Pub. 988-0143-861 www.eaglesonar.com
Fish-Finding & Depth-Sounding Sonars
Installation and Operation Instructions
Copyright 2005 LEI-Eagle All rights reserved.
Eagle, FishMark and SeaFinder are registered trademarks of LEI
No part of this manual may be copied, reproduced, republished, transmitted or distributed for any purpose, without prior written consent of Eagle Electronics. Any unauthorized commercial distribution of this manual is strictly prohibited.
Eagle Electronics may find it necessary to change or end our policies, regulations, and special offers at any time. We reserve the right to do so without notice. All features and specifications subject to change without notice. All screens in this manual are simulated. On the cover: SeaFinder 640c DF shown. Other models covered in the manual are similar.
For free owner's manuals and the most current information on this product, its operation and accessories, visit our web site:

www.eaglesonar.com

Eagle Electronics P.O. Box 669 Catoosa, OK USA 74015 Printed in USA.

Table of Contents

Read Me First!...1 Capabilities and Specifications: FishMark 640c..2 SeaFinder 640c DF....2 How Sonar Works...4 How to Use this Manual: Typographical Conventions..5 Arrow Keys....5 Keyboard...5 Menu Commands....5 Instructions = Menu Sequences..5 Section 2: Installation & Accessories..7 Preparations....7 Transducer Installation...7 Recommended Tools and Supplies..8 Selecting a Transducer Location...9 How low should you go?...10 Shoot-Thru-Hull vs. Transom Mounting..11 Transom Transducer Assembly and Mounting..12 Trolling Motor Bracket Installation (single-frequency only).19 Transducer Orientation and Fish Arches..20 Shoot-Thru-Hull Preparation...21 Testing Determines Best Location..22 Shoot-Thru-Hull Installation...24 Speed/Temperature Sensors..26 Optional Speed Sensor Installation..27 Power Connections....29 Mounting the Unit: Bracket, In-Dash or Portable..31 Bracket Installation...32 In-Dash Installation...34 Portable Installation...34 Basic Sonar Operation...37 Keyboard....37 Power/lights on and off...38 i
Main Menu....39 Pages...40 Basic Sonar Quick Reference..45 Sonar Operations...46 Fish Symbols vs. Full Sonar Chart..50 Other Free Training Aids..50 Section 4: Sonar Options & Other Features..52 ASP (Advanced Signal Processing)..53 To change the ASP level...54 Alarms...54 Depth Alarms...55 Zone Alarm...56 Fish Alarm...57 Backlight and Contrast Level...58 Calibrate Speed....59 Chart Speed...60 ColorLine....61 Depth Cursor...62 Depth Range - Automatic...63 Depth Range - Manual...64 FasTrack....65 Fish I.D. (Fish Symbols & Depths)..65 To turn the Fish I.D. feature on..67 FishTrack...67 To turn on FishTrack...67 Frequency (Change Transducer Frequency) (SeaFinder only).68 To change the frequency setting to 50 kHz..69 To change the frequency setting to 200 kHz..69 HyperScroll...69 Noise Rejection...69 Overlay Data...69 Ping Speed & HyperScroll..72 To change Ping Speed...73 To adjust Sensitivity...73 ii
To turn off HyperScroll...74 Pop-up Help...74 Reset Options...75 Reset Water Distance..76 Set Keel Offset...76 Sensitivity & Auto Sensitivity...78 Automatic Sensitivity...78 To turn Auto Sensitivity back on..79 Set Language...80 Software Version Information...80 Sonar Chart Mode...80 To change the chart mode color scheme..81 Sonar Page & Sonar Chart Display Options.81 Full Sonar Chart...81 Split Zoom Sonar Chart...82 Digital Data/Chart...83 Sonar Simulator...85 Stop Chart...86 Surface Clarity...87 To adjust the Surface Clarity level..87 Transparency...88 To adjust Menu Transparency level...89 Units of Measure...89 Zoom & Zoom Bar...90 Zoom Pan....91 Section 5: Troubleshooting...92 Unit won't turn on...93 Unit operates only in demo mode..93 Unit freezes, locks up, or operates erratically..93 Weak bottom echo, digital readings erratic, or no fish signals.94 No fish arches when the Fish I.D. feature is off:..95 Noise....95 Section 6: Supplemental Material...97 iii

Capabilities and Specifications: FishMark 640c, SeaFinder 640c DF
General Display:.. 5.0" (12.7 cm) diagonal 256-color TFT LCD; programmable to viewing preference. Resolution:.. 640V x 480H pixel resolution; 307,200 total pixels Backlighting:. Backlit screen and keypad with multiple lighting levels for night use. Input power:. 10 to 15 volts DC. Case size:.. 5.4" H x 6.9" W x 3.4" D (13.8 x 17.6 x 8.6 cm); sealed and waterproof; suitable for saltwater use. 2
Back-up memory:.. Built-in memory stores sonar settings for decades. Languages:.. 10; menu languages selectable by user. Sonar Frequency:.. 50/200 kHz for SeaFinder 640c DF; 200 kHz for FishMark 640c. Transducers:. A dual-frequency Skimmer transducer with built-in temperature sensor is packed with the SeaFinder 640c DF. It has 35/12 cone angles. A single-frequency Skimmer transducer with built-in temperature sensor is packed with the FishMark 640c. It has a 20 cone angle. Transducers operate at speeds up to 70 mph (61 kts) Watts:. SeaFinder 640c DF: 4,000 watts peak-topeak/500 watts RMS. FishMark 640c: 1,500 watts peak-to-peak/100 watts RMS. Sonar sounding Depth capability:. SeaFinder 640c DF: 1,500 feet (457 meters). FishMark 640c: 800 feet (244 meters). Actual capability depends on transducer configuration and installation, bottom composition and water conditions. 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. 3
Surface water temp:.. Yes. Speed/distance log:. Optional (requires optional speed sensor). NOTICE! The storage temperature range for your unit is from -4 degrees to +167 degrees Fahrenheit (-20 degrees to +75 degrees Celsius). Extended storage 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. The phone numbers are listed on the last page.

