Lowrance electronic Fish Finder Fish Finder User Manual

Pub. 988-0152-28A  
M52 Pro  
Fish-finding Sonar & GPS Plotter  
Installation and Operation  
Instructions  
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Table of Contents  
Section 1: M52 Pro Specifications ......................................... 5  
How to use this manual: typographical conventions.................. 6  
Section 2: Installation & Accessories.................................... 7  
Preparations .................................................................................. 7  
Transducer Installation................................................................ 7  
Recommended Tools and supplies............................................ 8  
Selecting a Transducer Location.............................................. 8  
Shoot-thru-hull vs. Transom Mounting................................. 10  
Hulls With Floatation Materials............................................ 16  
Shoot-thru-hull Installation ................................................... 18  
Power and Cable Connections ............................................... 19  
Mounting the Sonar Unit: In-Dash or Bracket..................... 21  
Portable Transducer Assembly .............................................. 25  
Section 3: Basic Sonar Operation....................................... 27  
Keyboard...................................................................................... 27  
Main Menu............................................................................... 28  
Main Menu Commands....................................................... 28  
Sonar Menu.............................................................................. 29  
Sonar Menu Commands.......................................................... 29  
Basic Sonar Quick Reference ..................................................... 30  
Pages ............................................................................................ 31  
Sonar Operations ........................................................................ 32  
Section 4: Sonar Options & Other Features..................... 35  
ASP(Advanced Signal Processing)..................................... 35  
Alarms.......................................................................................... 35  
Chart Speed................................................................................. 38  
Depth Cursor ............................................................................... 38  
Depth Range - Automatic ........................................................... 39  
Depth Range - Manual................................................................ 39  
Depth Range - Upper and Lower Limits ................................... 40  
FasTrack................................................................................... 41  
Fish I.D.(Fish Symbols & Depths)......................................... 41  
FishTrack.................................................................................. 42  
Grayline® ..................................................................................... 42  
Overlay Data ............................................................................... 43  
Ping Speed & HyperScroll....................................................... 44  
Reset Options............................................................................... 45  
Sensitivity & Auto Sensitivity.................................................... 45  
Keel and Waterline Offset .......................................................... 46  
Sonar Color Mode........................................................................ 47  
Sonar Chart Display Options ..................................................... 47  
Full Sonar Chart ..................................................................... 47  
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Split Zoom Sonar Chart .......................................................... 48  
Digital Data/Chart .................................................................. 48  
Flasher ..................................................................................... 49  
Pro Tips........................................................................................ 49  
Sonar Simulator .......................................................................... 49  
Stop Chart.................................................................................... 50  
Surface Clarity ............................................................................ 50  
Zoom Pan ..................................................................................... 50  
Section 5: Sonar Troubleshooting ....................................... 51  
Section 6: Basic GPS Operations ......................................... 53  
Main Menu................................................................................... 53  
Pages ............................................................................................ 54  
Sonar Pages ............................................................................. 54  
Satellite Status Page............................................................... 54  
Navigation Page ...................................................................... 55  
Position Page ........................................................................... 57  
Plotter Page ............................................................................. 57  
GPS Quick Reference.................................................................. 60  
Cancel Navigation....................................................................... 61  
Waypoints .................................................................................... 61  
Find a Waypoint.......................................................................... 64  
Navigate To a Waypoint ............................................................. 65  
Set Man Overboard (MOB) Waypoint........................................ 66  
Navigate Back to MOB Waypoint.............................................. 67  
Trails............................................................................................ 67  
Navigate a Trail .......................................................................... 70  
Icons ............................................................................................. 73  
Routes .......................................................................................... 74  
Utilities ........................................................................................ 79  
Section 7: System & GPS Setup Options............................ 81  
Alarms.......................................................................................... 81  
Auto Satellite Search .................................................................. 82  
Coordinate System Selection...................................................... 83  
Map Fix........................................................................................ 84  
Customize Page Displays............................................................ 85  
GPS Simulator............................................................................. 85  
Hide GPS Features ..................................................................... 86  
Initialize GPS .............................................................................. 86  
Plotter Auto Zoom ....................................................................... 86  
Plotter Orientation...................................................................... 87  
Overlay Data ............................................................................... 87  
Pop-up Help ............................................................................. 89  
Position Pinning.......................................................................... 89  
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Reset Options............................................................................... 90  
Screen Contrast and Brightness ................................................ 90  
Set Language............................................................................... 91  
Set Local Time............................................................................. 91  
Show WAAS Alarm ..................................................................... 91  
Software Version Information.................................................... 92  
Sounds and Alarm Sound Styles................................................ 92  
Track Smoothing ......................................................................... 93  
Trail Options................................................................................ 93  
Units of Measure......................................................................... 95  
Index ........................................................................................... 97  
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WARNING!  
A CAREFUL NAVIGATOR NEVER RELIES ON ONLY ONE METHOD  
TO OBTAIN POSITION INFORMATION.  
CAUTION  
When showing navigation data to a position (waypoint), a GPS unit will show  
the shortest, most direct path to the waypoint. It provides navigation data to the  
waypoint regardless of obstructions. Therefore, the prudent navigator will not  
only take advantage of all available navigation tools when traveling to a way-  
point, but will also visually check to make sure a clear, safe path to the waypoint  
is always available.  
WARNING!  
When a GPS unit is used in a vehicle, the vehicle operator is solely re-  
sponsible for operating the vehicle in a safe manner. Vehicle operators  
must maintain full surveillance of all pertinent driving, boating or flying  
conditions at all times. An accident or collision resulting in damage to  
property, personal injury or death could occur if the operator of a GPS-  
equipped vehicle fails to pay full attention to travel conditions and vehi-  
cle operation while the vehicle is in motion.  
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Section 1: M52 Pro Specifications  
General  
Display: ............................High-contrast Film SuperTwist LCD. Diago-  
nal viewing area: 3.5" (8.9 cm).  
Resolution: ......................160 pixel x 240 pixel resolution; 38,400 total  
pixels.  
Backlighting: ..................LED backlit screen with multiple lighting lev-  
els; backlit keypad.  
Input power: ...................10 to 17 volts DC.  
Current drain:................170 ma lights off; 240 ma lights on.  
Case size: .........................5.8" H x 4.3" W x 2.5" D (14.7 cm H x 10.8 cm  
W x 6.6 cm D) sealed, waterproof; suitable for  
saltwater use.  
Back-up memory:...........Built-in memory stores GPS data for dec-  
ades.  
Languages: ......................10; menu languages selectable by user.  
Sonar  
Frequency: ......................200 kHz.  
Transducer:.......................A Skimmer® transducer comes packed with  
your sonar unit. Its 20° cone angle offers a  
wide fish detection area of up to 60º with  
high sensitivity settings. Operates at boat  
speeds up to 70 mph (61 kts).  
Transmitter:....................800 watts peak-to-peak; 100 watts RMS.  
Sonar sounding  
depth capability:............600 feet (180 meters). Actual capability de-  
pends on transducer configuration and instal-  
lation, bottom composition and water condi-  
tions. All sonar units typically read deeper in  
fresh water than in salt water.  
Depth display: ................Continuous display.  
Audible alarms:..............Deep/shallow/fish/zone.  
Automatic ranging:.......Yes, with instant screen updates.  
Auto bottom track:........Yes  
Zoom bottom track:.......Yes.  
Split-screen zoom:.........Yes.  
Surface water temp: .....Yes, built into transducer.  
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GPS  
Receiver/antenna: .........Internal 12 parallel channel GPS/WAAS.  
Position updates:...........Every second.  
Position points:..............1,000 waypoints; 1,000 event marker icons.  
Man Overboard:.............MOB feature precisely marks man overboard  
location with special icon, then automatically  
displays navigation data to that position.  
Audible alarms:..............Arrival/off-course/destination passed/anchor.  
Graphic symbols for  
waypoints or event  
marker icons:..................42.  
Routes: .............................100; up to 100 waypoints per route.  
Plot Trails:.......................10 savable; up to 9,999 points per trail.  
Zoom range: ....................39 ranges; 0.02 to 4,000 miles.  
NOTICE!  
The storage and operation temperature range for your unit is from  
-4 degrees to +167 degrees Fahrenheit (-20 degrees to +75 degrees  
Celsius). Extended storage or operation in temperatures higher or  
lower than specified will damage the liquid crystal display in your  
unit. This type of damage is not covered by the warranty. For more  
information, contact the factory's Customer Service Department;  
phone numbers are listed on the last page.  
How to use this manual: typographical conventions  
Most functions you perform with this unit are described as a sequence  
of key strokes and selecting menu commands. Instructions for navigat-  
ing a trail would look like this:  
1. From the Plotter Page, press MENU|MENU|to MY TRAILS|ENT.  
2. Press to Trail 1|ENT||to NAVIGATE|ENT.  
Here is what the instructions mean:  
Step 1: "From the Plotter Page. Press the Menu key twice. Use down ar-  
row keys to select My Trails on the menu. Press the Enter key."  
Step 2: "Use the down arrow key select the trail named Trail 1, and  
press Enter. Press the right arrow key and then the down arrow key to  
highlight the Navigate command. Press Enter."  
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Section 2:  
Installation & Accessories  
Preparations  
You can install the sonar and GPS systems in some other order if you  
prefer, but we recommend this installation sequence:  
CAUTION:  
You should read over this entire installation section before drill-  
ing any holes in your vehicle or vessel!  
1. Determine the approximate location for the sonar/GPS unit, so you  
can plan how and where to route the power/transducer cable. This will  
help you make sure you have enough cable length for the desired con-  
figuration.  
2. Determine the approximate location for the transducer and its cable  
route.  
3. Determine the location of your battery or other power connection,  
along with the power cable route.  
4. Install the transducer and route the transducer cable to the so-  
nar/GPS unit.  
5. Route the power cable from the unit's location to an appropriate  
power source and connect it there.  
6. Connect the transducer/power cable to the unit and mount the so-  
nar/GPS unit to the bracket.  
Transducer Installation  
These instructions will help you install your Skimmer® transducer on a  
transom, on a trolling motor or inside a hull. Please read all instruc-  
tions before proceeding with any installation.  
Your Skimmer transducer typically comes packaged with a one-piece  
stainless steel bracket for mounting it to the transom of your boat. The  
optional trolling motor mount uses a one-piece plastic bracket with an  
adjustable strap. These are "kick-up" mounting brackets. They help pre-  
vent damage if the transducer strikes an object while the boat is moving.  
If the transducer does "kick-up," the bracket can easily be pushed back  
into place without tools.  
Read these instructions carefully before attempting the installation.  
Determine which of the installation methods is right for your boat.  
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Remember, the transducer location and installation is the most  
critical part of a sonar installation.  
Recommended Tools and supplies  
If you prefer the option of routing the cable through the transom, you will  
need a 5/8" drill bit.  
NOTE:  
The following installation types also call for these recommended  
tools and required supplies that you must provide (supplies listed  
here are not included):  
Transom installation  
Tools include: two adjustable wrenches, drill, #29 (0.136") drill bit, flat-  
head screwdriver. Supplies: high quality, marine grade above- or below-  
waterline sealant/adhesive compound.  
Trolling motor installations  
Tools: two adjustable wrenches, flat-head screwdriver. Supplies: plastic  
cable ties.  
Shoot-through hull installations  
Tools: these will vary depending on your hull's composition. Consult your  
boat dealer or manufacturer. Other tools are a wooden craft stick or  
similar tool for stirring and applying epoxy, and a paper plate or piece  
of cardboard to mix the epoxy on. Supplies: rubbing alcohol, 100 grit  
sandpaper, specially formulated epoxy adhesive available from LEI (see  
ordering information on the inside back cover). A sandwich hull also  
requires polyester resin.  
Selecting a Transducer Location  
1. The location must be in the water at all times, at all operating speeds.  
2. The transducer must be placed in a location that has a smooth flow  
of water at all times. If the transducer is not placed in a smooth flow  
of water, interference caused by bubbles and turbulence will show on  
the sonar's display in the form of random lines or dots whenever the  
boat is moving.  
NOTE:  
Some aluminum boats with strakes or ribs on the outside of the  
hull create large amounts of turbulence at high speed. These boats  
typically have large outboard motors capable of propelling the boat  
at speeds faster than 35 mph. Typically, a good transom location on  
aluminum boats is between the ribs closest to the engine.  
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3. The transducer should be installed with its face pointing straight  
down, if possible. For shoot-thru applications: Many popular fishing  
boat hulls have a flat keel pad that offers a good mounting surface. On  
vee hulls, try to place the transducer where the deadrise is 10° or less.  
Deadrise less than 10°  
Strakes  
Pad  
Left, vee pad hull; right, vee hull. A pod style transducer is shown  
here, but the principle is the same for Skimmers inside a hull.  
4. If the transducer is mounted on the transom, make sure it doesn't  
interfere with the trailer or hauling of the boat. Also, don't mount it  
closer than approximately one foot from the engine's lower unit. This  
will prevent cavitation (bubble) interference with propeller opera-  
tion.  
5. If possible, route the transducer cable away from other wiring on the  
boat. Electrical noise from engine wiring, bilge pumps and aerators  
can be displayed on the sonar's screen. Use caution when routing the  
transducer cable around these wires.  
CAUTION: Clamp the trans-  
ducer cable to transom near  
the transducer. This will help  
prevent the transducer from  
entering the boat if it is  
knocked off at high speed.  
Good location  
Poor location  
Good  
location  
Good location  
Poor angle  
Good and poor transducer locations.  
How low should you go?  
For most situations, you should install your Skimmer transducer so  
that its centerline is level with the bottom of the boat hull. This will  
usually give you the best combination of smooth water flow and protec-  
tion from bangs and bumps.  
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Transom  
Transducer  
centerline  
Hull bottom  
Align transducer centerline with hull bottom.  
However, there are times when you may need to adjust the transducer  
slightly higher or lower. (The slots in the mounting brackets allow you  
to loosen the screws and slide the transducer up or down.) If you fre-  
quently lose bottom signal lock while running at high speed, the trans-  
ducer may be coming out of the water as you cross waves or wakes.  
Move the transducer a little lower to help prevent this.  
If you cruise or fish around lots of structure and cover, your transducer  
may be frequently kicking up from object strikes. If you wish, you may  
move the transducer a little higher for more protection.  
There are two extremes you should avoid. Never let the edge of the  
mounting bracket extend below the bottom of the hull. Never let the  
bottom – the face – of the transducer rise above the bottom of the hull.  
Shoot-thru-hull vs. Transom Mounting  
In a shoot-thru-hull installation, the transducer is bonded to the inside  
of the hull with epoxy. The sonar "ping" signal actually passes through  
the hull and into the water. This differs from a bolt-thru-hull installa-  
tion (often called simply "thru-hull"). In that case, a hole is cut in the  
hull and a specially designed transducer is mounted through the hull  
with a threaded shaft and nut. This puts the transducer in direct con-  
tact with the water.  
Typically, shoot-thru-hull installations give excellent high speed opera-  
tion and good to excellent depth capability. There is no possibility of  
transducer damage from floating objects, as there is with a transom-  
mounted transducer. A transducer mounted inside the hull can't be  
knocked off when docking or loading on a trailer.  
However, the shoot-thru-hull installation does have its drawbacks.  
First, some loss of sensitivity does occur, even on the best hulls. This  
varies from hull to hull, even from different installations on the same  
hull. This is caused by differences in hull lay-up and construction.  
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Second, the transducer angle cannot be adjusted for the best fish  
arches on your sonar display. (This is not an issue for flasher-style  
sonars.) Lack of angle adjustment can be particularly troublesome on  
hulls that sit with the bow high when at rest or at slow trolling speeds.  
Third, a transducer CAN NOT shoot through wood and metal hulls.  
Those hulls require either a transom mount or a thru-hull installation.  
Fourth, if your Skimmer transducer has a built in temp sensor, it will  
only show the temperature of the bilge, not the water surface temp.  
Follow the testing procedures listed in the shoot-thru-hull installation  
section at the end of this lesson to determine if you can satisfactorily  
shoot through the hull.  
TRANSOM TRANSDUCER ASSEMBLY AND MOUNTING  
The best way to install the transducer is to loosely assemble all of the  
parts first, place the transducer's bracket against the transom and see if  
you can move the transducer so that it's parallel with the ground.  
1. Assembling the bracket. Press the two small plastic ratchets into the  
sides of the metal bracket as shown in the following illustration. Notice  
there are letters molded into each ratchet. Place each ratchet into the  
bracket with the letter "A" aligned with the dot stamped into the metal  
bracket. This position sets the transducer's coarse angle adjustment for a  
14° transom. Most outboard and stern-drive transoms have a 14° angle.  
Dot  
Align plastic ratchets in bracket.  
2. Aligning the transducer on the transom. Slide the transducer  
between the two ratchets. Temporarily slide the bolt though the  
transducer assembly and hold it against the transom. Looking at the  
transducer from the side, check to see if it will adjust so that its face  
is parallel to the ground. If it does, then the "A" position is correct for  
your hull.  
If the transducer's face isn't parallel with the ground, remove the  
transducer and ratchets from the bracket. Place the ratchets into the  
holes in the bracket with the letter "B" aligned with the dot stamped  
in the bracket.  
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Reassemble the transducer and bracket and place them against the  
transom. Again, check to see if you can move the transducer so it's  
parallel with the ground. If you can, then go to step 3. If it doesn't,  
repeat step 2, but use a different alignment letter until you can place  
the transducer on the transom correctly.  
Ratchets  
Insert bolt and check transducer position on transom.  
3. Assembling the transducer. Once you determine the correct posi-  
tion for the ratchets, assemble the transducer as shown in the follow-  
ing figure. Don't tighten the lock nut at this time.  
Metal  
washer  
Nut  
Rubber  
washers  
Metal washer  
Bolt  
Assemble transducer and bracket.  
4. Drilling mounting holes. Hold the transducer and bracket assembly  
against the transom. The transducer should be roughly parallel to the  
ground. The transducer's centerline should be in line with the bottom  
of the hull. Don't let the bracket extend below the hull!  
