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 Your 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 underwater basics. Sonar is an abbreviation for SOund NAvigation and Ranging, a technology developed during World War II for tracking enemy submarines. (Lowrance developed the world's first transistorized sportfishing sonar in 1957.) A sonar consists of a transmitter, transducer, receiver and display. In simple terms, here's how it finds the bottom, or the 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 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 sonar unit can record a log of the sonar signals that scroll across the screen and save them in its memory. (These recordings are also called sonar charts or sonar graphs.) You can replay this sonar log in the unit using the Sonar Simulator function. You can save several different sonar log files, erase 'em and record new ones, over and over again.

How Your GPS Works

You'll navigate faster and easier if you understand how this unit scans the sky to tell you where you are on the earth and, where you're going. (But if you already have a working understanding of GPS receivers 4
and the GPS navigation system, skip on ahead to Section 2, Installation & Accessories on page 9. If you're new to GPS, read on, and you can later impress your friends with your new-found knowledge.) First, think of your unit as a small but powerful computer. (But don't worry we made this unit easy to use, so you don't need to be a computer expert to find your way!) The unit includes a keypad and a screen with menus so you can tell it what to do. The screen also lets the unit show your location on a GPS plotter, as well as point the way to your destination. This unit uses an internal antenna/receiver module, which makes the whole system work something like your car radio. But instead of your favorite dance tunes, this receiver tunes in to a couple of dozen GPS satellites circling the earth. (It will also listen in to the WAAS satellites in orbit, but more about that in the upcoming segment introducing you to GPS and WAAS.) Your unit listens to signals from as many satellites as it can "see" above the horizon, eliminates the weakest signals, then computes its location in relation to those satellites. Once it figures its latitude and longitude, the unit plots that position on the GPS screen. The whole process takes place several times a second! Another portion of the unit's onboard memory is devoted to recording GPS navigation information, which includes waypoints, event marker icons, trails and routes. This lets you look back the way you came, and retrace your path. Think of this data storage like the hard drive memory in a computer or a tape in a cassette tape recorder. You can save several different GPS data files, erase 'em and record new ones, over and over again.

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.
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. 13
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 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

Memory

This unit has permanent memory that saves all user settings, even when power is removed. It does not require, nor does it use an internal backup battery, so you never have to worry about replacement batteries.
Your sonar unit will work fine right out of the box with the factory default settings. You only need to learn a few basic functions to enhance your viewing. We'll discuss them briefly here, then talk about them and all the other commands in more detail in Sec. 4, Advanced Sonar Operation. Sonar Mode has two primary menus that control its operation. They are the Main Menu and the Sonar Menu. Main Menu The Main Menu contains some basic function commands and some setup option commands. You access the Main Menu by pressing MENU|MENU. You run a command by using or to highlight the command and then pressing ENT. To clear the Main Menu screen and return to the Page display, press EXIT. (Remember, our text style for "MENU|MENU" means "press the Menu key twice." See a full explanation of our instruction text formatting on page 8, Instructions = Menu Sequences.) 32
Main Menu. Main Menu Commands
There are four "basic" Main Menu commands that you'll really want to read more about. They are: Screen commands (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 command: controls sound levels for keystrokes and alarms. If you don't like to hear a beep each time you press a key, you can turn all sounds off by setting the volume to zero. Sound is especially useful when used with the Fish I.D. fish symbol feature and fish alarm feature. Sonar Alarms command (a sub-menu of Alarms): turns alarms on or off and changes alarm thresholds. The fish alarm, used with Fish I.D., is the most popular use. It tells you when the sonar sees a fish. You can also set deep or shallow depth alarms. Popup Help command (one of the System Setup options): turns the pop-up help boxes on or off. When you select a menu command, these information boxes appear to tell you what the command does or how to use the command. The default setting is on, which is really handy while you're learning. The remaining Main Menu commands are either for GPS use, or for advanced sonar functions, mostly setting various system options. (They're all detailed later in Sec. 4, Advanced Sonar Operation, or Sec. 7, System Setup and GPS Setup Options.) The other Sonar options in the Main Menu are: Set Keel Offset command: calibrates the unit to show depth under the keel or actual depth from the surface. Sonar Simulator command: turns the simulator feature on and off. Useful for learning how to operate the unit and all its functions. Reset Options command: returns all options and auto functions to their original factory settings. It's a great safety net while you're learning and experimenting with various settings. 33