Alignment letters Alignment positions Transducer bracket Insert and align ratchets. Transducer

Transducer bracket

Transducer

Ratchet

Add ratchets to bracket and transducer.
2. Aligning the transducer on the transom. A. One-piece bracket: 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. 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 3A. If it doesn't, repeat step 2A, 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.
B. Two-piece bracket: Assemble the transducer and bracket as shown in the following figure. Temporarily slide the bolt though the transducer assembly but don't tighten the nut at this time. Hold the assembled transducer and bracket 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" positions are correct for your hull. If the transducer's face isn't parallel with the ground, remove and disassemble the transducer and ratchets. Place the ratchets into the bracket holes with the letter "B" aligned with the bracket alignment mark. Place them on the transducer aligned with the 12 o'clock position on the transducer stem. 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 3B. If it doesn't, repeat step 2B, but use a different alignment letter until you can place the transducer on the transom correctly.

Bolt Flat washer

Lock washer Nut Flat washer
Assemble transducer and bracket.
3. Assembling the transducer. A. One-piece bracket: Once you determine the correct position for the ratchets, assemble the transducer as shown in the following figure. Don't tighten the lock nut at this time.

Nut Metal washer

Rubber washers Bolt

Metal washer

B. Two-piece bracket: Once you determine the correct position for the ratchets, assemble the transducer as shown in the figure in step 2B. Don't tighten the lock nut at this time. 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! 16
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. For the one-piece bracket, use the #29 bit (for the #10 screws). For the two-piece bracket, use the #20 bit (for the #12 screws).
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. A. One-piece bracket: Remove the transducer from the bracket and reassemble it with the cable passing through the bracket over the bolt as shown in the following figures.
For single-frequency Skimmer, route cable over bolt and through bracket. Side view shown at left and seen from above at right.
Both bracket types: 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 mounting screws, sealing them with the caulking 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 17
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 transducer to transom. Rear view of dual-frequency Skimmer shown.
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 entering 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 will be 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 sealant 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 transducer 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 (single-frequency only) 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.)
Bolt Internal tooth washer Nut TMB-S bracket
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. Position the transducer to aim straight down when the motor is in the water. Tighten the strap securely. 3. Route the transducer cable alongside the trolling motor shaft. Use plastic ties (not included) to attach the transducer cable to the trolling 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 transducer is ready for use. 19
Transducer mounted on trolling motor, side view.
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 back Transducer aimed too far forward
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 transducer 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 remove any oil film. Oil and dirt on the face will reduce the sensitivity or may even prevent operation. Shoot-Thru-Hull Preparation

Hulls With Flotation 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 layers. 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 manufacturer to confirm your hull specifications.
Fill with resin Fill with resin Flotation material Inner hull

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 directly 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.
Transducer location (high speed) Transducer location (trolling 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 22
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

For the ultimate training aid download the free emulator software for your unit. Aside from being just plain fun, this program can help you learn both basic and advanced operations without burning boat fuel. Eagle is one of the first sonar manufacturers to provide this type of training tool for customers. The emulator software simulates the actual sonar unit on your home computer. You can run it from your computer keyboard or use your mouse to press the virtual keys. Easy download and installation instructions are available on our web site.
Section 4: Sonar Options & Other Features
Material in this section is arranged in alphabetical order.
ASP (Advanced Signal Processing)
The ASP feature 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 possible under most conditions. The ASP feature is an effective tool in combating noise. In sonar terms, noise is any undesired signal. It is caused by electrical and mechanical sources such as bilge pumps, engine ignition systems and wiring, air bubbles passing over the face of the transducer, even vibration from the engine. In all cases, noise can produce unwanted marks on the display. The ASP feature has four settings: Off, Low, Medium and High. If you have high noise levels, try using the "High" ASP setting. However, if you are having trouble with noise, we suggest that you take steps to find the interference source and fix it, rather than continually using the unit with the high ASP setting. There are times when you may want to turn the ASP feature off. This allows you to view all incoming echoes before they are processed by the ASP feature.
Sonar Menu (left) with Sonar Features selected. In the Sonar Features menu (center) the SeaFinder's Noise Rejection feature is selected with ASP in the default low setting. The Noise Rejection feature (far right) is set the same in the FishMark unit.
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.

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 ALARM| to Zone Alarm ENABLED| to ADJUST ZONE|ENT. UPPER LIMIT, then press or to move the top of the bar to the desired
2. To set the upper boundary for the Zone Alarm, use or to select
depth. 3. To set the lower boundary for the Zone Alarm, use or to select LOWER LIMIT, then press or to move the bottom of the bar to the desired depth. 56
Sonar Alarms menu (left) with Adjust Zone command selected. Adjust Zone Alarm selection box (right) with Upper Limit selected.
4. Press EXIT| to Zone Alarm ENABLED|ENT|EXIT. Now, any echo fish, bottom, structure within the zone alarm's depth range will trigger the zone alarm. 5. To turn the alarm off press
To switch to a different depth setting, open the Sonar Alarms menu and repeat the instructions in steps 3 and 4 above. Fish Alarm Use the fish alarm to receive an audible alarm when fish or other suspended objects are detected by the Fish I.D. feature. Fish I.D. must be turned on for the Fish Alarm to work. A different tone sounds for each fish symbol size shown on the display.
Sonar Alarms menu with Fish Alarm selected. The check box to the left is blank, indicating the alarm is turned off. To turn the Fish Alarm on:
1. Press ALARM| to Fish Alarm|ENT|EXIT. 2. To turn off the alarm, press ALARM| to Fish Alarm|ENT|EXIT.
Backlight and Contrast Level
When you turn the unit on it defaults to the maximum backlight level. To adjust the display's backlight level select SCREEN from the Main Menu. From the Screen menu you can adjust the Contrast and Brightness levels by using the slide bars. The backlight level can also be controlled by using the PWR key. Pressing the PWR key will scroll the unit through three different lighting levels. From the Screen menu you can also select DISPLAY MODE. See the following image. In Display Mode you can adjust the unit's screen settings from either Normal, High Contrast or Night View. The Display Mode setting you choose will probably depend on your fishing conditions.