Mark the center of each slot for the mounting screw pilot holes. You  
will drill one hole in the center of each slot. Drill the holes using the  
#29 bit (for the #10 screws).  
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Transom  
Transom  
Position transducer mount on transom and mark mounting holes.  
Side view shown at left and seen from above at right.  
5. Attaching transducer to transom. Remove the transducer from  
the bracket and re-assemble it with the cable passing through the  
bracket over the bolt as shown in the following figures.  
Route cable over bolt and through bracket. Side view shown at left  
and seen from above at right.  
Attach the transducer to the transom. Slide the transducer up or  
down until it's aligned properly with the bottom of the hull as shown  
in the preceding and following figures. Tighten the bracket's mount-  
ing screws, sealing them with the sealant/adhesive compound.  
Adjust the transducer so that it's parallel to the ground and tighten  
the nut until it touches the outer washer, then add 1/4 turn. Don't  
over tighten the lock nut! If you do, the transducer won't "kick-up" if  
it strikes an object in the water.  
Bottom  
of  
hull  
Flat-bottom hull  
Deep-"vee" hull  
Align transducer centerline with hull bottom and attach to transom.  
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6. Route the transducer cable through or over the transom to  
the sonar unit. Make sure to leave some slack in the cable at the  
transducer. If possible, route the transducer cable away from other  
wiring on the boat. Electrical noise from the engine's wiring, bilge  
pumps, VHF radio wires and cables, and aerators can be picked up by  
the sonar. Use caution when routing the transducer cable around these  
wires.  
WARNING:  
Clamp the transducer cable to the transom close to the  
transducer. This can prevent the transducer from enter-  
ing the boat if it is knocked off at high speed.  
If you need to drill a hole in the transom to pass the connector through,  
the required hole size is 5/8".  
Caution:  
If you drill a hole in the transom for the cable, make sure it is  
located above the waterline. After installation, be sure to seal the  
hole with the same marine grade above- or below-waterline seal-  
ant/adhesive used for the mounting screws.  
7. Make a test run to determine the results. If the bottom is lost at  
high speed, or if noise appears on the display, try sliding the trans-  
ducer bracket down. This puts the transducer deeper into the water,  
hopefully below the turbulence causing the noise. Don't allow the  
transducer bracket to go below the bottom of the hull!  
TROLLING MOTOR BRACKET INSTALLATION  
1. Attach the optional TMB-S bracket to the transducer as shown in the  
following figure, using the hardware supplied with the transducer.  
(Note: The internal tooth washer is supplied with the TMB-S.)  
TMB-S bracket  
Internal tooth washer  
Bolt  
Nut  
Flat washer  
Attach motor mounting bracket to transducer.  
2. Slide the adjustable strap supplied with the TMB-S through the slot  
in the transducer bracket and wrap it around the trolling motor. Po-  
sition the transducer to aim straight down when the motor is in the  
water. Tighten the strap securely.  
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3. Route the transducer cable alongside the trolling motor shaft. Use  
plastic ties (not included) to attach the transducer cable to the troll-  
ing motor shaft. Make sure there is enough slack in the cable for the  
motor to turn freely. Route the cable to the sonar unit and the trans-  
ducer is ready for use.  
TRANSDUCER ORIENTATION AND FISH ARCHES  
If you do not get good fish arches on your display, it could be because  
the transducer is not parallel with the ground when the boat is at rest  
in the water or at slow trolling speeds.  
Partial fish arches  
Transducer aimed  
too far forward  
Transducer aimed  
too far back  
Full fish arch  
Proper transducer angle  
Transducer angles and their effects on fish arches.  
If the arch slopes up – but not back down – then the front of the trans-  
ducer is too high and needs to be lowered. If only the back half of the  
arch is printed, then the nose of the transducer is angled too far down  
and needs to be raised.  
NOTE:  
Periodically wash the transducer's face with soap and water to re-  
move any oil film. Oil and dirt on the face will reduce the sensitiv-  
ity or may even prevent operation.  
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SHOOT-THRU-HULL PREPARATION  
Hulls With Floatation Materials  
The transducer installation inside a fiberglass hull must be in an area  
that does not have air bubbles in the resin or separated fiberglass lay-  
ers. The sonar signal must pass through solid fiberglass. A successful  
transducer installation can be made on hulls with flotation materials  
(such as plywood, balsa wood or foam) between layers of fiberglass if  
the material is removed from the chosen area. See the figure below.  
WARNING:  
Do not remove any material from your inner hull unless  
you know the hull's composition. Careless grinding or  
cutting on your hull can result in damage that could  
sink your boat. Contact your boat dealer or manufac-  
turer to confirm your hull specifications.  
Fill with epoxy  
Inner hull  
Flotation material  
Epoxy to hull first  
Outer hull  
Epoxy the transducer to a solid portion of the hull.  
For example, some (but not all) manufacturers use a layer of fiberglass,  
then a core of balsa wood, finishing with an outer layer of fiberglass.  
Removing the inner layer of fiberglass and the balsa wood core exposes  
the outer layer of fiberglass. The transducer can then be epoxied di-  
rectly to the outer layer of fiberglass. After the epoxy cures for 24  
hours, fill the remaining space with polyester resin. When the job is  
finished, the hull is watertight and structurally sound. Remember, the  
sonar signal must pass through solid fiberglass. Any air bubbles in the  
fiberglass or the epoxy will reduce or eliminate the sonar signals.  
Testing Determines Best Location  
Ideally, the shoot-thru transducer should be installed as close to the  
transom as possible, close to the centerline. This will give you the best  
performance during high speed maneuvers.  
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Transducer location  
(trolling speed)  
Transducer location  
(high speed)  
Shoot-thru-hull transducer locations for  
high speed or trolling speed operation.  
To choose the proper location for shoot-thru-hull mounting, follow these  
testing procedures: (You may need a helper to complete these steps.)  
1. Anchor the boat in about 30 feet of water. Add a little water to the sump  
of the boat. Plug the transducer into the sonar unit, turn it on, then  
hold the transducer over the side of the boat in the water. Adjust the  
sensitivity and range controls until a second bottom echo is seen on the  
display. (You'll need to turn off Auto Sensitivity, Auto Depth Range and  
ASP. Try a range setting that is two to three times the water depth.  
The harder (more rocky) the bottom, the easier it will be to get a second  
bottom signal.) Don't touch the controls once they've been set.  
True bottom  
Second bottom  
Manual range setting  
Example of a second bottom signal. Unit is in 30 feet of water, with  
range set at 80 feet and sensitivity set at 87 percent.  
2. Next, take the transducer out of the water and place it in the water in  
the sump of the boat, face down. (The transducer face is shown in the  
figure on the following page.) Notice how the signal strength decreases.  
The second bottom signal will probably disappear and the bottom sig-  
nal intensity will likely decrease.  
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3. Now move the transducer around to find the best location with the  
strongest possible bottom signal. If you find a spot with an acceptable  
bottom signal, mark the location and move on to step 4.  
If you can't get an acceptable bottom signal, try turning up the sensitiv-  
ity by three or five keystrokes and then move the transducer around  
once more. If you find a spot that works, mark it and move on to step 4.  
If you have to turn up sensitivity by more than five keystrokes to get a  
good signal, the transducer should be mounted on the outside of the  
hull. This is especially true if you have to turn sensitivity all the way  
up to get a decent bottom signal.  
4. Most people can get good results by following steps 1 through 3, so this  
step is optional. If you want to make an extra effort to be absolutely  
sure that your selected location will work under all conditions, make a  
test run with the boat on plane and observe the bottom signal. You'll  
need to figure some way to prop the transducer into position while you  
make your test run. (A brick or two might be sufficient to hold it in  
place.)  
5. When you're satisfied with a location, mark it and proceed with  
the installation.  
Shoot-thru-hull Installation  
If you are installing the transducer on a hull with floatation material  
sandwiched within the hull, refer to the text "Hulls With Flotation Ma-  
terials."  
1. Make sure the area is clean, dry and free of oil or grease, then sand  
both the inside surface of the hull and the face of the transducer with  
100 grit sandpaper. The sanded hull area should be about 1-1/2 times  
the diameter of the transducer. The surface of the hull must be flat  
so the entire transducer face is in contact with the hull prior to bond-  
ing. After sanding, clean the hull and transducer with rubbing alco-  
hol to remove any sanding debris.  
WARNING:  
Use only the epoxy available from LEI. It has been for-  
mulated to work with these installation procedures.  
Other epoxy types may be too thin or may not cure to  
the right consistency for optimum transducer perform-  
ance.  
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2. The epoxy consists of the epoxy itself and a hardener. Remove the  
two compounds from the package and place them on the paper plate.  
Thoroughly stir the two compounds together until the mixture has a  
uniform color and consistency. Do not mix too fast or bubbles will  
form in the epoxy. After mixing, you have 20 minutes to complete the  
installation before the epoxy becomes unworkable.  
Spread epoxy here  
Sand this surface  
Epoxy transducer to hull.  
Spread a thin layer of epoxy (about 1/16" or 1.5 mm thick) on the face  
of the transducer as shown in the previous figure. Make sure there  
are no air pockets in the epoxy layer! Then, apply the remaining ep-  
oxy to the sanded area on the hull.  
3. Press the transducer into the epoxy, twisting and turning it to force  
any air bubbles out from under the transducer face. Stop pressing  
when you bottom out on the hull. When you're finished, the face of  
the transducer should be parallel with the hull, with a minimum  
amount of epoxy between the hull and transducer.  
4. Apply a weight, such as a brick, to hold the transducer in place while  
the epoxy cures. Be careful not to bump the transducer while the ep-  
oxy is wet. Leave the weight in place for a minimum of three hours.  
Allow the epoxy to cure for 24 hours before moving the boat.  
5. After the epoxy has cured, route the cable to the sonar unit and it's  
ready to use.  
POWER AND CABLE CONNECTIONS  
The unit works from a 12-volt battery system. For the best results, at-  
tach the power cable directly to the battery. You can attach the power  
cable to an accessory or power buss, however you may have problems  
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with electrical interference. Therefore, it's safer to go ahead and attach  
the power cable directly to the battery.  
CAUTION:  
When using the unit in a saltwater environment, we strongly rec-  
ommend that you shut off the power supply to the power cable  
when the unit is not in use. When the unit is turned off but still  
connected to a power supply, electrolysis can occur in the power ca-  
ble plug. This may result in corrosion of the plug body along with  
the electrical contacts in the cable and the unit's power socket.  
In saltwater environments we recommend you connect the power  
cable to the auxiliary power switch included in most boat designs.  
If that results in electrical interference, or if such a switch is not  
available, we recommend connecting direct to the battery and in-  
stalling an inline switch. This will let you shut off power to the  
power cable when the unit is not in use. When you are not using  
the unit, you should always shut off power to the power cable, es-  
pecially when the power cable is disconnected from the unit.  
Optional power off switch  
for saltwater installations  
To unit  
Black wire  
Red wire with  
12 volt  
3 amp fuse  
battery  
Power and transducer connections for the M52 Pro sonar  
units (direct battery connection shown).  
If possible, keep the power cable away from other boat wiring, espe-  
cially the engine's wires. This will provide the best isolation from elec-  
trical noise. If the cable is not long enough, splice #18 gauge wire onto  
it. The power cable has two wires, red and black. Red is the positive  
lead, black is negative or ground. Make sure to attach the in-line fuse  
holder to the red lead as close to the power source as possible.  
For example, if you have to extend the power cable to the battery or  
power buss, attach one end of the fuse holder directly to the battery or  
power buss. This will protect both the unit and the power cable in the  
event of a short. It uses a 3-amp fuse.  
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WARNING:  
This product must be independently fused with the en-  
closed 3-amp fuse (or equivalent), even if you connect to  
a fused accessory or power buss.  
If a malfunction happens inside the unit, extensive dam-  
age can occur if the enclosed fuse is not used. As with all  
electrical devices, this unit could be damaged to a point  
that it is unrepairable and could even cause harm to the  
user when not properly fused.  
CAUTION:  
Failure to use the enclosed 3-amp fuse will void your warranty! For  
a replacement, use a type 3AG 3-amp fuse.  
This unit has reverse polarity protection. No damage will occur if the  
power wires are reversed. However, the unit will not work until the  
wires are attached correctly.  
MOUNTING THE SONAR UNIT: In-Dash or Bracket  
You can install the sonar unit on the top of a dash with the supplied  
bracket. It can also be installed in the dash with an optional FM-6  
dash-mounting kit.  
In-Dash Installation  
The following figure shows the approximate shape for in-dash mounting  
an M52 Pro. The in-dash adapter kit includes a template for cutting the  
mounting hole and complete installation instructions on instruction sheet  
988-0147-631.  
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Top  
ALWAYS VERIFY DIMENSIONS.  
Cut along this line  
In-dash mounting template for M52 Pro.  
NOTE: This figure is not printed to scale.  
Bracket Installation  
Mount the unit in any convenient location, provided there is clearance  
when it’s tilted for the best viewing angle. You should also make sure  
there is enough room behind the unit to attach the power/transducer  
cable. (See the following drawings, which show the dimensions of a  
mounted M52 Pro sonar unit.)  
Holes in the bracket’s base allow wood screw or through-bolt mounting.  
You may need to place a piece of plywood on the back side of thin pan-  
els to reinforce the panel and secure the mounting hardware.  
Drill a 5/8" (15.9 mm) hole in the dash for the power/transducer cable.  
The best location for this hole is immediately under the mounting  
bracket location. This way, the bracket can be installed so that it covers  
the hole, holds the cable in position and results in a neat installation.  
Some customers, however, prefer to mount the bracket to the side of  
the cable hole — it's a matter of personal preference. After drilling the  
hole, pass the connector up through the hole from under the dash.  
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107.5  
[4.23]  
82.7  
[3.26]  
156  
[6.26]  
12.09 [0.48]  
76.9  
[3.03]  
70.3  
[2.77]  
Millimeter  
[Inch]  
Front view (left) and side view (right) showing dimensions of the M52  
Pro when mounted on quick release bracket.  
If you wish, you can fill in the hole around the cable with a good marine  
sealant compound. (Some marine dealers stock cable hole covers to con-  
ceal the opening.)  
This unit uses a quick release mounting bracket. When you run the  
cable through the hole, make sure you allow enough slack for tilting the  
unit and attaching the connector. (The snug fit of the push-on water-  
proof connector requires some force to attach.) Also be sure there is  
enough cable slack for rotation if you decide to use the optional GBSA-3  
swivel base. The swivel base lets you to rotate the sonar so it can be  
seen from different parts of the boat.  
Align the bracket over the cable hole with the cable slots facing away  
from you and fit the cable through one of the slots. Fasten the bracket  
to the dash using the three screw holes.  
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Ratchet  
Rear  
(away from viewer)  
Screw hole  
Power/transducer cable  
Cable slot  
M52 Pro quick release mounting bracket. Slots in the base allow  
routing the cable from beneath the mount.  
Attach the unit to the bracket by first connecting the power/transducer  
cable. Then, hold the sonar unit vertically and slide it onto the bracket  
from above. (The back of the unit should be touching the front of the  
bracket as you lower it into position.) As you push down, the unit will  
lock into place with a distinct click.  
To adjust the viewing angle, pinch the ratchets with one hand, then tilt  
the unit with your other hand. Release the ratchets and the unit locks  
into the new position. To dismount the unit for storage, press the ratch-  
ets and lift the unit off the bracket.  
Depress  
ratchets to  
release.  
Swivel base  
Adjust viewing angle: use one hand to press and release the spring-  
loaded ratchets while you move the unit with the other hand. An op-  
tional GBSA-3 swivel base is shown with the quick release bracket.  
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Portable Sonar Installation  
Like many Lowrance products, the M52 Pro sonar is capable of portable  
operation. It uses the optional PPP-12 portable power pack.  
The power pack and portable transducers expand the uses for your so-  
nar. An alternative to the PPP-12 is the PPP-15 portable power pack,  
which was designed especially for ice fishing. It includes a rechargeable  
gel cell battery and a transducer designed for stationary use.  
The PPP-12 package includes the power pack, battery adapter and a port-  
able transducer. The transducer can be stored inside the power pack. The  
PPP-12 requires eight AA alkaline batteries. Batteries are not included.  
Installing the Batteries  
Release the latch on the front of the power pack case. Open the com-  
partment and install eight AA batteries into the adapter. For the long-  
est life, we recommend you use alkaline batteries.  
After installing the batteries, plug the cable's power connector into the  
socket on the battery compartment cover. Route the cable's unit con-  
nector and about 6 inches of cable through the opening under the sonar  
mount. Close the cover, plug the connector into the sonar unit and  
mount the unit on the built-in bracket.  
In cold weather the efficiency of dry cell batteries drops with the tem-  
perature. We find it a good idea to have the sonar unit good and warm  
along with the batteries before we leave home.  
WARNING:  
Never heat the batteries over an open flame or direct  
hot air onto them. A fire or explosion could result.  
Portable Transducer Assembly  
Recommended tools for installation include a slotted screw driver and  
two adjustable wrenches.  
Assemble the transducer and bracket as shown in the following figure.  
Attach the transducer to the bracket with the supplied hardware.  
Make sure there is one washer on each side of the transducer, inside  
the bracket. Slide the other washer over the end of the bolt and thread  
the nut onto it.  
Screw the suction cup onto the bracket using the supplied screw and flat  
washer. Tie the nylon cord through the hole in the top of the bracket.  
When using this transducer, tie the other end of the nylon cord to the  
boat. This will help prevent the loss of the transducer if it comes off the  
boat.  
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Tie nylon  
cord here  
Screw  
Suction  
cup  
Nut  
Bolt  
Washer  
Transducer  
Washer  
Portable transducer assembly: rear view (left) and side view (right.)  
Clean the chosen area of the hull before attaching the suction cup. Lo-  
cate the transducer on the hull as shown in the following figure. Don't  
allow the bracket to extend below the hull, because water pressure  
against it can cause the suction cup to come off at speed.  
Moisten the cup, then press it onto the hull as firmly as possible. Tie  
the nylon cord to the boat and route the transducer cable to the sonar  
unit. Your portable sonar is now ready for use.  