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 ALARMS|ENT| to SONAR ALARMS |ENT.
2. Press to SHALLOW ALARM DEPTH|ENT. 44
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 ALARMS|ENT | 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 ALARMS|ENT | 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 ALARMS|ENT | 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.
At left, Sonar Alarms menu, with Adjust Zone command selected. At right, Adjust Zone Alarm selection box, with Upper Limit selected.
UPPER, then press or to move the top of the bar to the desired depth.
3. To set the upper boundary for the Zone Alarm, use or to select 4. To set the lower boundary for the Zone Alarm, use or to select
LOWER, then 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 SONAR 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. Fish Alarm Use the fish alarm for a distinctive 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 checked, indicating the alarm is turned on. To turn the fish alarm on:
1. Press MENU|MENU| to ALARMS|ENT | to SONAR ALARMS|ENT. 2. Press to FISH ALARM|ENT|EXIT. 3. To turn off the alarm, press MENU|MENU| to ALARMS|ENT | to SONAR ALARMS|ENT| to FISH ALARM|ENT|EXIT.

Chart Speed

The rate that echoes scroll across the screen is called the chart speed. The default is maximum; we recommend that you leave the speed set there for virtually all fishing conditions. However, you might consider experimenting with chart speed when you are stationary or drifting very slowly. You may sometimes achieve better images as you slow down the chart speed to match how fast you are moving across the bottom. If you are at anchor, ice fishing or fishing from a dock, experiment with a chart speed around 50 percent. If you are drifting slowly, try a chart speed around 75 percent. When you are stationary and a fish swims through the sonar signal cone, the image appears on the screen as a long line instead of a fish arch. Reducing the chart speed may result in a shorter line that more closely resembles a regular fish return.

FishTrack

The FishTrack feature shows the depth of a fish symbol when it appears on the display. This lets you accurately gauge the depth of targets. This feature is available only when the Fish I.D. feature is on. The default setting for FishTrack is off. To turn on FishTrack: (Note: These instructions will turn on FishTrack and Fish I.D. at the same time.) 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. 52
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 showing Fish I.D. symbols and FishTrack depths turned on.

Grayline

Grayline lets you distinguish between strong and weak echoes. It "paints" gray on targets that are stronger than a preset value. This allows you to tell the difference between a hard and soft bottom. For example, a soft, muddy or weedy bottom returns a weaker signal which is shown with a narrow or no gray line. a hard bottom returns a strong signal which causes a wide gray line. If you have two signals of equal size, one with gray and the other without, then the target with gray is the stronger signal. This helps distinguish weeds from trees on the bottom, or fish from structure. Grayline is adjustable. Experiment with your unit to find the Grayline setting that's best for you.
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.

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 on top of the sonar page: 1. Press MENU| to OVERLAY DATA|ENT. 2. Press or to select Data Type|ENT.
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."

Waypoint information screen on waypoint 004. Screen shows name, latitude/longitude, distance to waypoint and its compass bearing. Figure at left shows Go To command; right figure shows Find On Plotter command.
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. 89
Plotter screen showing Find Waypoint.
7. To clear the search and return to the last page displayed, press EXIT|EXIT. (Before you completely exited out of the Search menus, you could have gone looking for another place.)

Navigate To a Waypoint

You can select any waypoint visible on the Plotter Page with the cursor, then use the Navigate to Cursor command (we described how to do that earlier in this section). However, you can 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. 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 selected. 4. To begin navigating to the waypoint, press ENT. 90
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
One of boating's most terrifying events is having a friend or family member fall overboard. This situation can be deadly on any body of water fresh or salt. It's particularly dangerous at night or if you're out of sight of land. Of course, the first thing to do is remain calm and then use all standard safety procedures to rescue the person. 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.

To Save a Trail 1. Press MENU|MENU| to MY TRAILS|ENT.

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.
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|EXIT|EXIT|EXIT. As you left the Edit Trail menu, you will notice that a new trail was started with a new sequential number. In the example figure below, the new trail is number 3, showing 2 points. Note that Trail 1 is inactive, but it is still visible on the plotter.
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 visible. Trails do not need to be visible in order to be active.
You can save and recall up to 10 different plot trails.
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. Caution: You also have the option of completely turning off trail recording, under the trail Options command. However, if the Update Active Trail option is left turned off, it will cancel the automatic trail creation feature. Delete a Trail This is the command used to erase or delete a trail: Press MENU|MENU| to MY TRAILS|ENT| to trail name|ENT| to DELETE TRAIL|ENT| to YES|ENT.
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 displayed on the plotter (the "Visible" option) with the factory default settings. You can selectively turn trail display off and on for any saved or active trail. In the Saved Trails List, visible trails have a check mark in front of the trail name.
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|EXIT|EXIT|EXIT.

