language from the list and  
press ENTER to accept the setting.  
NMEA Output Selections  
26  
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Calibrations Tab  
The Caltab contains the Keel Offsetand Water Typesetups, and a  
Calibrate Speedfunction for use when a speed sensor is installed.  
Unit Operation  
Keel Offset  
The Keel Offset’ field allows the user to offset the depth reading for a  
keel or for the draw on a larger vessel.  
Setup Menu: Calibrations Tab  
To set a Keel Offset:  
1. Highlight the Caltab on the Setup Menu.  
2. Highlight the Keel Offset’ field and press ENTER.  
3. Use the Arrow Keys enter a new offset, then press ENTER to accept.  
Water Type  
Since sound waves travel through fresh and salt water at different rates,  
it is necessary to select the Water Typeto ensure accurate depth readings.  
To change the Water Type:  
1. Highlight the Caltab on the Setup Menu.  
2. Highlight the Water Typeselection eld and press ENTER.  
3. Choose Freshor Salt,then press ENTER to accept the selection.  
Calibrate Speed  
The Calibrate Speed’ field will be enabled when a speed sensor is  
installed or when you are in simulator mode. This allows you to calibrate  
the Fishnder speed to your boats speedometer or to your GPS speed.  
To calibrate the Speed:  
1. Highlight the Caltab on the Setup Menu.  
Transducer at Surface  
Enter (+) positive number to show  
depth from bottom of keel  
2. Highlight the Calibrate Speedbutton and press ENTER.  
3. Run your boat, noting your top speed. Stop the boat and press ENTER.  
4. With the speed eld highlighted, press ENTER and input your top  
Transducer at Bottom of Keel  
Enter (-) negative number to show  
depth from surface  
27  
speed. Highlight OKand press ENTER to nish the calibration.  
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Units Tab  
The Unitstab contains settings for Depth,’ ‘Temperatureand Speed.’  
To access the Unitstab, use the arrow keys to highlight it.  
Unit Operation  
Depth  
The Depth’ field can be congured to display in Feet (ft), Meters (mt)  
or Fathoms (fa).  
Setup Menu: Units Tab  
To select a Depth Unit:  
1. Highlight the Unitstab on the Setup Menu.  
2. Highlight the Depth’ field and press ENTER.  
3. Select Feet,’ ‘Metersor Fathoms,then press ENTER to accept the  
new setting.  
Temperature  
If equipped with a temperature capable transducer or separate  
temperature sensor, the unit can display water temperature in Fahrenheit  
(°F) or Celsius (°C).  
To Select a Temperature Unit:  
1. Highlight the Unitstab on the Setup Menu.  
2. Highlight the Temperature’ field and press ENTER.  
Depth Selections  
Temperature  
Selections  
3. Select Fahrenheitor Celsius,then press ENTER to accept the new  
setting.  
Speed  
If equipped with a speed sensor, the unit can display the boats Speed’  
Over Water. The unit can be congured to display Miles-Per-Hour(mh),  
Kilometers-Per-Hour(kh), or Nautical Miles-Per-Hour(kt).  
To select a Speed Unit:  
1 Highlight the Unitstab on the Setup Menu.  
2. Highlight the Speed’ field and press ENTER.  
Speed Selections  
3. Select Miles/hr,’ ‘Kilom/hror Knots,then press ENTER to accept the  
new setting.  
28  
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Memory Tab  
The Memtab contains the settings for unit memory and allows you to  
reset the unit to the factory settings and review the software version. To  
access the Memorytab, use the arrow keys to highlight it.  
Unit Operation  
Remember  
Setup Menu: Memory Tab  
The Fishnder 100 Blue can be set to remember its settings each time  
you power it on. You can set it to remember the settings in the Setup  
Menu (Setup Only) or the units settings in both the Setup Menu and the  
Adjustment Bar (All).  
To select a Memory Setting:  
1. Highlight the Memtab on the Setup Menu.  
2. Highlight the Remember’ field and press ENTER.  
3. Choose Allor Setup Only,then press ENTER to accept the selection.  
Factory Setup  
To restore the Factory Settings:  
Remember Selections  
Restore  
Factory Settings  
1. Highlight the Memtab on the Setup Menu.  
2. Highlight the FactorySetup button and press ENTER.  
3. Choose OKto reset the unit or Cancelto abort.  
Software Version  
The Software VersionButton will report information about the current  
software version in the unit and display the Unit ID Number.  