HyperScroll

See the entry on Ping Speed, which controls the HyperScroll feature.

Noise Rejection

See the entry on Advanced Signal Processing in this section.

Overlay Data

To change the digital data shown "floating" on top of the Sonar Page:
To select data for display:
1. Press MENU| to OVERLAY DATA|ENT. 2. Press or to select Data Type|ENT.
Overlay Data command (left) on the Sonar Menu. Overlay Data Shown selection menu at right. In this example, Depth will be displayed in a large font.
When selected, the data type shifts to the top of the data list and a check mark appears beside the data type. You can now use or to select other Data Types for display.
Data list showing Water Speed selected to display on Sonar Page.
3. To return to the previous page, press EXIT.
To turn off displayed data: 1. Press MENU| to OVERLAY DATA|ENT.
2. Press or to select Data Type|ENT. The selected data type disappears 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.
To change displayed data font size: 1. 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, beginning with step two above. 3. To return to the previous page, press EXIT.
If you wish, you can change the displayed data font size when you select a data type: 1. From the Sonar page, press MENU| to OVERLAY DATA|ENT. 2. Press or to select Data Type|press or to select Data Size|ENT. The data will be shown in the new font size. To return to the previous page, press EXIT.
Sonar Page with Overlay Data turned on. This example shows Depth, Water Temperature and Water Speed.
NOTE: Some data types can be displayed in only one font size. If that is the case, the Data Size box will not be displayed for that data type.
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. At normal boating speeds, this automatically provides enough return echoes to refresh the screen and scroll the chart at maximum chart speed. However, when you are running at high speeds, or just want the fastest possible screen update, you may want to use the HyperScroll feature. When you change the Ping Speed to any setting greater than 50 percent, the unit automatically enters HyperScroll mode. The faster ping rate allows you to maintain a high-detail picture on the screen. The screen refresh rate and chart scroll speed can keep pace with the boat as it moves quickly over the bottom terrain. 72

Main Menu (left) with Reset Options command selected. The Reset Options dialog box (right) with "Yes" selected.

Reset Water Distance

The sonar chart's Digital Data display option includes a box that shows distance traveled, called Water Distance. This information is calculated from an optional water speed sensor. The Water Distance window can be reset to zero using the Reset Water Distance command. Press MENU|MENU| to RESET WATER DISTANCE|ENT. The menus are cleared and the water distance is reset to 0.00.

Set Keel Offset

This unit measures water depth from the face of the transducer. Since the transducer is installed below the water surface, the distance displayed by the digital depth, chart depth scale, chart cursor or fish symbols is not the exact water depth. If the transducer is 1 foot below the surface and the screen shows the water depth as 30 feet then the actual depth is 31 feet. On sailboats or other large vessels with deep drafts, the distance between the transducer installation and the keel or lower engine unit can be several feet. In those cases, an inexact depth reading could result in 76
grounding or striking underwater structure. The Keel Offset feature eliminates the need for the navigator to mentally calculate how much water is under the keel. Keel Offset lets you calibrate the digital depth, chart depth scale, chart cursor depth and fish symbol depth displayed on the screen. To calibrate the depth indicators, first measure the distance from the face of the transducer to the lowest part of the boat. In this example, we will use 3.5 feet. This will entered as a negative 3.5 feet, which makes the depth indicators perform as if the transducer's lower in the water than it really is. 1. Press MENU|MENU| to SET KEEL OFFSET|ENT. 2. The Keel Offset dialog box appears. Press to change the plus (+) sign to a minus () sign. 3. Press to the first number, then press to change the number to 3 4. Press to the second number, then press to change the number to 5, then press EXIT. The depth indicators now accurately show the depth of water beneath the keel. NOTE: If knowing the exact depth of water beneath the keel is less important, you can calibrate the depth indicators so that they show the actual water depth from surface to bottom. To do this, first measure the distance from the face of the transducer up to the surface (the water line on the boat). In this example, we will use 1.5 feet. This will be entered as a positive 1.5 feet, which makes the depth indicators perform as if the transducer's higher in the water than it really is. 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 to the first number, then press to change the number to 1.

Weak bottom echo, digital readings erratic, or no fish signals: 1. Make sure 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 inside the hull, be sure it is shooting through only one layer of fiberglass and that it is securely bonded to the hull. When attaching a transducer to the inside of a hull, ONLY use the epoxy available from LEI (order information is inside the back cover). Do NOT use RTV silicone rubber adhesive or any other type of epoxy. The LEI epoxy is specially formulated so that it will cure properly for shoot-through applications. 2. Electrical noise from the boat's motor can interfere with the sonar. This causes the sonar to automatically increase its Discrimination or noise rejection feature. This can cause the unit to eliminate weaker signals such as fish or even structure from the display. 3. The water may be deeper than the sonar's ability to find the bottom. If the sonar can't find the bottom signal while it's in the automatic mode, the digital sonar display will flash continuously. It may change the range to limits far greater than the water you are in. If this happens, place the unit in the manual mode, then change the range to a realistic one, (for example, 0-100 feet) and increase the sensitivity. As you move into shallower water, a bottom signal should appear. 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 reading 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 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 cavitation.
2. Electrical noise from the boat's motor can interfere with the sonar. This causes the sonar to automatically increase its Discrimination or noise rejection feature. This can cause the unit to eliminate weaker signals such as fish or even structure from the display. 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 sure 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 display 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. For example, you will have much better luck seeing fish arches with a 30 to 60 foot range than a 0 to 60 foot range. This enlarges the targets, allowing the display to show much more detail. 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 A major cause of sonar problems is electrical noise. This 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, first try to determine the cause. With the boat at rest in the water, the first thing you should do is turn all electrical equipment on the boat off. Make sure the engine is also off. Turn your sonar on, then turn off Noise Reject [also known as the ASP feature (Advanced Signal Processing)]. Sensitivity should be set at 90-95 percent. There should be a steady bottom 95