To turn on trail display: 1. Press MENU|MENU| to MY TRAILS|ENT.
Edit a Trail Name To edit a trail name: press MENU|MENU| to MY TRAILS|ENT| to trail name|ENT|ENT. 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|EXIT|EXIT to return to the previous page display.
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.
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, navigating a trail (forward) and backtracking a trail (backward). Try each method to see which you prefer. Visual trailing 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 (from start to end) or backward (from end to start.) However, visual trailing provides no navigation information during the trip, such as the time to your destination. The other two methods provide a full range of navigation data and work with both the Plotter Page and Navigation Page. The only difference be95
tween them is "navigating a trail" follows a trail forward (from start to end) while "backtracking" follows a trail in reverse (from end to start.) When hiking at walking speed with a hand-held GPS, we often just use visual back trailing because it is a bit better at following each little turn on a foot path. At faster speeds, such as the highway or on the water, the Navigate Trail and Backtrack Trail commands are handy. Visual Trailing 1. On the Plotter Page, zoom (ZIN or ZOUT) so your flashing trail is visible. 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.

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 (unchecked.) 107
3. To change distance settings, scroll or to select the desired category, 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. 4. When your adjustments are finished, return to the last page displayed by repeatedly pressing EXIT. IMPORTANT ALARM NOTES: Anchor Alarm - The anchor alarm may be triggered even when you're sitting still. This typically 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 and you run a route (see the Navigate Routes segment), this unit may not show navigation data to the next waypoint, once you arrive at the first one, since you may not be able to come close enough to the first waypoint to trip the arrival alarm.

Auto Satellite Search

To lock onto the satellites, the GPS receiver needs to know its current position, UTC time and date. (Elevation (altitude) is also used in the equation, but it's rarely required to determine a position.) It needs this data so that it can calculate which satellites should be in view. It then searches for only those satellites. When your GPS receiver is turned on for the first time, it doesn't know what your position or elevation (altitude) is. It does know the current UTC time and date since these were programmed into it at the factory and an internal clock keeps the time while the unit is turned off. (If the time and/or date are incorrect, you can set it using the "Set Local Time" menu.) The unit begins searching for the satellites using the above data that it acquired the last time it was turned on. This probably was at the factory. Since it's almost certain that you're not at our factory, it's 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. The receiver looks for any satellite in the sky. Due to advanced technology, the auto search time has shrunk significantly from the early days of GPS. 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 haven't moved more than approximately 100 miles from the last location it was used. 108
GPS Auto Search on the Satellite Status Menu.
You can force the unit to immediately kick into auto search mode. Here's how: 1. Press PAGES and switch to the Satellite Status screen. 2. Press MENU| to GPS AUTO SEARCH|ENT| to YES|ENT.

Configure a map fix so the M52 can find your position on a printed chart or topographical map.
Press to SELECT ORIGIN WAYPOINT|ENT|ENT|ENT to bring up the waypoint list. 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; press ENT and the unit returns to the Configure Map Fix menu. Finally, press EXIT to erase this menu. Now 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.

Customize Page Displays

The Plotter, Position and Navigation pages all have customizable options. These options control which information is displayed on each page. Customize Position Page While on the GPS Position Page, press MENU| to CUSTOMIZE|ENT. The display box in the top left corner begins flashing. Use the arrow keys to select a display box. With the display box highlighted and flashing, press ENT to open a list of options. Scroll and to select a different display option, then press ENT. After all options are set, press EXIT to return to the page display. Customize Plotter or Navigation Page While on the Plotter or Navigation pages, press MENU| to CUSTOMIZE|ENT. 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. After all options are set, press EXIT to return to the page display. Display boxes at the bottom of the screen now provide the customized data.

GPS Simulator

The GPS simulator lets you use the unit as if you were outdoors navigating somewhere. It's a great way to practice using your unit. You can set the starting location by entering latitude/longitude (Starting Position) or from a stored waypoint (CHOOSE START command). You can steer your position and change speed on the plotter by using 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. 112
GPS Setup Menu, left; GPS Simulator menu, right.
Make the desired settings, then turn the simulator on by highlighting the GPS SIMULATOR ON box and pressing ENT. Press EXIT|EXIT|EXIT to erase 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. While in simulator mode, you can press EXIT to clear the steering and speed boxes from the screen while continuing the simulation. This will allow you to use the plotter cursor during a simulation. To turn steering and speed boxes back on again, return to the GPS Simulator menu, select the STEER WITH ARROWS command, press ENT, then Press EXIT|EXIT|EXIT to return to the previous page. 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 Plotter 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 Plotter 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 navigation 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 as you normally do. 113

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, right.
To adjust the display's brightness: 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: Press to DISPLAY MODE|ENT|press or to select mode|EXIT.