Suction  
Bracket  
cup  
Hull  
Transducer  
Portable transducer installed on boat transom.  
NOTE:  
For optimum operation, the portable transducer should be adjusted  
so that it is parallel to the ground. For more information on this,  
see the earlier segment on Transducer Orientation and Fish  
Arches.  
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Section 3:  
Basic Sonar Operation  
Keyboard  
Numbers in the photo correspond to key explanations below.  
2
3
7
6
4
8
1
9
5
Lowrance M52 Pro Sonar.  
1. PWR/LIGHT – The PWR key turns the unit on and off and activates  
the backlight. Depress the PWR key for 3 seconds to turn off the unit.  
2. PAGES – Pressing this and the arrow keys (4) switches the unit be-  
tween the different page display screens.  
3. MENU – Press this key to show the menus and submenus, which  
allow you to select a command or adjust a feature. This also accesses  
search functions for streets, intersections, addresses and highway exits.  
4. ARROW KEYS – These keys are used to navigate through the  
menus, make menu selections, move the plotter cursor and sonar chart  
cursor and enter data.  
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5. ENT – This key allows you to save data, accept values or execute  
menu commands. It is also used to create event marker icons.  
6. EXIT – The Exit key lets you return to the previous screen, clear  
data or close a menu.  
7. WPT – The Waypoint key is used to save and recall waypoints,  
search for waypoints and access the waypoint list. It's also involved in  
some navigation functions.  
8. ZOUT – This key lets you zoom the screen out. On the Sonar Page,  
this key returns you to a full sonar chart display, showing the entire  
water column from surface to bottom. On the Plotter Page, this lets you  
see a larger geographic area on the display. Less detail is seen as you  
zoom out.  
9. ZIN – This key lets you zoom the screen in. On the Sonar Page, this  
key enlarges fish signals and bottom detail. On the Plotter Page, zoom-  
ing in lets you see greater detail in a smaller geographic area on the  
display.  
Main Menu  
Access the Main Menu by pressing MENU|MENU. Select a menu item by  
using or to highlight the command and pressing ENT. To clear the  
Main Menu screen and return to the Page display, press EXIT.  
Main Menu Commands  
Screen:(CONTRAST, BRIGHTNESS and DISPLAY MODE):  
change the appearance of the display screen. Use  
these commands to adjust how the screen looks  
under various lighting conditions.  
Sounds: controls sound levels for keystrokes  
and alarms.  
Alarms: turns alarms on or off and changes  
alarm thresholds.  
NOTE:  
Route Planning, My Trails, GPS Setup and  
Trip Calculator will be addressed in the GPS  
section.  
Set Keel Offset: calibrates the unit to show depth under the keel or  
actual depth from the surface.  
Sonar Simulator: turns the unit's simulator feature on and off.  
System Setup: provides access to general configuration options, like  
Units of Measure, Reset Options, Pop-up Help, Set Language, etc.  
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Sun/Moon Calculations: displays the rising and setting time of the  
sun and moon.  
Timers: gives you access to the Up Timer, Down Timer and Clock  
Alarm Dialogs.  
Sonar Menu  
Access the Sonar Menu by pressing the MENU key one time. Select a  
menu item by using or to highlight the command and then pressing  
ENT. To clear the menu screen and return to the Page display, press  
EXIT.  
Sonar Menu Commands  
Sensitivity: allows you to set the degree of  
sensitivity used for display sonar echoes on the  
screen.  
Auto Sensitivity: automatically adjusts degree  
of sensitivity based on the depth of the water.  
GrayLine: separates fish and structure near  
the bottom from the actual bottom, and defines  
bottom composition/hardness.  
Depth Range: manually sets the depth range  
shown on the sonar chart.  
Auto Depth Range: automatically sets the  
depth range shown on the sonar chart to always keep the bottom in  
view.  
Upper and Lower Limits: sets the upper and lower depth limits of  
the sonar chart. Lets you zoom in on portion of the water column.  
Stop Chart: stops the sonar chart from scrolling. Used when you  
want to "freeze" the image for closer study.  
Chart Speed: sets the scrolling speed of the sonar chart.  
Depth Cursor: displays a cursor line on the sonar chart which allows  
you to accurately measure the depth of a sonar target.  
Overlay Data: allows you to select the types of information shown on  
the sonar chart screen.  
Sonar Features: launches the Sonar Features menu gives you ac-  
cess to features like, screen color mode, auto depth and sensitivity, sur-  
face clarity, noise rejection, Fish I.D.symbols, zoom and zone bars.  
Ping Speed: sets the rate sonar pings are transmitted.  
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Basic Sonar Quick Reference  
1. Mount the transducer and unit. Connect the unit to electric power  
and the transducer.  
2. Launch your boat.  
3. To turn on the unit, press and release PWR key.  
4. Head for your fishing grounds. Your unit automatically displays digi-  
tal depth and surface water temperature in the corner of the screen.  
The auto settings will track the bottom, displaying it in the lower por-  
tion of the screen. The full sonar chart will scroll from right to left,  
showing you what's under the boat as you cruise across the water.  
5. As you're watching the sonar returns, you can change the display by:  
Zoom in to enlarge the chart for more detail: press ZIN.  
Zoom out to return to full chart mode: press ZOUT.  
6. If necessary, adjust sensitivity to improve chart readability. Press  
MENU|ENT and the Sensitivity Menu will appear on the left of your  
screen. Use and to change the setting.  
Boosting sensitivity will show more information on your screen, which  
may cause clutter. Reducing sensitivity will filter out some informa-  
tion, but could omit important images. We recommend adjusting sensi-  
tivity until the background is lightly "peppered" — that is, scattered  
dots appear, but individual objects (like fish arches or bottom struc-  
ture) can be easily picked out of the background.  
7. Watch the display for the appearance of fish arches. When you see  
arches, you've found fish! Stop the boat and get your lure or bait into  
the water at the depth indicated on the sonar chart.  
8. Gauge the fish depth by visually comparing the fish arches with the  
depth scale on the right side of the screen, or get a more accurate  
measure with the Depth Cursor. Press MENU|to DEPTH CURSOR|ENT.  
Press (or ) to align the cursor line with the fish arch. The exact  
depth appears in a box at the right end of the cursor line. To clear the  
cursor, press EXIT.  
9. If you are drifting at a very low speed or anchored, you are not mov-  
ing fast enough for a fish to return the tell-tale fish arch signal. As you  
drift over a fish, or as a fish swims through the transducer's signal  
cone, the fish echo will appear as a straight line suspended between the  
surface and the bottom.  
10. To turn off the unit, press and hold PWR key for three seconds.  
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Surface signal  
Surface clutter  
Digital data  
overlay  
(depth &  
temperature)  
Depth scale  
In FasTrack, fish  
arches show as  
horizontal bars.  
Fish arches  
around  
school of  
bait fish  
Zoom bar  
Structure  
FasTrack  
bar graph  
Bottom signal  
Sonar Page, showing full sonar chart mode.  
Pages  
The M52 Pro has five major Sonar display op-  
tions. They are the Full Sonar Chart, Split Zoom  
Sonar Chart, Digital Data, Flasher and Pro Tips.  
You access the various display modes by pressing  
the PAGES key. Press to SONAR|or to desired  
page|ENT. Press EXIT to clear the Page menu.  
The Full Sonar Chart is the main Sonar display  
option. This is a "cross-section" view of the water  
column beneath the boat. The chart moves  
across the screen, displaying sonar signal echoes  
that represent fish, structure and the bottom.  
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Full sonar chart (left) and Split Zoom Chart (right).  
Digital Data page (left) with Flasher page (center) and Pro Tips page  
(right).  
Sonar Operations  
Sensitivity controls the unit's ability to pick up echoes. If you want to  
see more detail, try increasing the sensitivity. There are situations  
when too much clutter appears on the screen. Decreasing the sensitiv-  
ity can reduce the clutter and show the strongest fish echoes, if fish are  
present.  
You can change the sensitivity level whether you are in Auto Sensitiv-  
ity mode or Manual Sensitivity mode.  
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These figures show results of different sensitivity levels on the  
same location. Sensitivity set at 50 percent (left). Sensitivity set at 100  
percent (center). Sensitivity Control bar (right).  
To adjust sensitivity:  
1. Press MENU|ENT.  
2. The Sensitivity Control Bar appears. Press to decrease sensitivity;  
press to increase sensitivity. Press EXIT.  
NOTE:  
If you want to change the sensitivity in Manual Mode, first turn off  
Auto Sensitivity: from the Sonar Page, press MENU|to AUTO SENSI-  
TIVITY|ENT|to SENSITIVITY|ENT. Press or to pick a different sen-  
sitivity setting. When it's set at the desired level, press EXIT.  
Important Tip:  
It is possible to scramble the settings so the sonar picture disap-  
pears from your screen. If that happens, remember it is easy to  
switch back to full automatic operation by restoring factory default  
settings.  
To Restore Factory Settings  
1. Press MENU|MENU|to SYSTEM SETUP|ENT|to RESET OPTIONS|ENT.  
2. The unit asks if you want to reset all the options. Select YES and  
press ENT. All options are reset, and the unit reverts back to the origi-  
nal settings.  
Fish Symbols vs. Full Sonar Chart  
You may have noticed in the quick reference that we used fish arches  
in full sonar chart mode for our example, and not the popular Fish  
I.D.fish symbol feature.  
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Fish I.D. is an easier way for a sonar novice to recognize a fish signal  
return when he sees it. However, locating fish by symbol only has some  
limitations.  
Your sonar unit's microprocessor is remarkably powerful, but it can be  
fooled. Some of the echoes calculated to be fish could be tree limbs or  
turtles! To see what's under your boat in maximum detail, we recom-  
mend you turn off Fish I.D. and begin learning to interpret fish arches.  
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Section 4:  
Sonar Options & Other Features  
ASP(Advanced Signal Processing)  
The ASPfeature is a noise rejection system built into the sonar unit  
that constantly evaluates the effects of boat speed, water conditions  
and interference. This automatic feature gives you the best display pos-  
sible under most conditions.  
The ASP feature is an effective tool in combating undesired signals  
(noise) from sources like bilge pumps, engine ignition systems, air bub-  
bles passing over the face of the transducer and vibration from the en-  
gine(s). In all cases, noise can produce unwanted marks on the display.  
The ASP feature has four settings — Off, Low, Medium and High.  
At left, Sonar Menu with Sonar Features selected. In the Sonar Features  
menu, Noise Rejection is selected with ASP in the default low setting.  
To change the ASP level:  
1. From the Sonar Page, press MENU|to SONAR FEATURES|ENT.  
2. Press to NOISE REJECTION|ENT.  
3. Press or to select a setting, then press ENT.  
4. To return to the previous page, press EXIT|EXIT.  
Alarms  
This unit has three different types of sonar alarms: Fish Alarm, Zone  
Alarm and Depth Alarm.  
Depth Alarm  
The Depth Alarm has both a Shallow and Deep setting. The depth  
alarms sound a tone when the bottom signal is shallower than the shal-  
low alarm's setting or deeper than the deep alarm's setting. These  
alarms can be used at the same time or individually.  
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At left, Main Menu and Sonar Alarms command.  
At right, the Sonar Alarms menu.  
To adjust and turn on the shallow alarm:  
1. Press MENU|MENU|to SONAR ALARMS|ENT.  
2. Press to SHALLOW ALARM DEPTH|ENT.  
3. Press or until the depth is correct, then press ENT.  
4. Press to SHALLOW ALARM ENABLED|ENT|EXIT.  
5. To turn off the alarm, press MENU|MENU|to SONAR ALARMS|  
ENT|ENT|EXIT.  
To switch to a different depth setting, open the Sonar Alarms menu  
and repeat the instructions in step 3 above.  
To adjust and turn on the deep alarm:  
1. Press MENU|MENU|to SONAR ALARMS|ENT.  
2. Press to DEEP ALARM DEPTH|ENT.  
3. Press or until the depth is correct, then press ENT.  
4. Press to DEEP ALARM ENABLED|ENT|EXIT.  
5. To turn off the alarm, press MENU|MENU|to SONAR ALARMS|ENT|↓  
to DEEP ALARM ENABLED|ENT|EXIT.  
To switch to a different depth setting, open the Sonar Alarms menu  
and repeat the instructions in step 3 above.  
Zone Alarm  
The zone alarm is triggered when any echo passes inside the zone  
alarm bar, shown on the right side of the screen.  
To adjust and turn on the zone alarm:  
1. Press MENU|MENU|to ALARMS|ENT|to SONAR ALARMS|ENT.  
2. Press to ZONE ALARM ENABLED|to ADJUST ZONE|ENT.  
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At left, Sonar Alarms menu, with Adjust Zone command selected.  
At right, Adjust Zone Alarm selection box, with Upper Limit selected.  
3. To set the upper boundary for the Zone Alarm, use orto select  
UPPER. Press or to move the top of the bar to the desired depth.  
4. To set the lower boundary for the Zone Alarm, use orto select  
LOWER Press or to move the bottom of the bar to the desired depth.  
5. Press EXIT|to ZONE ALARM ENABLED|ENT|EXIT|EXIT|EXIT. Now, any  
echo — fish, bottom, structure — within the zone alarm's depth range  
will trigger the zone alarm.  
6. To turn off the alarm, press MENU|MENU|to ALARMS|ENT|to SO-  
NAR ALARMS|ENT|to ZONE ALARM ENABLED|ENT|EXIT|EXIT|EXIT.  
To switch to a different depth setting, open the Sonar Alarms menu  
and repeat the instructions in steps 3 and 4 above.  
Sonar Alarms menu with Fish Alarm selected. The check box  
to the left is checked, indicating the alarm is turned on.  
Fish Alarm  
With Fish I.D. turned on, the fish alarm will sound a tone when a fish  
symbol or other suspended objects appear on the display.  
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To turn on fish alarm:  
1. Press MENU|MENU|to SONAR ALARMS|ENT.  
2. Press to FISH ALARM|ENT|EXIT.  
3. To turn off the alarm, press MENU|MENU|to SONAR ALARMS|ENT|↓  
to FISH ALARM|ENT|EXIT.  
Chart Speed  
Chart Speed allows you to control the rate echoes scroll across the  
screen.  
At left, Sonar Page menu. At right, Chart Speed Control Bar.  
To change chart speed:  
1. From the Sonar Page, press MENU|to CHART SPEED|ENT.  
2. The Chart Speed Control Bar appears. Press to decrease chart  
speed; press to increase chart speed.  
3. When it's set at the desired level, press EXIT.  
Depth Cursor  
The depth cursor consists of a horizontal line with a digital depth box on  
the right side. The numbers inside the box show the depth of the cursor.  
The cursor can be moved to any location on the screen, letting you pin-  
point the depth of a target.  
1. From the Sonar Page, press MENU|to DEPTH CURSOR|ENT.  
2. The depth cursor appears. Press to lower the cursor line; press to  
raise the cursor line.  
3. To clear the depth cursor, press EXIT.  
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Cursor line  
Depth box  
At left, Depth Cursor selected. At right, sonar chart with the depth  
cursor active. The line indicates the large fish is 40.53 feet deep.  
Depth Range - Automatic  
When turned on for the first time, the bottom signal is automatically  
placed in the lower half of the screen. This is called Auto Ranging and  
is part of the automatic function.  
At left, Sonar Page menu with Depth Range command selected. At  
right, the Depth Range Control Scale.  
To select Automatic Depth Range:  
1. From the Sonar Page, press MENU|to DEPTH RANGE|ENT.  
2. The Depth Range Control Scale appears. Press or to select a dif-  
ferent depth range. A dark bar highlights the selected range. Range  
numbers in gray cannot be selected.  
3. When the new range is selected, press EXIT to clear the menu.  
Depth Range - Manual  
You have complete control over the range when the unit is in the man-  
ual mode. There are 12 depth ranges, from 5 feet to 800 feet.  
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To switch to Manual Depth Range:  
1. First, turn off automatic depth range. From the Sonar Page, press  
MENU|to AUTO DEPTH RANGE|ENT.  
2. Press to DEPTH RANGE|ENT.  
3. Press or to select a different depth range. A horizontal dark bar  
highlights the selected range.  
4. When the new range is selected, press EXIT to clear the menu.  
At left, Sonar Page Menu with Upper and Lower Limits command se-  
lected. At right, Sonar Chart Limits menu, with Upper Limit selected.  
Depth Range - Upper and Lower Limits  
Virtually any segment of the water column can be displayed by using  
the upper and lower limit feature. This lets you pick the shallow and  
deep depth range limits that are shown on the screen, provided there is  
at least 5 feet between the upper and lower limit you select.  
Area "zoomed"  
Normal display, in auto depth range mode, left. At right, display  
"zoomed" with Upper and Lower Limits focusing on the portion  
of the water column from 10 feet to 20 feet deep.  
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To change the upper and lower limits:  
1. From the Sonar Page, press MENU|to UPPER AND LOWER LIMITS|ENT.  
The Sonar Chart Limits menu appears, with Upper Limit selected.  
2. To set the upper limit, press ENT. Press or until the first digit is  
correct, then to move to the second digit. Repeat until the depth is  
correct, then press EXIT.  
3. To set the lower limit, press to LOWER LIMIT|ENT. Press or until  
the first digit is correct, then to move to the second digit. Repeat un-  
til the depth is correct and then press EXIT.  
To turn off upper and lower limits:  
1. From the Sonar Page, press MENU|to AUTO DEPTH RANGE|ENT|EXIT.  
Surface clutter  
Fish arches  
Structure  
In FasTrack, fish  
arches show as  
horizontal bars.  
Bottom signal  
GrayLine™  
FasTrack  
bar graph  
Sonar Page showing FasTrack.  
FasTrack  
This feature automatically converts all echoes to short horizontal lines  
on the display's far right side, giving you a rapid update of conditions  
directly under the boat.  
Fish I.D.(Fish Symbols & Depths)  
The Fish I.D. feature displays fish-like targets as fish symbols on the  
screen. When using Fish I.D. remember, there are instances where Fish  
I.D. can't distinguish between fish and other suspended objects such as  
trotlines, turtles, submerged floats, air bubbles, etc.  