signal on the display. Now turn on each piece of electrical equipment on the boat and view the effect on the sonar's display. For example, turn on the bilge pump and view the sonar display for noise. If no noise is present, turn the pump off, then turn on the VHF radio and transmit. Keep doing this until all electrical equipment has been turned on, their effect on the sonar display noted, then turned off. 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. VHF radio antenna cables radiate noise when transmitting, so be certain to keep the sonar's wires away from it. You may need to route the sonar unit's power cable directly to the battery to isolate it from other wiring on the boat. If no noise displays on the sonar unit from electrical equipment, then make certain everything except the sonar unit is turned off, then start the engine. 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. Again, routing the power cable directly to the battery helps eliminate noise problems. Make certain to use the in-line fuse supplied with the unit when wiring the power cable to the battery. When no noise appears on the sonar unit after all of the above tests, then the noise source is probably cavitation. Many novices or persons with limited experience make hasty sonar installations which function perfectly in shallow water, or when the boat is at rest. In nearly all cases, the cause of the malfunction will be the location and/or angle of the transducer. The face of the transducer must be placed in a location that has a smooth flow of water at all boat speeds. Read your transducer owner's manual for the best mounting position.
Section 6: Supplemental Material FCC Compliance
This device complies with Part 15 of the U.S. Federal Communications Commission (FCC) Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications not expressly approved by the manufacturer could void the user's authority to operate the equipment. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the factory customer service department for help.

Position points:. 1,000 waypoints; 1,000 event marker icons. Audible alarms:. Arrival/off-course/anchor. Graphic symbols for waypoints or event marker icons:.. 42. Routes:.. 100, up to 100 waypoints per route. Plot Trails:.. 10 savable; up to 10,000 points per trail. Zoom range:.. 40 ranges; 0.02 to 4,000 miles. NOTE: The above memory capacities refer only to the units on-board memory. The amount of GPS or sonar data you can record and save for recall later is limited only by the number and size of the MMC cards you have. NOTICE! The storage temperature range for your FishElite 640c and SeaCharter 640cDF is from -4 degrees to +167 degrees Fahrenheit (-20 degrees to +75 degrees Celsius). Extended storage 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. Customer service numbers are listed on the last page of this manual.

How Eagle Sonar Works

Sonar has been around since the 1940s, so if you already know how it works, skip down to read about the relatively new technology of GPS. But, if you've never owned a sonar fish finder, this segment will tell you the under water basics. Sonar is an abbreviation for SOund NAvigation and Ranging, a technology developed during World War II for tracking enemy submarines. A sonar consists of a transmitter, transducer, receiver and display. Here's how it locates the bottom and finds fish. The transmitter emits an electrical impulse, which the transducer converts into a sound wave and sends into the water. (The sound frequency can't be heard by humans or fish.) The sound wave strikes an object (fish, structure, bottom) and bounces back to the transducer, which converts the sound back into an electrical signal. The receiver amplifies this return signal, or echo, and sends it to the display, where an image of the object appears on the scrolling sonar 5
chart. The sonar's microprocessor calculates the time lapse between the transmitted signal and echo return to determine the distance to the object. The whole process repeats itself several times each second. Your unit can record a log of the sonar signals that scroll across the screen and save them to the MMC memory card. (These recordings are also called sonar charts or sonar graphs.) You can replay this sonar log in the unit using the Sonar Simulator function, or play it back on a personal computer using our free Sonar Viewer or product emulator. The viewer and emulator are available for download from the Eagle web site, www.eaglesonar.com. You can save several different sonar log files, erase 'em and record new ones, over and over again. The size of your sonar recordings is only limited by the free space available on your MMC.

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 3A. If it doesn't, repeat step 2A, 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.
B. Two-piece bracket: Assemble the transducer and bracket as shown in the following figure. Temporarily slide the bolt though the transducer assembly but don't tighten the nut at this time. Hold the assembled transducer and bracket 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" positions are correct for your hull. If the transducer's face isn't parallel with the ground, remove and disassemble the transducer and ratchets. Place the ratchets into the bracket holes with the letter "B" aligned with the bracket alignment mark. Place them on the transducer aligned with the 12 o'clock position on the transducer stem. 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 3B. If it doesn't, repeat step 2B, but use a different alignment letter until you can place the transducer on the transom correctly.
Lock washer Nut Flat washer Flat washer
Assemble transducer and bracket.
3. Assembling the transducer. A. One-piece bracket: Once you determine the correct position for the ratchets, assemble the transducer as shown in the following figure. Don't tighten the lock nut at this time.

Nut Metal washer

Rubber washers Bolt

Metal washer

B. Two-piece bracket: Once you determine the correct position for the ratchets, assemble the transducer as shown in the figure in step 2B. Don't tighten the lock nut at this time. 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. For the one-piece bracket, use the #29 bit (for the #10 screws). For the two-piece bracket, use the #20 bit (for the #12 screws).

Transom Transom

Position transducer mount on transom and mark mounting holes. Side view shown (left) and seen from above (right).
5. Attaching transducer to transom. A. One-piece bracket: Remove the transducer from the bracket and reassemble it with the cable passing through the bracket over the bolt as shown in the following figures.