Display Mode menu.

Set Language
This unit's menus are available in 10 languages: English, French, German, 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 arrival 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 position. 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 charac-
ter, then press to move the cursor to the next character. Repeat until the time is correct, then press ENT. 120
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 Saving Time (you should only have to set it once). You may select which set of rules matches DST in your region, or simply accept the default. Once you have each field set the way you want, press EXIT repeatedly until you return to the previous page.

Track Smoothing option, turned on.

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.

General Trail Options

To access the Trails Menu: Press MENU|MENU| to MY TRAILS|ENT.
Main Menu, left, Trails Menu, center, Trail Options, right.
Delete All Trails To remove all of the trails from memory: from the Trails Menu, press to DELETE ALL|ENT| to YES|ENT. Update Trail Option This menu lets you change the way the trail updates occur. 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. 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 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. From the Trails Menu, press to OPTIONS|ENT| to UPDATE CRITERIA. Press or to select criteria type|ENT. If you selected Time, the Update Rate data entry box appears on the menu. If you selected Distance, 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 seconds; 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. 124
With one of the Update Criteria selected, use the cursor arrows to highlight 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.

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 operation. 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 transducer 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 protection from bangs and bumps. 9

Transducer centerline

Transom
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 frequently lose bottom signal lock while running at high speed, the transducer 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 installation (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 contact with the water. Typically, shoot-thru-hull installations give excellent high speed operation and good to excellent depth capability. There is no possibility of transducer damage from floating objects, as there is with a transommounted 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. 10

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.
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. 11
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 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

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).

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 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 signal intensity will likely decrease. 17
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 sensitivity 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 Materials." 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 bonding. After sanding, clean the hull and transducer with rubbing alcohol to remove any sanding debris. 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.

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 digital depth and surface water temperature in the corner of the screen. The auto settings will track the bottom, displaying it in the lower portion 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 information, but could omit important images. We recommend adjusting sensitivity until the background is lightly "peppered" that is, scattered dots appear, but individual objects (like fish arches or bottom structure) 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 moving 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. 30

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 recommend you turn off Fish I.D. and begin learning to interpret fish arches.
Section 4: Sonar Options & Other 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 undesired signals (noise) from sources like bilge pumps, engine ignition systems, air bubbles passing over the face of the transducer and vibration from the engine(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 shallow alarm's setting or deeper than the deep alarm's setting. These alarms can be used at the same time or individually. 35
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.

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 different 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 manual mode. There are 12 depth ranges, from 5 feet to 800 feet. 39
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 selected. 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.
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 until 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 Sonar Page showing FasTrack. FasTrack bar graph

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.

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.
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. 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 HyperScroll feature. When you change the Ping Speed to any setting 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. 44

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 operation. 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.

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. 53
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.
The unit has four GPS Page displays that represent the four major operating 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 bottom.
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.

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.) 64
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 selected.
Waypoint information screen on waypoint 004. Screen shows name, latitude/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. 7. To clear the search and return to the last page displayed, press EXIT|EXIT.
Plotter screen showing Find Waypoint.

Navigate To a Waypoint

You can select any waypoint visible on the Plotter Page with the cursor, 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. 65
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 selected. 4. To begin navigating to the waypoint, press ENT.

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 desired Trail Name|ENT. 3. Press to DELETE TRAIL| to NAVIGATE|ENT. 4. Press to NAVIGATE|ENT. The unit begins showing navigation information along the trail. 70
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.

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), toward the next waypoint, trail point 4. The M52 Pro now shows navigation 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. 72
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 appears 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 represented by a particular symbol, or you can use the cursor to delete a selected icon from the plotter.

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. 89
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.
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

Once in the Screen menu:

To access the Screen menu, press MENU|MENU|ENT. 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.

Set Language

This unit's menus are available in 10 languages: English, French, German, 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 arrival 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 position. 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 To set the Month: Press to MONTH|ENT. Press or to select the month, then press ENT.

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 consumer item for personal, family, or household use. The Databases Limited Warranty 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 background 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 reproduced 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 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. If there is a defect in any Database, your exclusive remedy shall be, at our option, either a refund of the price you paid for the product containing the defective Database or a replacement of such product. 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 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 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 owners 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. 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 substantiated by a dated sales receipt or sales slip.