To turn on Fish ID:  
1. From the Sonar Page, press MENU|to SONAR FEATURES|ENT.  
2. Press to FISH ID SYMBOLS|ENT|EXIT|EXIT. To turn off Fish I.D., re-  
peat these instructions.  
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Sonar Features menu with Fish I.D. Symbols selected.  
When the check box to the left is checked, the feature is on.  
FishTrack™  
FishTrack shows the depth of a fish symbol when it appears on the dis-  
play. This feature is available only when the Fish I.D. is turned on.  
To turn on FishTrack and Fish ID:  
1. From the Sonar Page, press MENU|to SONAR FEATURES|ENT.  
2. Press to FISH ID DEPTHS|ENT|EXIT|EXIT.  
To turn off FishTrack, repeat these instructions. Turning off FishTrack  
in this manner will not turn off Fish I.D. symbols.  
Symbols with  
FishTrack depths  
Sonar Features menu with Fish I.D. Depths selected. When the check  
box to the left is checked, the feature is on. At right, Sonar Page show-  
ing Fish I.D. symbols and FishTrack depths turned on.  
Grayline®  
Grayline helps you tell the difference between a hard and soft bottom.  
For A soft, muddy or weedy bottom returns a weaker signal shown by a  
narrow or no gray line. A hard bottom returns a strong signal which  
causes a wide gray line.  
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At left, Sonar Page menu with GrayLine command selected.  
At right, the GrayLine control bar.  
To adjust the Grayline level:  
1. From the Sonar Page, press MENU|to GRAYLINE|ENT.  
2. The Grayline Control Bar appears. Press to decrease Grayline;  
press to increase Grayline.  
3. When it's set at the desired level, press EXIT.  
Overlay Data command on the Sonar Menu, at left. Overlay Data  
Shown selection menu, right. In this example, we scrolled down the  
data list to highlight "Water Speed."  
Overlay Data  
Overlay data is digital data that may be overlaid on the screen.  
To change overlay data:  
1. Press MENU|to OVERLAY DATA|ENT.  
2. Press or to select Data Type|ENT. When selected, a check mark  
appears beside the data type.  
3. To return to the previous page, press EXIT|EXIT.  
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To turn off overlay data:  
1. Press MENU|to OVERLAY DATA|ENT.  
2. Press or to select Data Type, then press ENT until the check mark  
to the left of the selected data type disappears.  
3. To return to the previous page, press  
EXIT|EXIT.  
To change overlay data font size:  
1. Press MENU|to OVERLAY DATA|ENT.  
2. Press or to select Data Type. The DATA SIZE  
(displayed in the bottom of the Overlay Data  
Shown window) can be changed using or .  
Overlay  
Data  
When a desired size is achieved, press EXIT.  
3. To return to the previous page, press EXIT.  
Ping Speed & HyperScroll™  
Ping Speed controls the rate at which the transmitter and transducer  
broadcast sonar sound waves — pings — into the water. The unit has a  
default ping speed of 50 percent, which automatically provides enough  
return echoes to scroll the chart at normal boating speeds.  
However, when you are running at high speeds you may want to use  
the HyperScrollfeature. When you change the Ping Speed to any set-  
ting greater than 50 percent, the unit automatically enters HyperScroll  
mode.  
At left, Sonar Menu with Ping Speed command selected.  
Ping Speed Control Bar, right, at default setting.  
To change Ping Speed:  
1. From the Sonar Page, press MENU|to PING SPEED|ENT.  
2. The Ping Speed Control Bar appears. Press to increase ping speed;  
press to decrease ping speed. Press EXIT.  
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To adjust Sensitivity:  
1. From the Sonar Page, press MENU|ENT.  
2. The Sensitivity Control Bar appears. Press to decrease sensitivity;  
press to increase sensitivity. When it's set at the desired level, press  
EXIT. (When you reach the maximum or minimum limit, a tone sounds.)  
To turn off HyperScroll:  
1. From the Sonar Page, press MENU|to PING SPEED|ENT.  
2. The Ping Speed Control Bar appears. Press to decrease ping speed  
to 50 percent. When it's set at the desired level, press EXIT.  
When you enable HyperScroll, the width of the FasTrack bar graph  
display doubles in width at the right side of the screen, giving you a  
better view of Fastrack's instantaneous sonar returns.  
Reset Options  
This command is used to reset all features, options  
and settings to their original factory defaults. This  
is useful when you have changed several settings  
and want to return the unit to basic automatic op-  
eration.  
1. Press MENU|MENU|to SYSTEM SETUP|to RESET  
OPTIONS|ENT.  
2. Press or to YES|ENT.  
3. All features and options are returned to the factory default settings.  
Sensitivity & Auto Sensitivity  
The sensitivity controls the ability of the unit to pick up echoes. A low  
sensitivity level (from zero to 50 percent) excludes much of the bottom  
information, fish signals, and other target information. High sensitivity  
levels let you see this detail, but it can also clutter the screen with many  
undesired signals. Typically, the best sensitivity level shows a good solid  
bottom signal with Colorline and some surface clutter.  
Automatic Sensitivity  
This unit has two sensitivity modes: Automatic and Manual. In auto-  
matic you can adjust sensitivity up to 100 percent but the unit will  
limit your minimum setting.  
In manual mode, you have complete control over sensitivity, with the  
ability to set it anywhere from zero to 100 percent.  
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To adjust sensitivity in auto mode:  
1. From the Sonar Page, press MENU|to AUTO SENSITIVITY|ENT.  
2. Highlight SENSITIVITY and press ENT.  
2. The Sensitivity Control Bar appears. Press to decrease sensitivity;  
press to increase sensitivity. When it's set at the desired level, press  
EXIT.  
At left, Sonar Menu with Sensitivity command selected. At right, the  
Sensitivity Control Bar.  
To adjust sensitivity in manual mode:  
1. First, turn off Auto Sensitivity: from the Sonar Page, press MENU|↓  
to AUTO SENSITIVITY|ENT.  
2. Press to SENSITIVITY|ENT and the Sensitivity Control Bar appears.  
Press or to pick a different sensitivity setting. When it's set at the  
desired level, press EXIT.  
Keel and Waterline Offset  
Water depth is measured from the transducer to the bottom, which not  
only diminishes the accuracy of depth readings, but also could present  
a problem for vessels with a large keel. The Offset feature can correct  
both issues via Keel Offset and Waterline Offset.  
Keel Offset  
You can protect your boat’s keel from obstructions by changing unit  
settings to display water depth from the keel to the bottom instead of  
from the transducer to the bottom. Before setting keel offset, measure  
the distance from the transducer to the lowest part of the keel. If, for  
example, the keel is 3.5 feet below the transducer, it will be input as –3.5  
feet.  
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To set Keel Offset:  
1. Press MENU|MENU|to SET KEEL OFFSET|ENT.  
2. The Keel Offset dialog box appears. Press to so that the displayed  
number shows a minus (–) sign instead of the plus (+) sign.  
3. Press until the number shows – 3.5, then press EXIT. The depth  
indicators now accurately show the depth of water beneath the keel.  
Waterline Offset  
You can get a more precise measure of water depth by using waterline  
offset, which takes into account the distance from the transducer to the  
waterline when calculating depth.  
Before setting waterline offset, you must measure the distance from the  
transducer to the waterline on your boat. If, for example, the transducer  
is 1.5 feet below the waterline, it will be input as +1.5 feet.  
To set Waterline Offset:  
1. Press MENU|MENU|to SET KEEL OFFSET|ENT.  
2. The Keel Offset dialog box appears with a plus (+) sign at the front of  
the box.  
3. Press until the displayed number is + 1.5 and press EXIT. The  
depth indicators now accurately show the water depth from surface to  
bottom.  
Sonar Color Mode  
The default color scheme for the sonar chart is grayscale, but we offer  
other variations to suit your viewing preferences. You have the chart  
displayed in reverse grayscale, bottom black or FishReveal mode.  
To change the chart mode color scheme:  
1. From the Sonar Page, press MENU|to SONAR FEATURES|ENT.  
2. Press to SONAR CHART MODE|ENT.  
3. Press or to Mode Name|ENT.  
4. Press EXIT|EXIT to return to the Sonar Page.  
Sonar Chart Display Options  
The M52 Pro offers five Sonar chart display options. To choose among  
them, press EXIT to clear any menus, then press PAGES and use the ar-  
row keys to select the desired mode.  
Full Sonar Chart  
This is the default mode used when the Sonar is turned on for the first  
time or when it's reset to the factory defaults. The bottom signal scrolls  
across the screen from right to left. Depth scales on the right side of the  
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screen aid in determining the depth of targets. The line at the top of  
the screen represents the surface. The bottom depth and surface tem-  
perature (if the unit is equipped with a temperature sensor or a trans-  
ducer with a temp sensor built in) show at the top left corner of the  
screen. The FasTrack™ display shows just to the right of the scale.  
This changes all echoes into short horizontal bars, replicating a flasher  
sonar. The zoom bar on the far right shows the area that's zoomed  
when the zoom is in use. (See the Zoom section for more information.)  
Full Sonar Chart (left). Split Zoom Sonar Chart (right) with left win-  
dow zoomed to 4X.  
Split Zoom Sonar Chart  
A split chart shows the water column from the surface to the bottom in  
the right panel. The left panel shows an enlarged version of the right  
panel.  
Digital Data page (left). Flasher page (right).  
Digital Data/Chart  
This mode shows nine digital boxes or windows containing (by default):  
Water Depth; Water Temp; Speed; Distance to Destination; Bearing;  
Travel Time; Track; Off Course; and the unit's Voltage.  
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Flasher  
The Flasher page represents a flasher-style sonar. A circular dial  
shows all returning echoes at a high screen refresh rate. It uses the  
Grayline feature to show weaker targets as lighter colors. The bottom  
depth is also shown as a black bar across the outer circle.  
Pro Tips page (left). Pro Tips menu (center). Pro anglers list (right).  
Pro Tips  
The Pro Tips page gives you access to fishing tips from professional an-  
glers covering a variety of topics, including Structure/Location, Tem-  
perature, Depth, Lure, Color and Species.  
To access the pro tips menu:  
1. Press PAGES and select the SONAR Tab. Highlight PRO TIPS and press  
ENTER. A fishing tip will appear.  
2. Press MENU, which will launch the Pro Tips menu with the following  
seasonal categories: Pre-Spawn, Spawn, Post-Spawn, Summer and  
Fall.  
3. Use the up and down arrow keys to select the desired season. Press  
the right arrow key to access the professional angler list.  
4. Highlight a fisherman and press ENT. One of the selected fisherman's  
fishing tips will appear.  
5. Press EXIT repeatedly to return to the sonar chart display.  
Sonar Simulator  
The Sonar Simulator allows you to use the unit in simulator mode.  
To use the simulator:  
1. From the Sonar Page, press MENU|MENU|to SONAR SIMULATOR|ENT.  
2. Turn off Sonar Simulator by pressing MENU|MENU|to SONAR SIMU-  
LATOR|ENT|EXIT.  
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Stop Chart  
The Stop Chart feature allow you to stop the sonar chart from scrolling.  
To stop/start chart:  
1. Press MENU|to STOP CHART|ENT|EXIT. Repeat this step to restart  
the sonar chart.  
Surface Clarity  
Surface Clarity control reduces or eliminates surface  
clutter signals from the display.  
To adjust the Surface Clarity level:  
1. From the Sonar Page, press MENU|to SONAR FEA-  
TURES|ENT|ENT.  
2. Press or to select clarity level|EXIT|EXIT|EXIT.  
Zoom & Zoom Bar  
The Zoom feature allows you to zoom in the screen.  
To switch the zoom:  
1. Press ZIN to zoom in display 2X. Press ZIN again for a 4X zoom.  
2. Press ZOUT to reduce the zoom and show more of the chart.  
To turn on the Zoom Bar:  
1. Press MENU|to SONAR FEATURES|ENT.  
2. The Sonar Features menu appears. Press  
to ZOOM  
BAR|ENT|EXIT|EXIT. To turn off the Zoom Bar, repeat steps 1 and 2.  
Sonar Page zoomed 2X (left). Sonar Page zoomed 4X (right).  
Zoom Pan  
The Zoom Pan feature lets you move up and down water column when  
the 2X or 4X zoom is active.  
To use Zoom Pan:  
1. Switch to a manual Depth Range setting and turn on 2X or 4X Zoom.  
2. Press or to pan up and down the water column.  
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Section 5:  
Sonar Troubleshooting  
Unit won't turn on:  
1. Check the power cable's connection at the unit. Check the fuse. Also  
check the wiring.  
2. Make certain the power cable is wired properly. The red wire con-  
nects to the positive battery terminal, black to negative or ground.  
3. Make sure battery voltage is at least 11 volts.  
Unit operates only in demo mode:  
The transducer or antenna module has not yet been connected or has  
been disconnected.  
Unit freezes, locks up, or operates erratically:  
1. Electrical noise from the boat's motor, trolling motor, or an accessory  
may be interfering with the sonar unit. Rerouting the power and trans-  
ducer cables away from other electrical wiring on the boat may help.  
Route the sonar unit's power cable directly to the battery instead of  
through a fuse block or ignition switch  
2. Inspect the transducer cable for breaks, cuts, or pinched wires.  
3. Check both the transducer and power connectors. Make certain both  
are securely plugged in to the unit.  
Weak bottom echo, digital readings erratic, or no fish signals:  
1. Make certain the transducer is pointing straight down. Clean the  
face of the transducer. Oil, dirt and fuel can cause a film to form on the  
transducer, reducing its effectiveness. If the transducer is mounted in-  
side the hull, be sure it is shooting through only one layer of fiberglass  
and that it is securely bonded to the hull.  
2. Electrical noise from the boat's motor can interfere with the sonar,  
causing the noise rejection level to increase, eliminating weaker signals  
like fish or even structure.  
3. The water may be deeper than the sonar's ability to find the bottom.  
4. Check the battery voltage. If the voltage drops, the unit's transmitter  
power also drops, reducing its ability to find the bottom or targets.  
Bottom echo disappears at high speeds or erratic digital read-  
ing or weak bottom echo while boat is moving  
1. The transducer may be in turbulent water. It must be mounted in a  
smooth flow of water in order for the sonar to work at all boat speeds. Air  
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bubbles in the water disrupt the sonar signals, interfering with its ability  
to find the bottom or other targets. The technical term for this is cavita-  
tion.  
2. Electrical noise from the boat's motor can interfere with the sonar.  
Try using resistor spark plugs or routing the sonar unit's power and  
transducer cables away from other electrical wiring on the boat.  
No fish arches when the Fish I.D. feature is off:  
1. Make certain the transducer is pointing straight down. This is the  
most common problem if a partial arch is displayed.  
2. The sensitivity may not be high enough. In order for the unit to dis-  
play a fish arch, it has to be able to receive the fish's echo from the time  
it enters the cone until it leaves. If the sensitivity is not high enough,  
the unit shows the fish only when it is in the center of the cone.  
3. Use the Zoom feature. It is much easier to display fish arches when  
zoomed in on a small range of water than a large one.  
4. The boat must be moving at a slow trolling speed to see fish arches.  
If the boat is motionless, fish stay in the cone, showing on the screen as  
straight horizontal lines.  
NOISE  
Noise usually appears on the sonar's display as random patterns of dots  
or lines. In severe cases, it can completely cover the screen with black  
dots, or cause the unit to operate erratically, or not at all.  
To eliminate or minimize the effects of electrical noise, try to determine  
the cause. With the boat at rest in the water, turn all electrical equip-  
ment on the boat off. Make sure the engine is also off. Turn on your so-  
nar, then turn off Noise Reject {ASP feature (Advanced Signal Process-  
ing)]. Sensitivity should be set at 90-95 percent. There should be a  
steady bottom signal on the display. Now turn on each piece of electri-  
cal equipment on the boat and view the effect on the sonar's display. If  
you find noise interference from an electrical instrument, trolling motor,  
pump, or radio, try to isolate the problem. You can usually reroute the  
sonar unit's power cable and transducer cable away from the wiring that  
is causing the interference.  
If no noise displays on the sonar unit from electrical equipment, start  
the engine and increase the RPM with the gearshift in neutral. If noise  
appears on the display, the problem could be one of three things; spark  
plugs, alternator, or tachometer wiring. Try using resistor spark plugs,  
alternator filters, or routing the sonar unit's power cable away from  
engine wiring. When no noise appears on the sonar unit after all of the  
above tests, then the noise source is probably cavitation.  
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Section 6:  
Basic GPS Operations  
Main Menu  
You can access the Main Menu from any of the four Page screens by  
pressing MENU|MENU. To clear the menu screen and return to the page  
display, press EXIT.  
Main Menu.  
The Main Menu commands and their functions are:  
Screen: changes the contrast or brightness of the display screen.  
Sounds: enables or disables the sounds for key strokes and alarms and  
sets the alarm style.  
Alarms: turns GPS or sonar alarms on or off and changes alarm  
thresholds.  
Route Planning: used to plan, view or navigate a route.  
My Trails: shows, hides, creates and deletes plot trails. Also used to  
navigate or backtrack a trail.  
Cancel Navigation: turns off the various navigation commands. Used  
to stop navigating after you have reached your destination waypoint or  
plotter cursor location; or after you reach the end of a route or trail.  
GPS Setup: sets various GPS receiver options.  
System Setup: sets general configuration options.  
Sun/Moon Calculations: finds the rising and setting time of the sun  
and the moon.  
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Trip Calculator: shows trip status and statistics.  
Timers: controls the up timer, down timer and alarm clock settings.  
Browse MMC Files: this allows you to view the installed MMC card  
and the files it contains.  
Pages  
The unit has four GPS Page displays that represent the four major oper-  
ating modes. They are the Satellite Status Page, the Navigation Page,  
Plotter Page, Position Page and Pro Tips Page. They are accessed by  
pressing the PAGES key, then using or to select a Page. (Clear the  
Pages Menu by pressing EXIT.)  