Spread epoxy here

Sand this surface (unit's face) Orient the Skimmer with the nose facing the bow of the boat. To bow
Epoxy transducer to hull.
WARNING: Use only the epoxy available from LEI. It has been formulated to work with these installation procedures. Other epoxy types may be too thin or may not cure to the right consistency for optimum transducer performance. 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 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! Apply the remaining epoxy 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 epoxy 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. 27
5. After the epoxy has cured, route the cable to the sonar unit and it's ready to use.
Speed/Temperature Sensors
This unit can accept as many as two temperature sensors, which can be used to monitor the temperature of surface water, a live well or some other location. These units can also accept an optional speed sensor for showing speed and distance traveled. However, you can only use one accessory at a time. If you would like to use a speed sensor and a second temperature sensor at the same time, you will need a combination device. NOTE: This unit is packed with a transducer containing a built-in temp sensor. The SeaCharter package also includes a speed sensor. If you have a FishElite 640c and want a speed sensor or additional temp sensor, see the Accessory Ordering Information in the back of this manual. If a second temp sensor is used, it must be the model TS-2U. This model has a fixed electronic address which designates it as the second of two temp sensors. Dual temperatures are only displayed on the Full Chart page. The Large Digital page will only display the primary temperature sensor. See the following wiring diagram for temperature and speed sensor combinations.

Sonar Menu with Sensitivity command selected (left). The Sensitivity Control Bar (right).
NOTE: If you want to change the sensitivity in Manual Mode, first turn off Auto Sensitivity. From the Sonar Page, press MENU| to AUTO 51
SENSITIVITY|ENT| to SENSITIVITY|ENT. Press to pick a different sensitivity setting. When it is set at the desired level, press EXIT.
While you are experimenting and learning, it is possible to scramble the settings so the sonar picture disappears from your screen. If that happens, remember it is easy to switch back to full automatic operation by restoring the default settings. To Restore Default Settings: 1. Press MENU|MENU| to SYSTEM SETUP|ENT| to RESET OPTIONS|ENT. 2. A confirmation message will appear. Press to YES|ENT. All options are reset and the unit reverts back to the Map Page at the 4000-mile zoom range. Recorded sonar logs or GPS data will be unchanged. Fish Symbols vs. Full Sonar Chart You may have noticed in the quick reference we used fish arches in full sonar chart mode for our example and not the popular Fish I.D. fish symbol feature. Here's why. Fish I.D. is an easier way for a sonar novice to recognize a fishy 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 recommend you turn off Fish I.D. and begin learning to interpret fish arches. Fish I.D. is most handy when you are in another part of the boat or performing some task that prevents you from watching the sonar screen. Then, you can turn on Fish I.D. and the audible fish alarm. When that lunker swims under your boat, you will hear it! Fish I.D. can also be useful when you want to screen out some of the sonar detail gathered by your unit. For example, in one case fisherman in San Francisco Bay saw clouds of clutter in the water but no fish arches. When a down rigger was pulled up, it brought up several small jellyfish. The fisherman switched their sonar to Fish I.D., which screened out the schools of jellyfish and clearly showed the game fish there as fish symbols. The sonar options section discusses Fish I.D., fish alarms and other features in greater detail.
Section 4: Sonar Options & Features
ASP (Advanced Signal Processing) The ASP feature 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 possible under most conditions. The ASP feature is an effective tool in combating noise. In sonar terms, noise is any undesired signal. It is caused by electrical and mechanical sources such as bilge pumps, engine ignition systems and wiring, air bubbles passing over the face of the transducer, even vibration from the engine. In all cases, noise can produce unwanted marks on the display. The ASP feature has four settings Off, Low, Medium and High. If you have high noise levels, try using the "High" ASP setting. However, if you are having trouble with noise, we suggest that you take steps to find the interference source and fix it, rather than continually using the unit with the high ASP setting. There are times when you may want to turn the ASP feature off. This allows you to view all incoming echoes before they are processed by the ASP feature. To change the ASP level: 1. From the Sonar Page, press MENU| to SONAR FEATURES|ENT. 2. Press to NOISE REJECTION|ENT. 3. Press to select a setting, then press ENT. 4. To return to the main page display, press EXIT|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. At normal boating speeds, this automatically provides echoes to refresh the screen and scroll the chart at maximum chart speed. When you are running at high speeds or just want the fastest possible screen update, you may want to use the HyperScroll feature. When 69
you change the Ping Speed to any setting greater than 50 percent, the unit automatically enters HyperScroll mode. These faster ping rates allow you to maintain a high-detail picture on the screen. The ping rate helps the screen refresh rate and chart scroll speed keep pace with the speed of the boat. When using HyperScroll, you may also need to manually decrease the sensitivity for optimum performance. Depending on water depth and other conditions, HyperScroll may cause a second bottom echo to return to the transducer during the next ping cycle. This can result in a large amount of clutter appearing on the screen. If this occurs, decrease the sensitivity to a level that eliminates the clutter. When you turn HyperScroll off, you can return to your original sensitivity level.
Sonar Menu with Ping Speed command selected (left). Ping Speed Control Bar (right).
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 speed. When it is set at the desired level, press EXIT. 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, then press EXIT. When you boost ping speed and switch into HyperScroll, the width of the FasTrack bar graph display doubles in width at the right side of the screen. 70
This allows you to better see sonar returns, just as you would on a flasher sonar unit. For more information on FasTrack, see its entry in this section.

For quicker sensitivity adjustments, leave the Sensitivity Control Bar on the screen as the chart scrolls. You can see the changes on the screen as you press the up and down arrows. This is handy when there is a lot of clutter in the water and you are matching the sensitivity to rapidly changing water conditions.