To activate the Software Version Window:  
1. Highlight the Memtab on the Setup Menu.  
2. Highlight the Software Versionbutton and press ENTER.  
3. Press ENTER to close the information window.  
Software Version Information  
29  
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Understanding Sonar  
If you are unfamiliar with sonar, or need help determining what is  
displayed on the chart, then this section may be for you. This section  
is intended to help the novice user gain some understanding of how the  
Fishfinder 100 Blue operates and how it can help improve their fishing  
productivity.  
On the Water  
Unit Operation and the Chart  
To understand what the unit is displaying, it is important to have a  
general knowledge of how the unit works and how it determines what to  
display. Briefly described, the unit operates by transmitting sound waves  
toward the bottom of a lake, stream or seabed in a cone shaped pattern.  
When a transmitted sound wave strikes an underwater object such as the  
bottom, a piece of structure, or a fish, sound is reflected back to the  
transducer. The transducer collects the reflected sound waves and sends  
the data to the unit to be processed and displayed on the chart. The  
underwater data is displayed on the chart in the order that it is returned:  
first returnedfirst on the chart.  
1
2
2
1
3
3
The diagram in the sidebar demonstrates this, showing an underwater  
scene as it would be displayed on the chart. Generally speaking, if the only  
thing between the transducer and the bottom is water, the first strong  
return will come from the bottom directly below the transducer. This first  
strong return sets the bottom level. Weaker secondary returns provide the  
detailed data. Stronger returns will display in darker colors, black being  
the strongest return.  
This fish is currently in a Dead Zone and is not detected  
by the sonar. The fish is in the coverage area of the  
transducer, but remember the first strong return sets the  
bottom level. The fish will never be detected since the  
bottom level will never be set below the fish.  
30  
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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 50kHz frequency  
provides a 40° cone angle, with a coverage width that is approximately 2/3  
of the water depth. As shown in the sidebar, the 40° cone angle (50kHz  
frequency) approximately covers the area of a 20 foot diameter circle at a  
30 foot depth. The 200kHz frequency provides a 10° cone angle, with a  
coverage width that is approximately 2/10 of the water depth. As shown,  
the 10° cone angle (200kHz frequency) approximately covers the area of a  
6 foot diameter circle at a 30 foot depth.  
On the Water  
Transducer Coverage  
When using the Fishfinder 100 Blue in Dualfrequency mode, the unit  
transmits both 50kHz and 200kHz signals at the same time. The Dual’  
frequency capability of the Fishfinder 100 Blue allows the user to have  
a large coverage area and still retain good bottom resolution. When in  
Dualfrequency mode the unit uses the 200kHz to display detailed bottom  
information, keeping Dead Zonesto a minimum, and the 50kHz signal  
for the large coverage area.  
200kHz - 10˚ Cone Angle  
72" coverage at 30'  
50kHz - 40˚ Cone Angle  
20' coverage at 30'  
Fish returns from the 50kHz and 200kHz beams will appear differently  
on the display. The 50kHz beam tends to show longer fish returns than  
the 200kHz beam. The examples below show simulated fish returns at  
50 and 200 kHz.  
50kHz  
200kHz  
31  
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Understanding the Chart  
It is important to understand that the unit does not display a 3-D  
representation of the underwater environment. The unit can display mul-  
tiple things at the same time, but cannot determine from where the return  
originated. It can only determine when the return was received.  
On the Water  
Understanding the Chart  
Examples 1and 2 provides a look at the underwater world from a top  
view, and illustrate how these views would be displayed on the chart. On  
both charts it appears the sh and tree are side by side as shown in Example  
1. However, when we look at Example 2., we see that the sh can be  
several feet from the tree. It is important to remember that the Fishnder  
cannot determine where in the coverage area the tree or sh are, only that  
the returns were received from the same depth.  
Remember that the Fishnder displays a 2D picture  
of the underwater environment. The sh and tree  
could be located anywhere in the coverage area  
produced by the sonar cone at the objects indicated  
depth.  
Branches  
Branches  
arged  
Transducer  
View  
Enlarged  
Transducer  
View  
Fish  
Fish  
Example 1.  
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Example 2.  