Pages Menu, showing the GPS display options.  
Sonar Pages  
Like the GPS Pages, there are four Sonar Page displays. The heart of  
the Sonar Page is the sonar chart, a view of the water column from the  
surface to the bottom. The chart scrolls across the screen from right to  
left, displaying signal echoes that represent fish, structure and the bot-  
tom.  
To access Sonar Pages:  
1. Press PAGES|to SONAR|or to page|ENT. (Clear the Pages Menu  
by pressing EXIT.)  
Satellite Status Page  
The Satellite Status Page, shown, provides detailed information on the  
status of the unit's satellite lock-on and position acquisition.  
To access the Satellite Status Page:  
1. Press PAGES|to GPS|or to SATELLITES|ENT.  
WARNING:  
Do not begin navigating with this unit until the numbers  
have stopped flashing!  
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Satellite Page. Left view indicates unit has not locked on to any satel-  
lites and does not have a fix on its position. Center view shows satel-  
lites being scanned. Right view shows satellite lock-on with a 3D posi-  
tion acquired (latitude, longitude and altitude.)  
This screen shows a graphical view of the satellites that are in view. The  
point in the center of the chart is directly overhead. The small inner ring  
represents 45° above the horizon and the large ring represents the horizon.  
North is at the top of the screen. You can use this to see which satellites are  
obstructed by obstacles in your immediate area if the unit is facing north.  
The GPS receiver is tracking satellites that are in light blue. The re-  
ceiver hasn't locked onto a satellite if the number is dark blue, there-  
fore it isn't being used to solve the position. The "Estimated Position  
Error" (horizontal position error) shown in the upper left corner of the  
screen is the expected error from a benchmark location. In other words,  
if the EPE shows 50 feet, then the position shown by the unit is esti-  
mated to be within 50 feet of the actual location.  
The Satellite Status Page has its own menu, which is used for setting  
various options. To access the Satellite Status Page Menu, from the  
Status Page, press MENU.  
Navigation Page  
This screen has a compass rose that not only shows your direction of  
travel, but also the direction to a recalled waypoint.  
To access the Navigation Page:  
1. Press PAGES|to GPS|or to NAVIGATION|EXIT.  
The navigation screen looks like the one below when you're not navi-  
gating to a waypoint or following a route or trail. Your position is  
shown by an arrow in the center of the screen. Your trail history is de-  
picted by the line extending from the arrow. The arrow pointing down  
at the top of the compass rose indicates your current track.  
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Track or compass heading indicator, showing direction of travel  
Compass  
rose  
Present  
position  
arrow  
Trail line  
Navigation  
information  
displays  
Navigation Page, recording a trail, traveling east. Page looks like  
this when the unit is not navigating to a waypoint , following  
a route, or backtracking a trail.  
When navigating to a waypoint, the Navigation screen looks like the  
following figure. Your ground speed, track, distance and bearing to  
waypoint, and course are all shown digitally on this screen.  
NOTE:  
Remember, when the Speed, Track and Position information dis-  
plays are flashing, satellite lock has not been  
achieved and no position fix has been deter-  
mined. A question mark will also flash on the  
present position arrow in the center of the  
compass rose.  
The Off Course window shows the current cross  
track error, illustrated in the figure below. This  
shows the distance you are off-course to the side of  
the desired course line. The course line is an imagi-  
nary line drawn from your position when you  
started navigating to the destination waypoint.  
Navigation Page,  
The course line is shown on the Navigation Page  
backtracking a trail.  
screen (and the Plotter Page screen) as a dotted  
line. The cross track error range is shown on the compass rose as a  
wide, white, corridor enclosing the course line. The outer edges of this  
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white corridor represent lines that show the current cross track error  
range. The default for the cross track error range is 0.20 miles.  
In the example above, the driver is headed north (a 12º track) toward a  
waypoint 12º (bearing) away. The cross track error range (white corri-  
dor) is 0.20 miles either side of the course. The driver is headed toward  
a waypoint which is 0.22 miles away.  
The Navigation Page has its own menu, which is used for some ad-  
vanced functions and for setting various options. To access the Naviga-  
tion Page Menu from the Navigation Page, press MENU.  
Position Page  
This page provides detailed textual information  
on your present position and the status of your  
trip. For example, it can display information  
such as your current latitude, longitude, travel  
time to destination and more. To get to the Posi-  
tion Page: press PAGE repeatedly until the page  
you want appears.  
The Position Page can be fully customized. The  
lower window can display ten of 22 types of naviga-  
tion information. Some of the popular information  
displays include: Altitude, Speed, Closing Speed,  
Distance, Total Distance, Travel Time, Arrival  
Time, Total Travel, Track, Bearing and Off Course.  
Position Page  
The Position Page has its own menu, which is used for setting various  
options. To access the Position Page Menu, from the Position Page,  
press MENU.  
Plotter Page  
The Plotter Page screens show your course and track from a "bird's-eye"  
view. By default, this unit shows the plotter with north always at the top  
of the screen. If you're navigating to a waypoint, the plotter also shows  
your starting location, present position, course line and destination.  
Plotter Page is the default screen that appears when you turn on the  
unit. To get to the Plotter Page from another page: Press PAGES|to  
GPS|or to PLOTTER|EXIT. When the Plotter Page is displayed, a  
screen similar to the following figures appears.  
The arrow in the center of the screen is your present position. It points  
in the direction you're traveling. The flashing line extending from the  
back of the arrow is your plot trail, or path you've taken.  
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The plotter's zoom range is the distance across the screen. This number  
shows in the lower right corner of the screen. In the first example fig-  
ure below, the range is 4,000 miles from the left edge of the display to  
the right edge.  
The Zoom In and Zoom Out keys zoom the plotter to enlarge or reduce  
its coverage area and the amount of detail shown. There are 39 avail-  
able zoom ranges, from 0.02 miles to 4,000 miles.  
The Plotter Page has its own menu, which is used for several functions  
and for setting various options. To access the Plotter Page Menu, from  
the Plotter Page, press MENU.  
At left, Plotter Page zoomed to 30 miles (note the overlapping, unread-  
able waypoints) and right, zoomed to 15 miles (with waypoints visible).  
Viewing the Plotter: Zoom & Cursor Arrow Keys  
The plotter is presented from a bird's eye view perspective. The current  
zoom range shows in the lower right corner of the screen.  
1. Press the ZIN key (zoom in) to move in closer and see greater detail in a  
smaller geographic area.  
2. Press the ZOUT key (zoom out) to move farther away and see less de-  
tail, but a larger geographic area.  
When you are traveling, the plotter will automatically move as you  
move. This keeps your current location roughly centered on the screen.  
You can manually pan or scroll the plotter northward, southward,  
eastward or westward by using the arrow keys, which launch the cross-  
hair cursor. This allows you to look at places on the plotter other than  
your current position. To clear the cursor, press EXIT, which jumps the  
display back to the current position or the last known position.  
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Selecting Any Plotter Item With the Cursor  
1. Use the zoom keys and the arrow keys to move around the plotter  
and find the item you wish to select.  
2. Use the arrow keys and center the cursor cross-hair on the desired ob-  
ject. On most items, a pop-up box will give the name of the selected item.  
Navigate to Cursor Position on Plotter  
The GO TO CURSOR command navigates to the current cursor position on  
the plotter. It's a quick and handy way to navigate to anything you can  
see on the plotter display.  
1. Use the cursor (controlled by the arrow keys) with the zoom in and  
zoom out keys to maneuver around the plotter until you find a location  
you want to go to.  
2. Center the cursor over the location to select it. See the example in  
the following figure.  
3. Press MENU|ENT and the M52 Pro will begin navigating to the cursor  
location.  
The Plotter Page will display a dotted line from your current position to  
the cursor position. The Navigation Page displays a compass rose showing  
navigation information to your destination. See the following examples.  
The Plotter Page at left clearly shows the course line connecting your  
current position to your destination. The Navigation Page, right, will also  
show navigation information.  
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GPS Quick Reference  
Start outdoors, with a clear view of the open sky. As you practice, try navi-  
gating to a location at least a few blocks away. While you're learning,  
navigation in too small an area will constantly trigger arrival alarms.  
1. Connect the unit to electric power and the antenna module. Make sure  
the MMC is in. (See complete installation details beginning on page 9.)  
2. To turn on the M52 Pro, press and release PWR key.  
3. Opening screen displays the GPS plotter at the 4,000 mile zoom  
range. Rotate through the four main GPS Page screens (Plotter, Satel-  
lite Status, Navigation and Position Page) by pressing PAGES|or to  
select Page Name|EXIT. Switch Pages to display Satellite Status Page.  
4. Wait while unit locates satellites and calculates current position. Process  
is visible on Satellite Page. This takes an average of 1 minute or less under  
clear sky conditions (unobstructed by terrain or structures). When the unit  
acquires position, a tone sounds and a position acquired message appears.  
5. With position acquired, press PAGES key to display Plotter Page, which  
shows your position in the center. You can move around the plotter by:  
Zoom in closer to see greater detail: press ZIN (zoom in key.)  
Zoom out to see more area, less detail: press ZOUT (zoom out key.)  
Scroll display north, south, east or west using arrow keys ↑ ↓ → ←.  
To stop scrolling and return to current position, press EXIT key.  
6. Set a waypoint (Wpt 001) at your current position so you can navi-  
gate back here: press WPT|WPT. Waypoint symbol and "001" appears.  
7. If you've already made some waypoints or event marker icons,  
zoom/scroll to find a nearby location to go to. Otherwise, travel around  
some and place some waypoint at place of interest. When you have sev-  
eral in place, use arrow keys to center cursor cross-hair over one of your  
existing waypoint or locations.  
8. Navigate to destination: press MENU|ENT|EXIT. Follow dotted course  
line on Plotter Page or compass bearing arrow on Navigation Page.  
9. At destination, Arrival Alarm goes off; to clear it, press EXIT. Cancel  
navigation: press MENU|MENU|to CANCEL NAVIGATION|ENT|to YES|ENT.  
10. Return to Wpt 1 by Backtrack Trail. Press MENU|MENU|to MY  
TRAILS|ENT. Press to Trail 1|ENT|to NAVIGATE|ENT|to RE-  
VERSE|ENT|to NAVIGATE|ENT. (If arrival alarm sounds, press EXIT.) Fol-  
low navigation displays.  
11. Back home, Arrival Alarm goes off; press EXIT. Cancel navigation:  
press MENU|MENU|to CANCEL NAVIGATION|ENT|to YES|ENT.  
12. To turn off the unit, press and hold PWR key for three seconds.  
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Find Distance between Points  
1. While on the Plotter Page press: MENU|to FIND DISTANCE|ENT.  
2. Center your cursor over the position you want to find the distance to.  
A rubber band line appears, connecting your current position to the  
cursor's location. The distance along that line will appear in the infor-  
mation box at the bottom of the screen.  
3. Press EXIT to return to regular operation.  
Cancel Navigation  
You can turn off any of the navigation commands after you reach your  
destination or at any other time by using the Cancel Navigation com-  
mand.  
To cancel navigation:  
Press MENU|MENU|to CANCEL NAVIGATION|ENT|to YES|ENT.  
At left, the distance from the boat's current position to  
nearest waypoint is 3.20 miles. At right. the distance from  
waypoint 003 to waypoint 009 is 7.94 miles.  
Waypoints  
A waypoint is simply an electronic address based on the latitude and  
longitude.  
Create a Waypoint  
You can create a waypoint at the cursor position or at your current posi-  
tion while navigating. You also can create a waypoint by manually enter-  
ing the position's latitude and longitude.  
NOTE:  
To create and save a Waypoint, these first two techniques use the  
Quick Save method, the fastest and easiest way to create a waypoint.  
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Create Waypoint at Current Position  
While you are traveling, press WPT|WPT. The waypoint is saved and  
automatically given a name with a sequential number, such as "way-  
point 003." The waypoint symbol and number appear on the plotter.  
Sequence for setting a waypoint. Step 1: while traveling, quickly press  
WPT twice to call up Find Waypoint screen (shown at left) and set a  
point. Step 2: a message says the waypoint has been saved (shown cen-  
ter). Step 3: vehicle continues on its way; number waypoint symbol is  
visible on plotter (shown at right).  
Create Waypoint on Plotter  
1. Use the arrow keys to move the cursor to the place where you want  
to make a waypoint.  
2. Press WPT|WPT. The waypoint is saved and automatically given a  
name with a sequential number, such as "waypoint 001." The waypoint  
symbol and number appear on the plotter.  
Create Waypoint by Entering a Position  
1. Press WPT|to CREATE NEW|ENT.  
2. Press to ENTERED POSITION|ENT|ENT.  
3. Press to LATITUDE|ENT. Enter the latitude by pressing or to  
change the first character, then press to the next character and re-  
peat until the latitude is correct. Press ENT.  
4. Press to LONGITUDE|ENT. Enter the longitude by pressing or to  
change the first character, then press to the next character and repeat  
until the longitude is correct. Press ENT|EXIT|EXIT. The waypoint symbol  
and number appear on the plotter and in the waypoint list.  
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Create Waypoint by Average Position  
This feature sets a waypoint at the current position after averaging  
several position readings.  
1. Press WPT|to CREATE NEW|ENT.  
2. Press or to AVERAGE POSITION|ENT|ENT.  
3. Wait while the unit takes points to average for the position. (The  
greater the number of points, the greater the accuracy.) When the desired  
number of points accumulates, press ENT to create and save the waypoint.  
4. The Edit Waypoint menu appears. You can simply save the waypoint  
by pressing EXIT|EXIT or you can edit the waypoint.  
Create Waypoint by by Projecting a Position  
This feature sets a waypoint at a point located a specific distance and  
bearing from a reference position. The reference position must be se-  
lected from your waypoint list.  
1. Press WPT|to CREATE NEW|ENT.  
2. Press to PROJECTED POSITION|ENT|ENT.  
3. Press to SET REFERENCE|ENT. Use and to select a waypoint.  
When the point has been selected, press ENT and the point's position  
appears as the reference position.  
4. Press to DISTANCE|ENT. Press or to change the first character,  
then press to the next character and repeat until the distance is cor-  
rect. Press ENT.  
5. Press to BEARING|ENT. Press or to change the first character,  
then press to the next character and repeat until the bearing is cor-  
rect. Press ENT.  
6. Press to PROJECT|ENT. The Edit Waypoint menu appears. You can  
simply save the new projected waypoint by pressing EXIT|EXIT or you  
can edit the waypoint. (Press EXIT|ENT if you want to immediately be-  
gin navigating to the new waypoint.)  
Delete a Waypoint  
To delete a waypoint from the waypoint list: press WPT|ENT|to way-  
point name|ENT|to DELETE|ENT|to YES|ENT. To return to the pre-  
vious page, press EXIT|EXIT.  
To delete a waypoint from the plotter:  
1. Use the arrow keys to select the waypoint with the cursor.  
2. Press WPT|to DELETE|ENT|to YES|ENT. To return to the previ-  
ous page and clear the cursor, press EXIT.  
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To delete all waypoints at one time:  
1. Press MENU|MENU|to SYSTEM SETUP|ENT|to DELETE ALL MY WAY-  
POINTS|ENT|to YES|ENT.  
2. To return to the previous page, press EXIT|EXIT.  
Edit a Waypoint  
Edit Waypoint Name  
1. Press WPT|ENT|to waypoint name|ENT|to EDIT NAME|ENT.  
2. Press or to change the first character, then press to the next  
character and repeat until the name is correct. Press ENT then  
EXIT|EXIT to return to the previous page display.  
Edit Waypoint Symbol  
1. Press WPT|ENT|to waypoint name|ENT|to EDIT SYMBOL|ENT.  
2. Use arrow keys to select desired symbol and press ENT. To return to  
the previous page, press EXIT|EXIT.  
Edit Waypoint Position  
1. Press WPT|ENT|to waypoint name|ENT|to EDIT POSITION|ENT.  
2. Latitude: press to LATITUDE|ENT. Press or to change the first  
character, then press to the next character and repeat until the lati-  
tude is correct. Press EXIT.  
3. Longitude: press to LONGITUDE|ENT. Press or to change the first  
character, then press to the next character and repeat until the lon-  
gitude is correct. Press EXIT.  
4. When latitude and longitude are correct, return to the previous page:  
press EXIT|EXIT|EXIT.  
Select a Waypoint  
To select a waypoint on the plotter use the arrow keys and center the  
cursor crosshairs over the waypoint.  
Find a Waypoint  
To access a waypoint stored in your unit's memory, press the WPT key.  
You'll see the Waypoint Menu, which offers these commands: FIND BY  
NEAREST, FIND BY NAME, and CREATE NEW.  
1. Press WPT. To look up the nearest waypoint, just press ENT, then  
scroll down the list to find the desired waypoint; or, to look by name,  
press to FIND BY NAME|ENT. For this example, use FIND BY NAME.  
2. If your waypoint list is a long one, you can spell out the waypoint  
name in the FIND BY NAME box to search for it. (Press or to change the  
first character, then press to move the cursor to the next character  
and repeat until the name is correct. Press ENT to jump to the list.)  
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3. If the list is short, you can jump directly to the FIND IN LIST box by  
pressing ENT. Use or to select the waypoint name, press ENT and  
the waypoint information screen appears with the GO TO command se-  
lected.  
Waypoint information screen on waypoint 004. Screen shows name, lati-  
tude/longitude, distance to waypoint and its compass bearing. Figure at  
left shows Go To command; right figure shows Find On Plotter command.  
4. You can use or to select various options on  
the waypoint information screen. If you wanted to  
navigate there, just press ENT, since the GO TO  
command is highlighted. If you want to see it on  
the plotter, press to FIND ON PLOTTER|ENT.  
5. The M52's plotter appears, with the cross-hair  
cursor highlighting the waypoint's symbol. A  
pop-up name box identifies the waypoint, as well  
as its distance and bearing. A data box at the  
bottom of the screen continues to display the  
location's latitude and longitude.  
Plotter screen  
showing Find  
Waypoint.  
7. To clear the search and return to the last page  
displayed, press EXIT|EXIT.  