Sonar Chart Mode

The default color scheme for the sonar chart is White Background, but we offer other variations to suit your viewing preferences. You can select the chart to be displayed in Grayscale, Reverse Grayscale, Blue Background, Nightview, IceView or Bottom Color Tracking. 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 to Mode Name|ENT. 4. Press EXIT|EXIT to return to the Sonar Page. 74
Sonar Page & Sonar Chart Display Options
The Sonar Page Menu offers four chart display options. To access them, press PAGES| to SONAR| to Option Name|EXIT.
Pages Menu, showing sonar chart display options.
Full Sonar Chart This is the default mode used when the unit is turned on for the first time or when it is reset to the factory defaults. The bottom signal scrolls across the screen from right to left. Depth scales on the right side of the screen aid in determining the depth of targets. The line at the top of the screen represents the surface. The bottom depth and surface temperature (if equipped with a temperature sensor or a transducer 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 is zoomed when the zoom is in use.
Full Sonar Chart (left). Split Zoom Sonar Chart (center) with left window zoomed to 2X. Split Zoom chart (right) zoomed to 4X.
Split Zoom Sonar Chart A split chart shows the underwater world from the surface to the bottom on the right side of the screen. The left side shows an enlarged version of the right side. The zoom range shows at the bottom left corner of the screen. Digital Data This mode shows the chart on the right side of the screen. The left side has five digital data boxes containing Water Depth, Water Temperature, Water Speed (from an optional speed sensor), Water Distance (also requires a speed sensor) and an air temperature sensor. The Depth box also shows settings for the Shallow and Deep alarms.

2. Use to select clarity level and press EXIT repeatedly.

Zoom & Zoom Bar

Zooming in the display is the easiest way to enlarge small detail, fish signals and the bottom. This unit lets you zoom in the display by pressing the Zoom In key, ZIN. Pressing ZIN once doubles the size (2X) of all echoes on the screen. Pressing it again quadruples the size of the echoes (4X). When turned on, the zoom bar on the far right side of the screen shows which echoes will be displayed on the screen when the ZIN key is pressed. To turn on the zoom bar, press MENU| to SONAR FEATURES|ENT. Press to ZOOM BAR|ENT|EXIT|EXIT. Repeat these steps to turn it off. For example, pressing the ZIN key once will enable a 2X zoom which will show all echoes between the top and bottom of the 2X zoom bar. Pressing the key again will give a 4X zoom and only the echoes between the top and bottom of the 4X bar will show on the screen. Press ZOUT (Zoom out) to return the display to the normal mode.
Sonar Page (left). Sonar Page zoomed 2X (center). Sonar Page zoomed 4X (right).

Zoom Pan

Your unit has the handy ability to quickly zoom in on any portion of the water column. Zoom Pan lets you rapidly move the zoomed area up and down the display. By pointing your zoom at different portions of the chart as it scrolls, you can get a close-up look at structure or cover below you. To use Zoom Pan, you will have to turn off Auto Depth Range. To do this, press MENU and select Auto Depth Range. Press ENT to uncheck the box next to it, then press EXIT|ZIN and use to pan up and down the water column. Press ZOUT to return the display to the normal Zoom range.
Section 5: Sonar Troubleshooting
If your unit is not working, or if you need technical help, please use the following troubleshooting section before contacting the factory customer service department. It may save you the trouble of returning your unit for repair. For contact information, refer to the last page, just inside the back cover of this manual. Unit won't turn on: 1. Check the power cable's connection at the unit. Also check the wiring. 2. Make sure the power cable is wired properly. The red wire connects to the positive battery terminal, black to negative or ground. 3. Check the fuse. 4. Measure the battery voltage at the unit's power connector. It should be at least 10 volts. If it isn't, the wiring to the unit is defective, the battery terminals or wiring on the terminals are corroded, or the battery needs charging. 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 transducer 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 the transducer and power connector. Make sure it's securely plugged in to the unit. Weak bottom echo, digital readings erratic, or no fish signals: 1. Make sure 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 inside the hull, be sure it is shooting through only one layer of fiberglass and that it is securely bonded to the hull. When attaching a transducer to the inside of a hull, ONLY use the epoxy available from LEI (order information is inside the back cover). Do NOT use RTV silicone rubber adhesive or any other type of epoxy. The LEI epoxy is specially formulated so that it will cure properly for shoot-through applications. 2. Electrical noise from the boat's motor can interfere with the sonar. This causes the sonar to automatically increase its discrimination or noise rejection feature. This can cause the unit to eliminate weaker signals such as fish or even structure from the display. 83

Section 6: Basic GPS Operations
This section addresses the unit's most basic GPS operations. The tutorials presented in Sec. 6 follow a chronological order. Sec. 7, Advanced GPS Operations, will discuss other more advanced functions and utilities. Material in Sec. 7 is arranged in alphabetical order. Before you turn on the unit and find where you are, it's a good idea to learn about the different keys, the four Page screens and how they all work together. BUT, if you just can't wait to get outside, turn to the one-page Quick Reference on page 100.
SeaCharter 640cDF unit showing Map with Sonar page, keyboard and access door for the MMC slot.
1. PWR/LIGHT turns the unit on and off and activates the backlight. 2. PAGES Pressing this and the arrow keys (4) switches the unit between the four different page screens: Satellite Status Page, Navigation Page, Map Page and Sonar Page. 3. MENU The Menu key to show menus and submenus, which allow you to select a command or adjust a feature. This also accesses search functions for streets, intersections and highway exits. 87
4. ARROW KEYS The arrow keys are used to navigate through menus, enter data, make menu selections, move the map cursor and sonar chart cursor. 5. ENT/ICONS The Enter 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 also launches the Point-of-Interest (POI) search menus and is involved in some navigation functions. 8. ZOUT The Zoom Out key lets you zoom out the screen. On the Sonar Page, it returns you to a full sonar chart display, showing the entire water column from surface to bottom. On the Map Page, this lets you see a larger geographic area on the map with less detail. 9. ZIN The Zoom In key lets you zoom in the screen. On the Sonar Page, it enlarges fish signals and bottom detail. On the Map Page, zooming in lets you see more detail in a smaller geographic area.