32  
Whiteline  
The Fishnder 100 Blue can help you to determine if the bottom is  
hard or soft. When the sonar soundwaves are reected back by the bottom,  
a hard bottom will return a stronger signal than a soft bottom. The stronger  
the bottom return, the wider the bottom layer is displayed. The unit uses  
the Whiteline function to make this bottom layer information easier to  
distinguish.  
On the Water  
Understanding the Chart  
When viewing the display without Whiteline active, the bottom return  
is black. While you can make some determination of the bottom type,  
the black return makes this more difcult. With the Whiteline active, the  
bottom return appears layered in shades of gray and black, which makes  
determining the bottom type easier and more reliable. Example 3 shows  
the bottom return with and without the Whiteline activated.  
Whiteline can also help you to determine the type of  
bottom structure that is displayed on the chart. By  
determining the hardness of the structure you can  
make a better informed decision as to the type of  
structure.  
Whiteline  
Structure is hard, probably a  
rock or stump  
Structure is soft, probably a  
mud pile  
Whiteline Activated  
Whiteline Turned Off  
Example 2.  
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33  
Thermoclines  
A rough denition of a thermocline is a break in water where the  
water temperature changes at a faster rate than the water above it. The  
thermocline is usually displayed as a gray level, as shown below.  
On the Water  
One of the unique features offered by GARMIN is See-Thru technology.  
A benefit of See-Thru technology is that it allows the Fishfinder 100 Blue  
to see fish inside thermoclines.  
Understanding the Chart  
Thermocline  
34  
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Simulator Mode  
The Fishfinder 100 Blue comes with a built-in simulator. While in  
simulator mode, the unit will display a random bottom scene, and the  
Fishfinder 100 Blue can be controlled just as if it were on the water. Using  
simulator mode allows the user to practice and learn the operation of the  
unit at home rather than on the water.  
On the Water  
Simulator Mode  
If the Fishfinder 100 Blue is turned on without a transducer connected,  
the unit will start in simulator mode. Also the unit can be switched into  
simulator mode by selecting one of the simulated transducer options from  
the Simulator Selectionfield as described below. The unit will indicate that  
it is running in simulator mode by displaying a message across the bottom  
of the screen. The message will be replaced by the Ssimulator mode icon  
in the lower left corner of the screen.  
The unit can be configured to act as if a variety of transducers are  
installed while in the simulator mode.  
Simulator Message and Icon  
To select a specic Transducer:  
1. Press the SETUP button on the face of the unit.  
2. Using the Arrow keys, highlight the Toolstab then the Simulator’  
selection eld.  
3. Press ENTER. Choose the desired transducer from the list.  
4. Press ENTER to accept the transducer selection.  
Simulator Transducer Selections  
35  
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Physical  
Case: Fully gasketed, high-impact plastic alloy  
AppendixA
Display: 3.3x 2.0(8.3 x 5 cm) 160 H x 100 W pixels, FSTN LCD with  
amber LED backlighting  
Size: 4.93H x 6.3W x 2.7D (12.5 x 13.5 x 6.9 cm)  
Weight: 13 oz.  
Specications  
Temperature Range: +5° to 158°F (-15°C to 70°C)  
Waterproof: IEC 529, level IPX-7 (submerged to 1 meter for 30 minutes)  
Power  
Input: 10 to 18 VDC with High Voltage Protection  
Usage: 7 watts maximum  
Nominal: 12 VDC @ 0.28 amps  
Performance  
Sonar Power Output: 300 watts (RMS), 2400 watts (peak to peak)  
Frequency: 200/50 kHz (10°/40°)  
Depth 1200 foot max depth*  
NMEA  
Support: NMEA 0183 Versions 2.0 - 2.3  
Output Sentences: DBT, DPT, NTW, VHW  
* Depth capability is dependent on water salinity, bottom type and other water  
conditions.  
Specications subject to change without notice.  
36  
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Alarm Messages and Icons  
The Fishfinder 100 Blue displays a message when an alarm is tripped.  
To clear the message, press the ENTER key. If the ENTER key is not  
pressed, the unit will automatically remove most messages after 10 seconds  
and display a reminder icon in the lower left corner of the chart until the  
alarm is no longer valid.  