Navigate To a Waypoint  
You can select any waypoint visible on the Plotter Page with the cur-  
sor, and then use the Navigate to Cursor command. Or, you could avoid  
scrolling the plotter to pick your waypoint if you use the Find Waypoint  
commands:  
1. Press WPT. To look up the nearest waypoint, just press ENT; or, to  
look by name (and scroll through the entire waypoint list), press to  
FIND BY NAME|ENT. For this example, look by name.  
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2. If your waypoint list is a long one, you can spell out the waypoint  
name in the FIND BY NAME box to search for it. (Press or to change the  
first character, then press to move the cursor to the next character  
and repeat until the name is correct, then press ENT to jump to the list  
below.)  
3. If the list is short, you can jump directly to the FIND IN LIST box by  
pressing ENT. Use or to select the waypoint name, press ENT and  
the waypoint information screen appears with the GO TO command se-  
lected.  
4. To begin navigating to the waypoint, press ENT.  
Course line  
(dotted)  
Trail line  
(flashing)  
Off course  
range, set at  
0.20 mile  
Navigation Page, navigating toward a waypoint and leaving a trail.  
Set Man Overboard (MOB) Waypoint  
This unit has a man overboard feature that shows navigation data to  
the location where the feature was activated. To activate it, press the  
ZOUT and ZIN keys at the same time. Your position at the time these  
keys are pressed is used as the man overboard position.  
Caution:  
Saving a new "Man Overboard" waypoint will overwrite and  
erase the previous "Man Overboard" waypoint.  
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Navigate Back to MOB Waypoint  
Find your way back to the accident position with the Navigation Page  
or Plotter Page. When MOB is activated, the Navigation Page auto-  
matically shows the compass rose with its bearing arrow pointing to-  
ward the man overboard position.  
Navigating to Man Overboard: Navigation Page, left and center, and  
Plotter Page, right. The victim is astern of the vessel; the GPS shows  
which direction to steer to for the rescue.  
The man overboard position is stored in the waypoint list for future  
reference. It can be edited the same as any other waypoint.  
Trails  
A trail, or plot trail, is a string of position points that record the path  
you have taken.  
Creating and Saving a Trail  
The M52 Pro is set at the factory to automatically create and record a  
trail while the unit is turned on. The unit will continue recording the  
trail until the length reaches the maximum trail point setting (default is  
2,000, but the unit can record trails 9,999 points long). When the point  
limit is reached, the M52 Pro begins recording the trail over itself.  
With the default auto setting, the M52 Pro creates a trail by placing a dot  
(trail point) on the screen every time you change directions.  
To preserve a trail from point A to point B, you must "turn off" the trail  
by making it inactive before heading to point C or even back to point A.  
When the current trail is set inactive, the M52 Pro automatically be-  
gins recording a new trail.  
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Visible  
symbol  
Active  
symbol  
Sequence for saving a trail and beginning a new one. At left, My Trails  
command. Center, the Trails Menu. The arrow to the right of Trail 3  
indicates the trail is "active," and the check to the left indicates the  
trail is visible on the plotter display. The right figure shows the Edit  
Trail menu, with the Active command selected.  
New trail, named "Trail 3," is created when Trail 2 is made inactive.  
Any new travel will be recorded in this trail, which is active and visi-  
ble. Trails do not need to be visible in order to be active.  
To save a Trail:  
1. Press MENU|MENU|to MY TRAILS|ENT.  
2. Press to the Active Trail Name|ENT.  
3. Press to ACTIVE|ENT. This unchecks the Active option.  
4. To return to the previous page, press EXIT repeatedly.  
You can save and recall up to 10 different plot trails.  
Tip:  
Another quick way to stop recording one trail and begin a new one  
is to use the New Trail command: Press MENU|MENU|to MY  
TRAILS|ENT|ENT.  
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Delete a Trail  
This is the command used to erase or delete a trail.  
1. Press MENU|MENU|to MY TRAILS|ENT|to trail name|ENT.  
2. Press to DELETE TRAIL|ENT|to YES|ENT.  
Tip:  
You can also delete all trails at once.  
1. Press MENU|MENU|to MY TRAILS|ENT.  
2. Press to DELETE ALL|ENT|to YES|ENT.  
Display a Saved Trail  
The active trail is automatically visible on the plotter display with the  
factory default settings. You can selectively turn the trail display off  
and on for any saved or active trail.  
To turn off trail display:  
1. Press MENU|MENU|to MY TRAILS|ENT.  
2. Press |to enter the Saved Trail list, then use or to select the  
desired Trail Name|ENT.  
3. Press to ACTIVE|to VISIBLE|ENT. To return to the previous page,  
press EXIT repeatedly.  
To turn on trail display:  
1. Press MENU|MENU|to MY TRAILS|ENT.  
2. Press |to enter the Saved Trail list, then use or to select the  
desired Trail Name|ENT.  
3. Press to ACTIVE|to VISIBLE|ENT. To return to the previous page,  
press EXIT repeatedly.  
Edit a Trail Name  
1. Press MENU|MENU|to MY TRAILS|ENT|to trail name|ENT|ENT.  
2. Press or to change the first character, then press to the next  
character and repeat until the name is correct. Press ENT. Press EXIT  
repeatedly to return to the main display.  
Tip:  
You can quickly call up the Edit Trail menu by selecting a trail on  
the plotter with the cursor. Simply move the cursor over a trail and  
a pop-up box appears. Press WPT and the Edit Trail menu opens.  
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At left, trail selected with plotter cursor. The info box at the bottom of  
the screen shows distance and bearing from current position to the  
selected point on the trail. At right, the Edit Trail menu.  
Navigate a Trail  
There are three methods for following a trail: visual trailing, navigat-  
ing a trail (forward) and backtracking a trail (backward). Visual trail-  
ing is the simplest method. It uses only the Plotter Page and requires  
no menu commands at all. The technique works the same if you are  
running a trail forward or backward.  
Visual Trailing  
1. On the Plotter Page, zoom (ZIN or ZOUT) so your flashing trail is visi-  
ble.  
2. Begin moving and watch the Plotter Page. Simply walk or steer so  
that your current position arrow traces along the trail you have just  
made.  
Tip:  
Generally, when using this method, the smaller the zoom range,  
the more accurately you will be able to steer along the trail.  
Navigate a Trail (forward)  
The following figures illustrate the menu sequence for navigating a  
trail.  
1. Press MENU|MENU|to MY TRAILS|ENT.  
2. Press to enter the Saved Trail list, then use or to select the de-  
sired Trail Name|ENT.  
3. Press to DELETE TRAIL|to NAVIGATE|ENT.  
4. Press to NAVIGATE|ENT. The unit begins showing navigation infor-  
mation along the trail.  
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NOTE:  
If you are already located at or near the beginning of your trail, the  
arrival alarm will go off as soon as you press Enter. Just press EXIT  
to clear the alarm and proceed.  
5. When you reach your destination, cancel navigation.  
Figure 1  
Figure 2  
Figure 3  
Figure 4  
Navigate a trail menu sequence: Fig. 1, My Trails command. Fig. 2,  
Trails Menu. Fig. 3, Edit Trail Menu. Fig. 4, Edit Route Menu with  
Navigate command highlighted for Trail 1. A trail is always converted  
to a "route" when you navigate the trail.  
On the Plotter Page, the trail you are navigating is represented by a  
flashing line. The Navigation Page will also show the navigated trail as  
a flashing line. The bearing arrow on the compass rose points to the  
next waypoint on the trail.  
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Trail point  
Present  
position  
arrow  
Navigate trail, plotter views: at left boater is heading straight toward  
trail point 3. Center, when the point is reached, Arrival Alarm goes off  
and the steering arrow points toward next trail point. At right, boater  
has reached point 3 and has turned northeast to follow trail to point 4.  
(Flashing trail line is turned off for clarity.  
Navigate trail, navigation page (compass rose) views: at left, boater is  
northbound heading straight toward trail point 3; bearing arrow  
shows the trail point straight ahead. At right, driver has reached trail  
point 3 and must turn northeast to follow the trail. Arrival alarm goes  
off and bearing arrow swings around to say turn right (northeast), to-  
ward the next waypoint, trail point 4. The M52 Pro now shows naviga-  
tion information to point 4, which is 0.43 miles away.  
Navigate a Back Trail  
1. Press MENU|MENU|to MY TRAILS|ENT.  
2. Press |to enter the Saved Trail list, then use or to select the  
desired Trail Name|ENT.  
3. Press to DELETE TRAIL|to NAVIGATE|ENT.  
4. Press to NAVIGATE|to REVERSE|ENT|to NAVIGATE|ENT. The unit  
begins showing navigation information along the trail, in reverse.  
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Icons  
Icons are graphic symbols used to mark some location, personal point of  
interest or event. They can be placed on the plotter screen, saved and  
recalled later for navigation purposes. These are  
sometimes referred to as event marker icons. The  
M52 Pro has 42 different symbols you can pick from  
when creating an icon.  
Create Icon on Plotter  
1. Use the arrow keys to move the cursor to the  
place where you want to place an icon.  
2. Press ENT and the screen shows a "Select Icon  
Symbol" menu.  
3. Select the desired symbol for the icon and press ENT. The icon ap-  
pears on the plotter.  
Create Icon at Current Position  
1. While you are traveling, press ENT and the screen shows a "Select  
Icon Symbol" menu.  
2. Select the desired symbol for the icon and press ENT.  
Delete an Icon  
You can delete all the icons at one time, you can delete all icons repre-  
sented by a particular symbol, or you can use the cursor to delete a se-  
lected icon from the plotter.  
Delete icons menu.  
To Delete All Icons:  
1. Press MENU|to DELETE MY ICONS|ENT.  
2. Press to DELETE ALL ICONS and press ENT.  
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3. The Delete All Icons command will ask if you are sure. Press to  
YES|ENT. All icons will be deleted from the plotter.  
To Delete By Symbol:  
1. Press MENU|to DELETE MY ICONS|ENT.  
2. Press to DELETE BY SYMBOL and press ENT.  
3. The Delete by Symbol command will launch the Select Symbol menu.  
Select the icon symbol to delete and press ENT. A message appears say-  
ing all icons with the selected symbol have been deleted.  
To Delete from Plotter:  
1. Press MENU|to DELETE MY ICONS|ENT.  
2. Press to DELETE ALL ICONS, DELETE BY SYMBOL, or DELETE FROM PLOTTER  
and press ENT.  
3. The Delete From Plotter command will prompt you to move the cur-  
sor over an icon to select it. After selecting the icon, press ENT and it  
will be removed from the plotter.  
Navigate to an Icon  
1. Use arrow keys to center cursor cross-hairs over the icon.  
2. To navigate to the selected icon location: press MENU|ENT|EXIT. Fol-  
low course line on the Plotter Page or the compass bearing arrow on the  
Navigation Page.  
Routes  
A route is a series of waypoints, linked together in an ordered sequence  
used to mark a course of travel. The course from one waypoint to the  
next is a leg; routes are composed of one or more legs.  
Create and Save a Route  
You can create a route by selecting existing waypoints from the way-  
point list or you can set a series of route waypoints on the plotter with  
cursor arrows and the Enter key.  
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Route Planning command on Main Menu, left,  
will open the Route List screen, right.  
1. From the NAVIGATION PAGE, press MENU|ENT or from the PLOTTER PAGE,  
press MENU|MENU|to ROUTE PLANNING|ENT.  
2. Press |or to route name|ENT|to (ROUTE END)|ENT|to ADD  
FROM PLOTTER|ENT. The Plotter Page appears with the cursor showing.  
Edit Route menu, left. Edit Route Waypoints menu, right,  
with Add From Plotter command selected.  
3. Use the arrow keys to center the cursor on the waypoint or event  
marker icon located at the start of your route.  
4. Set the first route waypoint and press ENT. In this example, we are  
adding fishing spots to a route so we can visit each one in order. We  
started with waypoint 1 and moved along them in order.  
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Route creation sequence: At left, the Plotter Page shows the waypoints  
we want to visit in our route. Set the first route point at waypoint  
(001). Center, move cursor to the next waypoint in the route and press  
Enter. Waypoint added message appears. Right, continue adding way-  
points until you reach the end of the route.  
5. Move the cursor to the next point in the route and press ENT to set  
the next waypoint.  
6. Repeat step five until the route reaches your destination.  
7. To save your route, press EXIT. The M52 Pro reverts to the Edit  
Route screen, with the route automatically named "Route 1" and stored  
in the M52's internal memory. To return to the main display press EXIT  
repeatedly.  
Delete a Route  
1. From the NAVIGATION PAGE, press MENU|ENT or from the PLOTTER PAGE  
press MENU|MENU|to ROUTE PLANNING|ENT.  
2. Press to route name|ENT.  
3. Press to NAVIGATE|ENT|to DELETE|ENT|to YES|ENT.  
Tip:  
You can also delete all routes at once.  
1. From the NAVIGATION PAGE, press MENU|ENT or from the PLOTTER  
PAGE press MENU|MENU|to ROUTE PLANNING|ENT.  
2. Press to DELETE ALL|ENT|to YES|ENT.  
Edit a Route Name  
1. From the NAVIGATION PAGE, press MENU|ENT or from the PLOTTER PAGE  
press MENU|MENU|to ROUTE PLANNING|ENT.  
2. Press to route name|ENT|ENT.  
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3. Press or to change the first character, then press to move the  
cursor to the next character and repeat until the name is correct, then  
press ENT. Return to the main display by pressing EXIT repeatedly.  
You also can edit the route by adding and  
removing waypoints.  
1. From the NAVIGATION PAGE, press MENU|ENT  
or from the PLOTTER PAGE press MENU|MENU|↓  
to ROUTE PLANNING|ENT.  
2. Press to route name|ENT|to ROUTE  
WAYPOINTS LIST. Use and to select a way-  
point, then press ENT.  
3. Use and to select a command from the  
Edit Route Waypoints menu and press ENT.  
Add From Plotter lets you insert a waypoint in the route by clicking on  
a plotter location with the cursor. Add Waypoint calls up the Waypoint  
List so you can insert a waypoint from the list. Remove Waypoint will  
delete the waypoint from the route. View Waypoint will show you  
where the selected waypoint is on the plotter.  
Navigate a Route  
1. From the NAVIGATION PAGE, press MENU|ENT or from the PLOTTER PAGE,  
press MENU|MENU|to ROUTE PLANNING|ENT.  
Route Planning command on Main Menu, left; Routes menu, center;  
Edit Route menu, right. Navigate command is selected.  
2. Press to select route name|ENT|to NAVIGATE|ENT|ENT.  
3. Upon arrival at your destination, cancel navigation:  
press MENU|MENU|to CANCEL NAVIGATION|ENT|to YES|ENT.  
The following figures show what the Navigation Page and Plotter Page  
look like while navigating a route.  
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Navigate a Route backward  
Here's how you run a route backward, from the end waypoint to the  
beginning waypoint:  
1. From the NAVIGATION PAGE, press MENU|ENT or from the PLOTTER PAGE,  
press MENU|MENU|to ROUTE PLANNING|ENT.  
2. Press to select route name|ENT|to NAVIGATE|to RE-  
VERSE|ENT|to NAVIGATE|ENT.  
3. Upon arrival at your destination, cancel navigation:  
press MENU|MENU|to CANCEL NAVIGATION|ENT|to YES|ENT.  
Figure 3.  
Figure 2.  
Figure 1.  
Figure 4.  
Figure 5.  
Figure 6.  
Navigating along a route: Figs. 1 & 4 show the Plotter Page (top) and  
Navigation Page (bottom) while running a route. Boater is heading  
straight for waypoint 3. In Figs. 2 & 5, the traveler has arrived at Wpt  
3; the arrival alarm has been triggered and the bearing arrow on the  
compass rose has turned to point toward Wpt 4, off to the northeast. In  
Figs. 3 & 6 the traveler has turned northeast on his new course and is  
heading straight for Wpt 4, which is 0.43 miles away.  
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Utilities  
Utilities are useful tools for traveling or for outdoor activities.  
Alarm Clock  
To get to the alarm clock menu: press MENU|MENU|to TIMERS|ENT|↓  
to ALARM CLOCK|ENT.  
Sun/Moon Rise & Set Calculator  
To get to the Sun/Moon menu: press MENU|MENU|to SUN/MOON CALCU-  
LATIONS|ENT.  
Trip Calculator  
To get to the Calculator menu: press MENU|MENU|to TRIP CALCULA-  
TOR|ENT.  
Trip Down Timer  
To get to the Down Timer menu: press MENU|MENU|to TIMERS|ENT|↓  
to DOWN TIMER|ENT.  
Trip Up Timer  
To get to the Up Timer menu: press MENU|MENU|to TIMERS|ENT|ENT.  
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Notes  
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Section 7:  
System & GPS Setup Options  
Alarms  
You unit has three alarms: Arrival Alarm, Off Course Alarm and An-  
chor Alarm. You can turn the alarms off and on and change their dis-  
tance settings.  
You can set an arrival alarm to flash a warning message and sound a  
tone when you cross a preset distance from a waypoint. If, for example,  
you have the arrival alarm set to 0.1 mile, then the alarm will flash a  
message when you come within 0.1 mile of the recalled waypoint.  
The off course alarm warns you when your track drifts too far to the  
right or left of the course line to the waypoint. If, for example, the  
alarm is set to 0.1 mile, then the alarm flashes a message if you drift  
0.1 of a mile or more to the right or left of the line to the waypoint.  
The anchor alarm is triggered when you drift outside of a preset radius.  
If, for example, you are anchored and your boat moves more than 0.1  
mile, the alarm will flash a message and sound a tone.  
Alarms command, left; Alarm menu, right.  
To change alarm settings:  
1. Press menu|MENU|to ALARMS|ENT|ENT.  
2. Scroll or to select the desired category, then press ENT to check or  
clear the Enabled box. This turns the alarm on (checked) or off (un-  
checked.)  
3. To change distance settings, scroll or to select the desired cate-  
gory, then press |ENT to activate the distance dialog box. Press or ↓  
to change the first character, then press to the next character and  
repeat until the name is correct.  