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 get to the Navigation Page press PAGES| to NAVIGATION|EXIT. The navigation screen looks like the one below when you are not navigating 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 illustrated by the line extending from the arrow. The arrow pointing down at the top of the compass rose indicates the current direction of travel (track).
Track or compass heading indicator, showing direction of travel Compass rose Trail line
Navigation information displays in customizable data boxes

Present position arrow

Traveling north and recording a trail on the Navigation page. The 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, bearing to waypoint and course are shown digitally on the screen. NOTE: Remember: when Speed, Track and Position information displays are flashing, satellite lock has not been achieved and no position fix has been determined. A question mark will flash on the present position arrow in the center of the compass rose. 92
Speed is the velocity you are making over the ground. If you want, you can customize the Speed data box to display Closing Speed instead. Closing Speed is also known as velocity made good. It is the speed you are making toward the waypoint. For instructions, see the Customize Page Displays entry in Sec. 8. Track is the heading or the current direction you are traveling. Bearing is the line-of-sight direction from your present position to the destination. No matter what direction you are steering, the Bearing window shows the compass direction straight to the destination from your current location. Distance shows how far it is to your destination. The Off Course window shows the current cross track error. This shows the distance you are off-course to the side of the desired course line. The course line is an imaginary line drawn from your position when you started navigating to the destination. The course line is shown on the Navigation screen and Map Page screens as a red line.

Navigate a Back Trail 1. Press MENU|MENU| to MY TRAILS|ENT. 2. Press to enter the Saved Trail list, then use to select the desired Trail Name|ENT. 3. Press to NAVIGATE|ENT. 4. Press to REVERSE ROUTE|ENT| to NAVIGATE|ENT. The unit shows navigation information along the trail, in reverse. NOTE: If you are already located at or near the end of your trail, the arrival alarm will go off as soon as you hit Enter. Just press EXIT to clear the alarm and proceed. 5. Now, begin moving and let your unit guide you. 6. When you reach your destination, be sure to cancel your navigation. Press MENU|MENU| to CANCEL NAVIGATION|ENT. A confirmation message will appear. Press |ENT.
Transfer Custom Maps and GPS Data Files
Custom Maps: Custom maps work only from the MMC card or SD card. When a card containing a Custom Map File is loaded into the unit, the unit automatically loads the map into memory when the unit is turned on. Instructions for copying Custom Map Files to an MMC are contained in the instruction manual for your MMC card reader and MapCreate 6 software. For instructions on inserting an MMC into the unit, see Sec. 2, Installation/Accessories. GPS Data files: GPS Data Files contain waypoints, routes, trails and event marker icons. Instructions for copying GPS Data Files between your computer and an MMC are contained in the instruction manual for your MMC card reader and MapCreate 6 software.
You must enter which way you want to transfer data, from an MMC card to the unit (load) or from the unit to an MMC card (save).
GPS data automatically recorded in the unit's internal memory must be saved to the MMC (as a GPS Data File) in order to store it on your personal computer. GPS Data Files stored on an MMC must be copied from the card to the unit's internal memory before the unit can read them. 1. Insert the MMC into your unit. Press MENU|MENU| to SYSTEM SETUP|ENT| to TRANSFER MY DATA|ENT. 2. The Transfer My Data menu includes a message which tells you if an MMC is present or not. If no MMC is present, you must insert a card into the unit to activate the Load or Save commands. To transfer data from the unit to the MMC: press ENT (for SAVE.) To transfer data from the MMC to the unit: press to LOAD|ENT. 3. Saving to MMC: To accept the default name "Data" for the GPS Data File, press to SAVE DATA|ENT. If you want to rename the file (as shown in the following figures), press ENT to activate the selection box. Press to change the first character, then press to the next character and repeat until the name is correct. Then press ENT| to SAVE DATA|ENT. The unit will display first a progress then a completion message when the data transfer is finished. To return to the Page view, repeatedly press EXIT.

the arrow keys STEER WITH ARROWS command or by setting the track and speed in the dialog boxes provided on the simulator menu screen. To get to the GPS Simulator: 1. Press MENU|MENU| to GPS SETUP|ENT. 2. Press to GPS SIMULATOR|ENT. The GPS Simulator Menu appears.
GPS Setup Menu (left). GPS Simulator menu (center). Map Page showing Steer with Arrows dialog boxes (right). The traveler is following a track of 144 at a speed of 71 miles per hour.
Choose the desired settings, then turn on the simulator by highlighting the GPS SIMULATOR ON box and pressing ENT. Press EXIT repeatedly to get back to the main page display. A message and tone appear periodically to remind you the simulator is on. To turn off the simulator, repeat the steps above or turn off the unit. If you selected the Steer with Arrows command and want to remove the dialog boxes from the screen, press EXIT. That will clear the track and speed boxes without disrupting the simulation and allow you to use the map cursor. Simulating Trail or Route Navigation In Simulator mode, your unit can automatically follow a trail or route without manual steering if you use these steps: 1. From the Map Page, go to the simulator menu. Pick a STARTING POSITION at or near the beginning of your trail/route. Enter an approximate TRACK (shown in compass degrees) that will point you toward the start of the trail/route. 2. Set SPEED to zero. Select STEER WITH ARROWS command and press ENT, which turns on the simulator and returns you to the Map Page. 3. Begin navigating along the trail/route. (If you are close enough to the first waypoint, the arrival alarm will usually go off as soon as naviga139
tion begins. Press EXIT to clear the alarm.) When navigation starts, press to increase speed to the desired setting. 4. Press EXIT to turn off the steering and speed boxes. The unit will now automatically steer along the trail or route. When you arrive at your destination, cancel navigation.
You can pick any spot on the map to begin a simulation by using the Initialize GPS command. It allows you to move the position arrow to any location on the map. The command is detailed below.