AppendixB
Messages and Alarms  
Unit Needs Repair  
Unit Needs Repair  
Battery Voltage Low  
Deep Water Alarm  
Shallow Water Alarm  
Supply Voltage Low  
Supply Voltage High  
Memory Deleted  
Increase Battery Voltage  
Alarm Setting  
Fish Alarm  
37  
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Customer Service .................................................................................i  
D
Deep Water Alarm.............................................................................24  
Depth Number.............................................................................22-23  
Depth Range......................................................................................12  
Depth Scale .......................................................................................18  
Depth Units.......................................................................................28  
Display......................................................................................... vi, 11  
Display Installation...........................................................................7-8  
Index  
A
Accessories.........................................................................................iii  
Adjustment Bar ........................................................................... 12-14  
Alarm Messages.................................................................................37  
Alarm Tab.............................................................................. 23-25, 37  
Arrow Keys........................................................................................10  
E
Enter Key ..........................................................................................10  
F
Factory Setup....................................................................................29  
Fish Alarm ........................................................................................23  
Fish Symbols................................................................................16-17  
Flasher ..............................................................................................19  
Flush Mounting the Display ................................................................8  
Frequency ....................................................................................15-16  
B
Battery...............................................................................................37  
Battery Voltage Alarm........................................................................25  
Battery Voltage Display......................................................................21  
Beeper...............................................................................................26  
Bottom Structure.................................................................... vi, 32-33  
G
Gain Adjustment ...............................................................................14  
Graphic Flasher.................................................................................19  
C
Calibrate Speed .................................................................................27  
Calibrations Tab ................................................................................27  
Chart. ......................................................................................... 32-34  
Chart Tab .................................................................................... 15-18  
Contrast ............................................................................................25  
I
In-Hull Installation..............................................................................3  
Installing the Display........................................................................7-8  
Installing the Speed Sensor..................................................................4  
Installing the Transducer ..................................................................2-4  
Installing the Wiring Harness ...........................................................5-6  
38  
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K
Keel Offset.........................................................................................27  
Keypad..............................................................................................10  
L
Language...........................................................................................26  
Limited Warranty ................................................................................ii  
Index  
M
S
Memory Tab......................................................................................29  
Messages ...........................................................................................37  
Mounting the Display...................................................................... 7-8  
Mounting the Speed Sensor.................................................................4  
Mounting the Transducer ................................................................ 2-4  
Scale.................................................................................................18  
Scroll Speed .....................................................................................17  
Setup Key.........................................................................................10  
Setup Menu.................................................................................15-29  
Shallow Water Alarm........................................................................24  
Simulator ...................................................................................19, 35  
Software Version...............................................................................29  
Sonar. ..............................................................................................30  
Specications ...................................................................................36  
Speed Calibration.............................................................................27  
Speed Display...................................................................................22  
Speed Sensor Installation....................................................................4  
Speed Units......................................................................................28  
Surface Mounting the Display.............................................................7  
System Tab..................................................................................25-26  
N
NMEA Output...................................................................................26  
Noise Reject ................................................................................ 19-20  
Number Size .....................................................................................20  
Numbers Tab............................................................................... 20-23  
O
Operation..........................................................................................30  
P
Packaging...........................................................................................iii  
Power Key.........................................................................................10  
Product Registration.............................................................................i  
T
Table of Contents ........................................................................... iv-v  
Temperature Display ........................................................................21  
Temperature Units............................................................................28  
Testing the Installation .......................................................................9  
Thermocline................................................................................ vi, 34  
R
Range Adjustment .............................................................................12  
Remember Settings............................................................................29  
Restore Factory Settings ....................................................................29  
39  
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Index  
T
Tools Tab.....................................................................................19-20  
Transducers............................................................................1, 31, 35  
Transom Mount Installation ...............................................................2  
U
Understanding Sonar........................................................................30  
Understanding the Chart.............................................................32-34  
Units Tab..........................................................................................28  
V
View Adjustment..............................................................................13  
W
Warranty ............................................................................................ii  
Water Depth................................................................................ vi, 28  
Water Temperature...................................................................... vi, 28  
Water Type .......................................................................................27  
Whiteline ...................................................................................17, 33  
Wiring Harness Installation.............................................................5-6  
Z
Zoom Adjustment ............................................................................13  
40  
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© 2001 GARMIN Corporation  
GARMIN International, Inc.  
1200 East 151st Street, Olathe, Kansas 66062, U.S.A.  
GARMIN (Europe) Ltd.  
Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9AQ, U.K.  
GARMIN Corporation  
No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan  
www.garmin.com  
Part Number 190-00198-00 Rev. A  
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