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4. When your adjustments are finished, return to the last page dis-  
played by repeatedly pressing EXIT.  
IMPORTANT ALARM NOTES:  
Anchor Alarm — The anchor alarm may be triggered even when  
you are sitting still. Typically, this happens when using small (less  
than 0.05 mile) anchor alarm ranges.  
Arrival Alarm — If you set the arrival alarm's distance to a small  
number (less than 0.05 mile), the unit may not show navigation  
data to the next waypoint after you arrive at the first one because  
you may not be able to come close enough to the first waypoint to  
trip the arrival alarm.  
Auto Satellite Search  
When your GPS receiver is turned on for the first time, it will not know  
your position. The unit begins searching for the satellites using the  
data it acquired the last time it was turned on, probably at the factory.  
Since it's almost certain that you are not at the factory, it is probably  
looking for the wrong satellites.  
If it doesn't find the satellites it's looking for after approximately one  
minute, it switches to Auto Search, looking for any satellite in the sky.  
Once the unit locks onto the satellites, it should take less than a minute to  
find your position the next time it's turned on, provided you have not  
moved more than approximately 100 miles from the last location it was  
used.  
GPS Auto Search on the Satellite Status Menu.  
You can force the unit to switch to auto search mode.  
1. Press PAGES and switch to the Satellite Status screen.  
2. Press MENU|to GPS AUTO SEARCH|ENT|to YES|ENT.  
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Coordinate System Selection  
The Coordinate System Menu lets you select the coordinate system to  
use when displaying and entering position coordinates.  
Menus for changing coordinate system used to display positions.  
To get to Coordinate System Selection:  
1. Press MENU|MENU|to GPS SETUP|ENT.  
2. Press to COORDINATE SYSTEM|ENT.  
To change the coordinate system  
1. Press ENT while COORDINATE SYSTEM is highlighted.  
2. Press the arrow keys to highlight the desired format. Press ENT to  
select it. Press EXIT to close the menus.  
Configure Loran TD menu.  
To setup Loran TD:  
1. If the Loran TD conversion is chosen, you must enter the local Loran  
chain identification for the master and slaves.  
2. Select SETUP LORAN TD at the bottom of the Coordinate System menu  
and select the ID. Press EXIT to close this menu.  
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Map Fix  
Map Fix is used with charts or maps. This system asks for a reference  
position in latitude/longitude, which you take from a marked location  
on the map. It then shows the present position as distance on the map  
from that reference point.  
For example, if it shows a distance of UP 4.00" and LEFT 0.50", you  
then measure up four inches and to the left a half-inch from the refer-  
ence point on the map to find your location.  
To configure a map fix:  
1. Take your map of the area and determine a reference lati-  
tude/longitude.  
NOTE:  
Please note that in order for this system to work, the lati-  
tude/longitude lines must be parallel with the edge of the map.  
USGS maps are parallel, others may not be. Also, this works better  
with smaller scale maps.  
2. Once you have picked a reference position, save it as a waypoint. Press  
EXIT repeatedly to return to the main display.  
3. Press MENU|MENU|to GPS SETUP|ENT.  
4. Press to COORDINATE SYSTEM|ENT.  
5. Press to SETUP MAP FIX|ENT. The following screen appears with MAP  
SCALE is highlighted.  
6. Press ENT and enter the map's scale. This is  
generally at the bottom of the paper map. It's  
shown as a ratio, like 1:24000.  
7. Press EXIT and the unit returns to the  
Configure Map Fix screen.  
8.  
Press  
to  
SELECT  
ORIGIN  
WAYPOINT|ENT|ENT|ENT to bring up the way-  
point list.  
9. Select the waypoint that you saved the  
reference point under and press ENT. The unit  
displays a waypoint information screen with the command SET AS ORIGIN  
selected.  
10. Press ENT and the unit returns to the Configure Map Fix menu.  
11. Press EXIT to close the menu.  
12. Press to COORD SYSTEM|ENT, select MAP FIX from the list and press  
ENT|EXIT. All position information now shows as a distance from the  
reference point you chose.  
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Customize Page Displays  
The Plotter, Position and Navigation pages all have customizable op-  
tions. These options control which information is displayed on each page.  
Customize Position Page  
1. While on the GPS Position Page, press MENU|to CUSTOMIZE|ENT.  
The display box in the top left corner begins flashing.  
2. Use the arrow keys to select a display box. With the display box  
highlighted and flashing, press ENT to open a list of options.  
3. Scroll and to select a different display option, then press ENT. Af-  
ter all options are set, press EXIT to return to the page display.  
Customize Plotter or Navigation Page  
1. While on the Plotter or Navigation pages, press MENU|to CUSTOM-  
IZE|ENT.  
2. Press or to select a display you would like to see on the plotter  
page. With the display highlighted, press ENT. The selected display is  
checked and moves to the top of the list.  
3. After all options are set, press EXIT to return to the page display. Dis-  
play boxes at the bottom of the screen now provide the customized  
data.  
GPS Setup Menu, left; GPS Simulator menu, right.  
GPS Simulator  
The GPS simulator allows you to use the unit in simulation mode.  
To access GPS Simulator:  
1. Press MENU|MENU|to GPS SETUP|ENT.  
2. Press to GPS SIMULATOR|ENT. The GPS Simulator Menu appears.  
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Input the desired settings, then turn on the simulator by highlighting  
the GPS SIMULATOR ON box and pressing ENT. Press EXIT repeatedly to  
close this menu. A message and tone appear periodically, warning you  
that the simulator is on. To turn the simulator off, repeat the above  
steps or turn the unit off.  
Hide GPS Features  
If there is no GPS antenna/receiver module attached to this unit, the  
GPS menus and features can be hidden from view with this command.  
The default setting is off, allowing you to rotate between the Sonar  
Page and the GPS pages and features.  
To hide GPS features:  
1. Press MENU|MENU|to SYSTEM SETUP|ENT|to HIDE GPS FEA-  
TURES|ENT. The GPS menus and pages are now hidden. Repeat this step  
to restore GPS features.  
Initialize GPS  
This command is handy when you are practicing in simulator mode. In  
simulator mode, this command makes the unit operate as if it is sitting  
someplace other than its actual location. So, you and your unit could be  
located in Kansas City, but easily practice navigating in the ocean off  
Islamorada, Florida.  
1. Press MENU|MENU|to GPS SETUP|ENT|ENT.  
2. A message appears, telling you to move the cursor near the desired  
location and press ENT. When the message automatically clears, follow  
the message instructions.  
3. In a moment, your present position marker arrow appears on the  
plotter in the location you selected with the cursor. The unit will con-  
sider that spot as it's last known position until you initialize it again or  
a live satellite lock-on or a new simulator location.  
Plotter Auto Zoom  
With auto zoom on, the unit zooms out until the entire course shows,  
from the present position to the destination waypoint. As you travel  
toward the destination, the unit automatically begins zooming in — one  
zoom range at a time — always keeping the destination on the screen.  
To turn on auto zoom:  
1. From the Plotter Page, press MENU|to AUTO ZOOM|ENT|EXIT. Re-  
peat these steps to turn it off.  
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Plotter Orientation  
By default, this receiver shows the plotter with north always at the top of  
the screen. This is the way most maps and charts are printed on paper.  
To switch to a different orientation, a track-up mode rotates the plotter  
display as you turn. Another option is course-up mode, which keeps the  
plotter at the same orientation as the initial bearing to the waypoint.  
To change plotter orientation:  
1. From the Plotter Page, press MENU|to PLOTTER ORIENTATION|ENT.  
2. Use or to select the desired mode, then press ENT. Press  
EXIT|EXIT to return to the page display.  
GPS Menu, left; Plotter Orientation menu with  
the North Up plotter orientation option selected, right.  
Overlay Data  
To change the digital data shown on top of the Sonar Page or the Plot-  
ter Page:  
First, press PAGES, use the arrow keys to select the right page, then  
press EXIT.  
To select data for display:  
1. From the Plotter or Sonar page, press MENU|to OVERLAY DATA|ENT.  
2. Press or to select Data Type|ENT.  
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Overlay Data command on the Sonar Menu, at left. Overlay Data  
Shown selection menu, right. In this example, we scrolled down the  
data list to highlight "Ground Speed."  
When selected, the data type shifts to the top of the data list and a  
check mark appears beside the data type. (If you wish, you may now  
use or to select other Data Types for display.)  
3. To return to the previous page, press EXIT|EXIT.  
To turn off displayed data:  
1. From the Plotter or Sonar page, press MENU|to OVERLAY DATA|ENT.  
2. Press or to select Data Type|ENT. The selected data type disap-  
pears from the top of the list and reverts to its  
previous, unchecked position. (If you wish, you  
may now use or to select other Data Types to  
turn off.)  
3. To return to the previous page, press  
EXIT|EXIT.  
To change displayed data font size:  
1. From the Plotter or Sonar page, press MENU|↓  
to OVERLAY DATA|ENT.  
2. Press or to select Data Type|press or to Data Size|EXIT.  
The selected data type will be displayed in the new size. (To change the  
font size for another Data Type, press ENT and repeat these steps, be-  
ginning with step two above.)  
3. To return to the previous page, press EXIT.  
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Tip:  
If you wish, you can change the displayed data font size when you  
select a data type:  
1. From the Plotter or Sonar page, press  
MENU|to OVERLAY DATA|ENT.  
2. Press or to select Data Type|press or  
to select Data Size|ENT.  
Overlay Data  
The data will be shown in the new font size. To  
return to the previous page, press EXIT|EXIT.  
Pop-up Help  
Help is available for virtually all of the menu labels on this unit. By  
highlighting a menu item and leaving it highlighted for a few seconds,  
a pop-up message appears that describes the function of the menu item.  
This feature is on by default.  
System Setup Menu, left, with Pop-up Help command highlighted. At  
right, this example shows the Pop-up Help message for the Sensitivity  
command, located on the Sonar Menu.  
To turn on Popup Help:  
1. Press MENU|MENU|to SYSTEM SETUP|to POPUP HELP. With the op-  
tion highlighted, press ENT to check it (turn on) and uncheck it (turn  
off). After the option is set, press EXIT to return to the page display.  
Position Pinning  
When you are standing still or moving at extremely slow speed, a GPS  
receiver can have trouble determining the direction you are traveling.  
In the past, this resulted in a wandering plot trail that moved around  
the plotter, even if you were standing still.  
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The Position Pinning feature was developed so that when you stopped,  
the unit locked the present position on the GPS plotter until you moved  
a short distance or exceeded a very slow speed.  
To turn on Position Pinning:  
1. Press MENU|MENU|to GPS SETUP|ENT|to POSITION PINNING|ENT.  
2. Press EXIT|EXIT to return to the previous page.  
Reset Options  
This command is used to reset all features, options and settings to their  
original factory defaults. This is useful when you have changed several  
settings and want to return the unit to basic automatic operation.  
1. Press MENU|MENU|to SYSTEM SETUP|to RESET OPTIONS|ENT.  
2. Press or to YES|ENT.  
3. All menus are cleared and all options are returned to factory settings.  
Screen Contrast and Brightness  
To access the Screen menu, press MENU|MENU|ENT.  
Once in the Screen menu:  
To adjust the display's contrast:  
The CONTRAST slider bar is already selected. Press or to move the  
bar. The left end of the scale is minimum contrast; the right end is  
maximum contrast.  
Screen Command, left, and Screen Menu with Contrast bar selected,  
center. Display Mode menu, right.  
To adjust the display's brightness:  
1. Press to BRIGHTNESS. Press or to move the bar. The left end of  
the scale is minimum brightness; the right end is maximum brightness.  
To adjust the screen's display mode:  
1. Press to DISPLAY MODE|ENT|press or to select mode|EXIT.  
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Set Language  
This unit's menus are available in 10 languages: English, French, Ger-  
man, Spanish, Italian, Danish, Swedish, Russian, Dutch and Finnish.  
To select a different language:  
1. Press MENU|MENU|to SYSTEM SETUP|ENT.  
2. Press to SET LANGUAGE|ENT.  
3. Use or to select a different language and press ENT. All menus  
now appear in the language you selected.  
Set Local Time  
Using the correct local time setting is handy when estimating local ar-  
rival time while navigating. Also, the time and date are saved when a  
waypoint is created.  
To access the Set Local Time menu, you must first acquire your posi-  
tion. Once that is done: press MENU|MENU|to SYSTEM SETUP|ENT|to  
SET LOCAL TIME|ENT.  
Once in the Time Settings menu:  
To set Local Time: Press ENT. Press or to change the first character,  
then press to move the cursor to the next character. Repeat until the  
time is correct, then press ent.  
To set the Month: Press to MONTH|ENT. Press or to select the month,  
then press ENT.  
To set the Day: Press to DAY|ENT. Press or to select the day, then  
press ENT.  
To set the Year: Press to YEAR|ENT. Press or to select the year, then  
press ENT.  
The last field in this menu is CONFIG DST. This feature allows your unit  
to automatically adjust with the time change caused by Daylight Sav-  
ing Time (you should only have to set it once). Once you have each field  
set the way you want, press EXIT repeatedly.  
Show WAAS Alarm  
When the signal is available, your unit will automatically use WAAS to  
boost the accuracy of the position fix. When the WAAS signal is lost or  
acquired, an alarm message appears.  
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To show WAAS Alarm:  
1. Press MENU|MENU|to GPS SETUP|ENT|to SHOW WAAS ALARM.  
2. With the option highlighted, press ENT to uncheck it (turn off) and  
check it (turn on). After the option is set, press EXIT|EXIT to return to  
the page display.  
3. You can return to this command and press ENT again to turn the fea-  
ture on.  
Software Version Information  
You can find out what software version is running in your sonar unit by  
using the Software Information command.  
1. Press MENU|MENU|to SOFTWARE INFO|ENT.  
2. Read the information displayed on the screen.  
3. To return to the last page displayed, press EXIT|EXIT.  
Sounds and Alarm Sound Styles  
Sounds triggered by key strokes and alarms can be adjusted:  
1. You first press MENU|MENU|to SOUNDS|ENT.  
Sounds command, left. At right, the Sounds menu.  
Once in the Sounds menu:  
To set Key Press Sounds: With the option highlighted, press ENT to  
check it (turn on) and uncheck it (turn off). After the option is set, press  
EXIT|EXIT to return to the page display.  
To set Alarm Sounds: Press to ALARM SOUNDS. With the option high-  
lighted, press ENT to check it (turn on) and uncheck it (turn off). After  
the option is set, press EXIT|EXIT to return to the page display.  
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To set Alarm Volume: Press to VOLUME. Press or to move the bar.  
The left end of the scale is low volume; the right end is high volume. Af-  
ter the option is set, press EXIT|EXIT to return to the page display.  
To set Alarm Style: Press to ALARM STYLE|ENT. Press or to change the  
style, then press ENT. After the option is set, press EXIT|EXIT to return  
to the page display.  
Track Smoothing  
Track Smoothing prevents wandering of trails, the  
steering arrow, compass rose and plotter display in  
track-up mode.  
To turn on/off track smoothing:  
1. Press MENU|MENU, highlight GPS SETUP and press  
ENTER.  
2. Select TRACK SMOOTHING and press ENTER.  
Trail Options  
There are several options you can use with trails. Some affect all trails,  
other options can be applied to a particular trail. You can change the  
way trails are updated, you can display or hide trails, create a new  
trail, delete a trail, etc.  
To access the Trails Menu:  
1. Press MENU|MENU|to MY TRAILS|ENT.  
Delete All Trails  
To remove all of the trails from memory: from the Trails Menu, press →  
to DELETE ALL|ENT|to YES|ENT.  
WARNING:  
If you uncheck the Update Trail option, automatic trail  
creation and recording will be turned off. You must turn  
it back on to record trails. The default setting is on.  
Update Trail Option  
This menu lets you change the way the trail updates occur.  
To turn on/off active trail:  
1. From the Trails Menu, press to OPTIONS|ENT. With UPDATE ACTIVE  
TRAIL highlighted, press ENT to check it (turn on) and uncheck it (turn  
off).  
Update Trail Criteria (Auto, Time, Distance)  
The options are automatic, time, or distance. When it's in the default  
automatic mode, the unit doesn't update the plot trail while you're  
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traveling in a straight line. Once you deviate from a straight line, the  
unit "drops" a plot point (trail waypoint) onto the trail. This conserves  
plot trail points. If a plot trail uses all of the available points allotted to  
it, the beginning points are taken away and placed at the end of the trail.  
Main Menu, left, Trails Menu, center, Trail Options, right.  
To change update criteria:  
1. From the Trails Menu, press to OPTIONS|ENT|to UPDATE CRITERIA.  
Press or to select criteria type|ENT. If you selected Time, the Up-  
date Rate data entry box appears on the menu. If you selected Dis-  
tance, the Update Distance data entry box appears on the menu.  
Trail Update Rate (Time, Distance)  
You can update a trail by time, with a range from 1 second to 9999 sec-  
onds; the default is 3 seconds. You can update by distance, with a range  
from 0.01 mile/nm/km to 9.99 mile/nm/km; the default is 0.10 miles.  
With one of the Update Criteria selected, use the cursor arrows to high-  
light either the UPDATE RATE or UPDATE DISTANCE data entry boxes and  
press ENT. Press or to change the first character, then press to  
the next character and repeat until the entry is correct. Press EXIT to  
return to the Trail Options Menu.  
94  
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Trail Options menu: Update Time Rate setting, left, and Update Dis-  
tance setting, right.  
Specific Trail Options  
Delete Trail  
To delete a specific trail: From the Trails Menu, press to Trail  
Name|ENT. The Edit Trail menu appears as seen in the following fig-  
ure. Press to DELETE TRAIL|ENT|to YES|ENT.  
New Trail  
To manually start a new trail, in the Trails Menu, make sure NEW TRAIL  
is highlighted and press ENT|EXIT.  
Trail Visible/Invisible and Other Trail Options  
The name, maximum number of points in the trail,  
activity, and visibility are all changed on the Edit Trail  
menu screen. The Active setting determines whether  
or not the unit is recording new points for a particular  
trail.  