Hide GPS Features

If there is no GPS antenna/receiver module attached to this unit, you can turn off its GPS features via the Hide GPS Features command. That will hide all GPS pages and menus. To hide GPS features: Press MENU|MENU| to SYSTEM SETUP|ENT| to HIDE GPS FEATURES|ENT. The GPS menus and pages are now hidden. To restore GPS Features, press MENU|MENU| to SHOW GPS FEATURES|ENT. The GPS menus and pages are now accessible.

Initialize GPS

In simulator mode, the Initialize GPS 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 practice navigating in the ocean off Islamorada, Florida. NOTE: Remember: if you want to run a simulation in a place other than your current location, you first must Initialize the GPS, then turn on the GPS Simulator. 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 map in the location you selected with the cursor. The unit will consider that spot as its last known position until changed by either a live satellite lock-on or a new simulator location.

Map Auto Zoom

This receiver has an auto zoom feature that eliminates a lot of the button pushing common with other brands of GPS receivers. It works in conjunction with the navigation features. Start navigating to a waypoint. Then, with the auto zoom mode 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 zooms in one zoom range at a time keeping your current position and the destination on the screen. To turn this feature on from the MAP PAGE, press MENU| to AUTO ZOOM|ENT|EXIT. Repeat these steps to turn it off.

Map Data

From the Map Data menu, you can turn off the map which will turn the map into a GPS plotter turn on or off pop-up map info boxes, draw map boundaries and fill water areas with white. You also can turn on or off Map Overlays, like range rings and latitude and longitude grid lines. From the Map Page, you can access the Map Data menu by pressing MENU| to MAP DATA|ENT.
Map menu (left). Map Data menu (right).
Earth Map Detail From the Map Data menu, highlight EARTH MAP DETAIL and press ENT. Select the desired level of map detail from four options: Off, Low, Medium or High. After the option is set, press EXIT.
Pop-up Map Information From the Map Data menu, highlight POPUP MAP INFORMATION and press ENT to turn it on (check) or turn it off (uncheck). After the option is set, press EXIT. Draw Map Boundaries From the Map Data menu, highlight DRAW MAP BOUNDARIES and press ENT to turn it on (check) or turn it off (uncheck). After the option is set, press EXIT. Fill Water With White From the Map Data menu, highlight FILL WATER WITH WHITE and press ENT to turn it on (check) or turn it off (uncheck). After the option is set, press EXIT. Map Overlays (Range Rings; Lat/Long Grid) The map screen can be customized with four range rings and/or grids that divide the map into equal segments of latitude and longitude. Range rings are handy for visually estimating distances on the map. The ring diameters are based on the current zoom range. At a 100-mile zoom, the screen will show two rings with your current position in the center. The large ring touching the left and right sides of the screen is 100 miles in diameter (same as the zoom range). The second smaller ring is 50 miles in diameter (always 1/2 the zoom range). The distance from your current position to the smaller ring (the ring's radius) is 25 miles (always 1/4 the zoom range). With the map cursor, you can scroll over to see the third and fourth rings. In this example, the distance to the third ring is 75 miles and distance to the fourth ring is 100 miles from your current position. To set range rings: From the Map Data menu, highlight RANGE RINGS and press ENT to turn them on (check) or turn them off (uncheck). After the option is set, press EXIT. To set Lat/Long Grid: From the Map Data menu, highlight LAT/LON GRID LINES and press ENT to turn them on (check) or turn them off (uncheck). After the option is set, press EXIT repeatedly to get back to the main page display.

Map Datum Selection

Maps and charts are based on a survey of an area covered by a map or chart. These surveys are called Datums. Maps created using different datums will show the same latitude/longitude in slightly different locations. 142
All datums have a name. The GPS system is based on the WGS-84 datum, which covers the entire world. Other datums may cover the entire world or just a small portion of it. By default, your position is shown with the WGS-84 datum. It, however, can show your position using any of 191 different datums. To change the Datum: 1. Press MENU|MENU| to GPS SETUP|ENT| to DATUM SELECTION|ENT. 2. Select the desired datum and press ENT. 3. To return to the main page display, press EXIT|EXIT. A list of the datums used by this unit is in the back of this manual.
GPS Setup Menu (left). Map Datum Menu (right).
Map Detail Category Drawn
This menu determines what mapping features are shown on the screen. This includes, waypoints, trails, icons, cities and highways, etc. You can turn on or off any of these items, customizing the map to your needs.
Map Menu (left). Map Categories Drawn Menu (right).
To get to Map Categories Drawn: 1. From the Map Page, press MENU| to MAP CATEGORIES DRAWN|ENT. 2. Scroll through the list of categories. Press ENT to turn on (check) or turn off (uncheck) a category. When a category is on, press to jump to the subcategory window. Press ENT to turn on or off subcategories. 3. Press EXIT|EXIT to get back to the main page display.

Map Orientation

By default, this receiver shows the map with north always at the top of the screen. This is the way most maps and charts are printed on paper.
In Track Up mode, map shows "N" show which direction is north.
Map orientation shown in north up (left) and track up (right).
This is fine if you are always traveling north. What you see to your left and right corresponds with the left and ride sides of the map. But if you travel any other direction, the map does not line up with your view. 144
To correct this problem track-up mode rotates the map as you turn. So what you see on the left side of the screen should always be to your left and so on. Another option is course-up mode, which keeps the map at the same orientation as the initial bearing to the waypoint. When either track-up or course-up modes are on, an "N" shows on the map screen to keep you aware of which direction is north. To change map orientation from the Map Page, press MENU| to MAP ORIENTATION|ENT. Use to select the desired mode, then press ENT. Press EXIT|EXIT to return to the page display.