On the Edit Trail menu, press or to highlight the  
section you wish to change, then press ENT. Make your  
changes, then press EXIT to close this menu.  
Units of Measure  
This menu sets the speed and distance (statute or nautical miles, me-  
ters), depth (feet, fathoms, or meters) and temperature (degrees Fahr-  
enheit or Celsius). To change the units:  
95  
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Main Menu, left, Units of Measure Menu, right.  
To change unit of measure:  
1. Press MENU|MENU|to SYSTEM SETUP|to UNITS OF MEASURE|ENT.  
2. Press to the desired units and then press ENT. After all the options  
are set as desired, press EXIT|EXIT to return to the page display.  
96  
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Index  
Fish Symbols, 29, 33, 41  
A
Interpreting, 33  
FishTrack, 42  
Frequency, 5  
Accessories, 7, 21, 22  
Accessory, 19, 20, 51  
Alarm Clock, 79  
Alarms, 28, 35, 36, 37, 38, 53, 60,  
Anchor Alarm, 81, 82  
Antenna, 6, 51, 60, 86  
Arrival Alarm, 60, 71, 78, 81, 82  
ASP17, 35  
G
Grayline®, 42  
H
HyperScroll, 44  
I
B
Icons, 6, 28, 60, 73, 74, 75  
Creating, 73  
Backlights / Lighting, 5  
Batteries, 7, 19, 20, 24, 25, 51  
Brightness, 28, 53, 90  
Deleting, 73  
Navigate, 74  
C
Installation, 7, 18, 21, 22, 24  
Cancel Navigation, 53, 60, 61, 77,  
78  
K
Keel Offset, 28, 46, 47  
Keyboard, 27  
Chart Speed, 29, 38  
Compass, 55, 56, 59, 60, 65, 67, 71,  
72, 74, 78, 93  
Contrast, 5, 28, 53, 90  
Coordinate System, 83  
Cursor, 27, 29, 30, 38, 39, 53, 58,  
59, 60, 61, 62, 63, 64, 65, 66, 69,  
70, 73, 74, 75, 76, 77, 86, 91, 94  
Keypad Description, 6, 27  
L
Languages, 5, 28, 91  
M
Main Menu, 28, 36, 53, 75, 77, 94,  
96  
Man Overboard, 6, 66, 67  
Map Fix (Coordinate System), 84  
Memory Cards (MMC), 54, 60  
D
Depth Alarm, 35  
Depth Cursor, 29, 30, 38, 39  
Depth Range, 6, 17, 29, 37, 39, 40,  
41, 50, 52, 56, 57, 58, 60, 70, 86,  
94  
Automatic, 39  
Manual, 39  
Upper and Lower Limits, 29, 40  
Display Options, 31, 47, 48  
N
Navigating, 6, 59, 60, 65, 66, 70, 71,  
72, 74, 76, 77, 78  
Nearest, 61, 64, 65  
Noise Rejection, 35  
O
Off Course Alarm, 81  
Overlay Data, 29, 43, 44, 87, 88, 89  
F
P
FasTrack, 41  
File Transfer, 101  
Fish Alarm, 37, 38  
Fish Depths, 42  
Fish I.D., 29, 33, 41  
Page Displays, 31, 47, 49, 54, 60, 87  
Digital Data, 31, 32, 48  
Navigation, 54, 55, 56, 57, 59, 60,  
66, 67, 71, 75, 76, 77, 78, 85  
Plotter, 6, 28, 54, 56, 57, 58, 59,  
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60, 61, 65, 66, 67, 70, 71, 74,  
75, 76, 77, 78, 86, 87  
Sonar Chart Display Options, 31,  
47, 48  
Position, 54, 57, 60, 85  
Sonar Menu, 29, 35, 43, 44, 46, 88,  
89  
Sonar Operation  
Quick Reference, 30  
Sounds, 92  
Status Menu, 82  
Satellite Status, 54, 55, 60  
Pages, 31, 47, 54, 60, 87  
Navigation Page, 54, 55, 56, 57,  
59, 60, 66, 67, 71, 74, 75, 76,  
77, 78, 85  
Plotter Page, 6, 28, 54, 56, 57, 58,  
59, 60, 61, 65, 66, 67, 70, 71,  
74, 75, 76, 77, 78, 86, 87  
Position Page, 54, 57, 60, 85  
Satellite Status Page, 54, 55, 60  
Ping Speed, 29, 44, 45  
Pop-up Help, 28, 89  
Power, 5, 7, 19, 20, 21, 22, 23, 24,  
25, 30, 51, 52, 60  
Product Specifications, 5  
R
Range, 6, 17, 29, 37, 39, 40, 41, 50,  
52, 56, 57, 58, 60, 70, 86, 94  
Automatic, 39  
Stop Chart, 29, 50  
Sun/Moon Rise & Set Calculator, 79  
Surface Clarity, 50  
T
Temperature Sensors, 11, 47  
Track Smoothing, 93  
Trail, 6, 28, 53, 55, 56, 57, 60, 66,  
67, 68, 69, 70, 71, 72, 89, 93, 94,  
95  
Transducer, 5, 7, 8, 9, 10, 11, 12,  
13, 14, 15, 16, 17, 18, 19, 20, 22,  
23, 24, 25, 26, 30, 35, 44, 46, 47,  
51, 52  
Trip Calculator, 28, 54, 79  
Trip Down Timer, 79  
Trip Up Timer, 79  
Manual, 39  
Upper and Lower Limits, 40  
Repeat Play List, 41, 50, 76, 86, 91  
Reset Options, 28, 33, 45, 90  
Route, 6, 7, 9, 13, 14, 15, 19, 24, 25,  
28, 51, 53, 55, 56, 71, 74, 75, 76,  
77, 78, 82  
U
Units of Measure, 28, 95, 96  
Upper and Lower Limits, 29, 40  
Utilities, 28, 54, 79  
W
Create and Save, 74  
Delete, 76  
Navigate, 77, 78  
WAAS, 6, 91, 92  
Waypoints, 4, 6, 28, 53, 55, 56, 57,  
58, 60, 61, 62, 63, 64, 65, 66, 67,  
71, 72, 74, 75, 76, 77, 78, 81, 82,  
84, 86, 87, 91, 94  
S
Satellite Search, 82  
Searching, 61, 62, 64, 65, 66  
Sensitivity, 17, 29, 30, 32, 33, 45,  
46, 52, 89  
Z
Zooming, 5, 6, 28, 30, 31, 32, 48,  
50, 52, 58, 60, 70, 86  
Auto Zoom, 86  
Zoom Bar, 50  
Set Local Time, 91  
Simulator, 28, 49, 85, 86  
Software Version Information, 92  
Sonar Chart Color Mode, 47  
Zoom Pan, 50  
98  
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Notes  
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Notes  
100  
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NAVICO DATABASES LICENSE AGREEMENT  
THIS IS A LEGAL AGREEMENT BETWEEN THE END-USER WHO FIRST  
PURCHASES THIS PRODUCT AS A CONSUMER ITEM FOR PERSONAL,  
FAMILY, OR HOUSEHOLD USE ("YOU") AND LOWRANCE ELECTRONICS,  
INC., THE MANUFACTURER OF THIS PRODUCT ("WE", "OUR", OR "US").  
USING THE PRODUCT ACCOMPANIED BY THIS LICENSE AGREEMENT  
CONSTITUTES ACCEPTANCE OF THESE TERMS AND CONDITIONS. IF  
YOU DO NOT ACCEPT ALL TERMS AND CONDITIONS, PROMPTLY RE-  
TURN THE PRODUCT WITHIN 30 DAYS OF PURCHASE. PLEASE RE-  
TURN USING THE ENCLOSED UPS SHIPPING LABEL AND INCLUDE:  
PROOF OF PURCHASE, NAME, ADDRESS, AND PHONE NUMBER. YOUR  
PURCHASE PRICE AND ANY APPLICABLE TAXES WILL BE REFUNDED.  
PLEASE ALLOW 4-6 WEEKS TO PROCESS YOUR REFUND.  
1. This License Agreement applies to the one or more databases that  
your product may contain. We refer to these singly as a "Database"  
and together as the "Databases." Your product may thus include the  
"WBS Database" which contains worldwide background surface  
mapping data, the "SmartMap Database" which contains inland  
mapping data, or other Databases.  
2. The Databases that your product may contain are licensed, not sold.  
We grant to you the nonexclusive, nonassignable right to use these  
Databases for supplemental navigation reference purposes, but only  
as long as you comply with the terms and conditions of this License  
Agreement. We reserve the right to terminate this license if you vio-  
late any aspect of this License Agreement. You are responsible for  
using official government charts and prudent navigation for safe  
travel.  
3. The Databases housed in your product are protected by the copy-  
right notices appearing on the product or its screen(s). You may  
NOT modify, adapt, translate, reverse engineer, decompile, disas-  
semble, rent, lease, or resell any Database, and you may NOT create  
derivative works based upon any Database or its contents. Any un-  
authorized reproduction, use, or transfer of a Database may be a  
crime and may subject you to damages and attorney fees.  
4. This License Agreement will terminate immediately without prior  
notice from us if you fail to comply with or violate any of the provi-  
sions of this Agreement. Upon termination, you will promptly return  
all products containing one or more Databases to us.  
5. Prices and programs are subject to change without notice.  
6. This License Agreement shall be governed by the laws of the State  
of Oklahoma and comprises the complete and exclusive understand-  
ing between you and us concerning the above subject matter.  
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DATABASES LIMITED WARRANTY  
"We", "our", or "us" refers to Navico, Inc., the manufacturer of this product.  
"You" or "your" refers to the first person who purchases the product as a con-  
sumer item for personal, family, or household use. The Databases Limited War-  
ranty applies to the one or more databases that your product may contain. We  
refer to each of these as a "Database" or together as the "Databases." Your  
product may thus include the "WBS Database" which contains worldwide back-  
ground surface mapping data, the "SmartMap Database" which contains inland  
mapping data, or other Databases.  
We warrant to you that we have accurately compiled, processed, and repro-  
duced the portions of the source material on which the Databases are based.  
However, we are under no obligation to provide updates to the Databases, and  
the data contained in the Databases may be incomplete when compared to the  
source material. WE MAKE NO EXPRESS OR IMPLIED WARRANTY OF  
ANY KIND ABOUT THE ACCURACY OF THE SOURCE MATERIAL ITSELF,  
INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MER-  
CHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
If there is a defect in any Database, your exclusive remedy shall be, at our op-  
tion, either a refund of the price you paid for the product containing the defec-  
tive Database or a replacement of such product. WE WILL NOT UNDER ANY  
CIRCUMSTANCES BE LIABLE TO ANYONE FOR ANY SPECIAL, CONSE-  
QUENTIAL, INCIDENTAL, OR OTHER INDIRECT DAMAGE OF ANY  
KIND.  
Some states do not allow the exclusion or limitation of incidental or consequen-  
tial damages, so the above limitations or exclusions may not apply to you.  
This warranty does NOT apply in the following circumstances: (1) when the  
product has been serviced or repaired by anyone other than us; (2) when the  
product has been connected, installed, combined, altered, adjusted, or handled  
in a manner other than according to the instructions furnished with the prod-  
uct; (3) when any serial number has been effaced, altered, or removed; or (4)  
when any defect, problem, loss, or damage has resulted from any accident, mis-  
use, negligence, or carelessness, or from any failure to provide reasonable and  
necessary maintenance in accordance with the instructions of the owner’s man-  
ual for the product.  
We reserve the right to make changes or improvements in our products from  
time to time without incurring the obligation to install such improvements or  
changes on equipment or items previously manufactured.  
This warranty gives you specific legal rights and you may also have other  
rights which may vary from state to state.  
Your remedies under this warranty will be available so long as you can show in  
a reasonable manner that the defect occurred within one (1) year from the date  
of your original purchase, and we must receive your warranty claim no later  
than 30 days after such 1-year period expires. Your claim must be substanti-  
ated by a dated sales receipt or sales slip.  
102  
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NAVICO  
FULL ONE-YEAR WARRANTY  
"We," "our," or "us" refers to NAVICO, INC., the manufacturer of this product. "You" or  
"your" refers to the first person who purchases this product as a consumer item for per-  
sonal, family or household use.  
We warrant this product against defects or malfunctions in materials and workmanship,  
and against failure to conform to this product's written specifications, all for one (1) year  
from the date of original purchase by you. WE MAKE NO OTHER EXPRESS WAR-  
RANTY OR REPRESENTATION OF ANY KIND WHATSOEVER CONCERNING THIS  
PRODUCT. Your remedies under this warranty will be available so long as you can show  
in a reasonable manner that any defect or malfunction in materials or workmanship, or  
any non-conformity with the product's written specifications, occurred within one year  
from the date of your original purchase, which must be substantiated by a dated sales  
receipt or sales slip. Any such defect, malfunction, or non-conformity which occurs within  
one year from your original purchase date will either be repaired without charge or be  
replaced with a new product identical or reasonably equivalent to this product, at our  
option, within a reasonable time after our receipt of the product. If such defect, malfunc-  
tion, or non-conformity remains after a reasonable number of attempts to repair by us,  
you may elect to obtain without charge a replacement of the product or a refund for the  
product. THIS REPAIR, OR REPLACEMENT OR REFUND (AS JUST DESCRIBED) IS  
THE EXCLUSIVE REMEDY AVAILABLE TO YOU AGAINST US FOR ANY DEFECT,  
MALFUNCTION, OR NON-CONFORMITY CONCERNING THE PRODUCT OR FOR  
ANY LOSS OR DAMAGE RESULTING FROM ANY OTHER CAUSE WHATSOEVER.  
WE WILL NOT UNDER ANY CIRCUMSTANCES BE LIABLE TO ANYONE FOR ANY  
SPECIAL, CONSEQUENTIAL, INCIDENTAL, OR OTHER INDIRECT DAMAGE OF  
ANY KIND.  
Some states do not allow the exclusion or limitation of incidental or consequential dam-  
ages, so the above limitations or exclusions may not apply to you.  
This warranty does NOT apply in the following circumstances: (1) when the product has  
been serviced or repaired by anyone other than us; (2) when the product has been con-  
nected, installed, combined, altered, adjusted, or handled in a manner other than accord-  
ing to the instructions furnished with the product; (3) when any serial number has been  
effaced, altered, or removed; or (4) when any defect, problem, loss, or damage has resulted  
from any accident, misuse, negligence, or carelessness, or from any failure to provide  
reasonable and necessary maintenance in accordance with the instructions of the owner's  
manual for the product.  
We reserve the right to make changes or improvements in our products from time to time  
without incurring the obligation to install such improvements or changes on equipment or  
items previously manufactured.  
This warranty gives you specific legal rights and you may also have other rights which  
may vary from state to state.  
REMINDER: You must retain the sales slip or sales receipt proving the date of your  
original purchase in case warranty service is ever required.  
LOWRANCE ELECTRONICS  
12000 E. SKELLY DRIVE, TULSA, OK 74128  
(800) 324-1356  
103  
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How to Obtain Service…  
…in the USA:  
We back your investment in quality products with quick, expert service  
and genuine Lowrance parts. If you're in the United States and you  
have technical, return or repair questions, please contact the Factory  
Customer Service Department. Before any product can be returned,  
you must call customer service to determine if a return is necessary.  
Many times, customer service can resolve your problem over the phone  
without sending your product to the factory. To call us, use the follow-  
ing toll-free number:  
800-324-1356  
8 a.m. to 5 p.m. Central Standard Time, M-F  
Lowrance Electronics may find it necessary to change or end our ship-  
ping policies, regulations, and special offers at any time. We reserve the  
right to do so without notice.  
…in Canada:  
If you're in Canada and you have technical, return or repair questions,  
please contact the Factory Customer Service Department. Before any  
product can be returned, you must call customer service to determine if  
a return is necessary. Many times, customer service can resolve your  
problem over the phone without sending your product to the factory. To  
call us, use the following toll-free number:  
800-661-3983  
905-629-1614 (not toll-free)  
8 a.m. to 5 p.m. Eastern Standard Time, M-F  
…outside Canada and the USA:  
If you have technical, return or repair questions, contact the dealer in  
the country where you purchased your unit. To locate a dealer near  
you, visit our web site, www.lowrance.com and look for the Dealer Loca-  
tor.  
104  
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Accessory Ordering Information  
for all countries  
To order Lowrance accessories such as power cables or transducers,  
please contact:  
1) Your local marine dealer or consumer electronics store. Most quality  
dealers that handle marine electronic equipment or other consumer  
electronics should be able to assist you with these items.  
To locate  
a
Lowrance dealer near you, visit our web site,  
www.lowrance.com and look for the Dealer Locator. Or, you can consult  
your telephone directory for listings.  
2) U.S. customers: LEI Extras Inc., PO Box 129, Catoosa, OK 74015-0129  
Call 1-800-324-0045 or visit our web site www.lei-extras.com.  
3) Canadian customers can write:  
Lowrance/Eagle Canada, 919 Matheson Blvd. E. Mississauga, Ontario  
L4W2R7 or fax 905-629-3118.  
Shipping Information  
If it becomes necessary to send a product for repair or replacement, you  
must first receive a return authorization number from Customer  
Service. Products shipped without a return authorization will not be  
accepted. When shipping, we recommend you do the following:  
1. Please do not ship the knobs or mounting bracket with your unit.  
2. If you are sending a check for repair, please place your check in an  
envelope and tape it to the unit.  
3. For proper testing, include a brief note with the product describing  
the problem. Be sure to include your name, return shipping address  
and a daytime telephone number. An e-mail address is optional but  
useful.  
4. Pack the unit in a suitable size box with packing material to prevent  
any damage during shipping.  
5. Write the Return Authorization (RA) number on the outside of the  
box underneath your return address.  
6. For your security, you may want to insure the package through your  
shipping courier. Lowrance does not assume responsibility for goods  
lost or damaged in transit.  
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Visit our web site:  
Lowrance Pub. 988-0152-28A  
Printed in USA 042908  
© Copyright 2008  
All Rights Reserved  
Navico  
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