Digital/Chart This mode shows the chart on the right side of the screen. The left side has seven large digital boxes containing the Water Depth at the top of the screen, (with the shallow and deep alarm settings immediately beneath the depth) Water Speed (from an optional speed sensor), Water Distance (distance travelled or log) also requires a speed sensor. Surface Water Temperature, Temperature #2, Temperature #3, and input voltage. (Note: Temperature #2 and #3 require additional temperature sensors.)
Customizing the Digital/Chart Screen The Digital/Chart screen can be customized to show different digital data than the defaults shown on the screen at the bottom of page 8. To customize this screen, press the MENU key while the Digital/Chart screen is showing. Scroll down to the bottom of this menu to the Customize label and select it. The Water Speed bar flashes, signifying that the window can be changed. Press the ENT key to show a menu of available options. Choose the data that you want shown at this location, then press the ENT key to select it. To change another, simply press the down arrow key. The ID bar will flash on the selected box. Repeat the above steps until youre finished customizing. Press the EXIT key to stop the bar from flashing. MENUS This unit uses menus extensively to guide you through its functions and features. To use the menus, press the MENU key. (Note: There are two layers of menus. Pressing the MENU key once brings up the first set of menus, pressing the menu key again brings up the second set.) Use the arrow keys to navigate through the menus. Generally, to make a selection from a menu, highlight the desired item with the arrow keys, then press the ENT (enter) key. The EXIT key erases the menus. Note: There is a mode that splits the screen in half, with the map on the left and the sonar on the right. This screen can be found in the Map/Map With Sonar page. When this screen is activated, you will have to specify which side the menu key corresponds to. To do this, press the PAGES key twice while the Map With Sonar screen is showing. The black bar at the top of the screen will begin flashing above either the map or the sonar. Use the arrow key to select the side that you wish to assign the MENU key to. Press the EXIT key when youre finished. To reassign the menu key, repeat the above steps.
SONAR OPTIONS Sensitivity The sensitivity controls the ability of the unit to pick up echoes. A low sensitivity level excludes much of the bottom information, fish signals, and other target information. High sensitivity levels let you see this detail, but it can also clutter the screen with many undesired signals. Typically, the best sensitivity level shows a good solid bottom signal with Grayline and some surface clutter. The sensitivity is adjusted to keep a solid bottom signal displayed, plus a little more when the unit is in the automatic mode. This gives it the capability to show fish and other detail. However, situations occur where it becomes necessary to increase or decrease the sensitivity. This typically happens when you wish to see more detail, so an increase in sensitivity is indicated. The procedure to adjust it is the same whether the unit is in the automatic or manual mode. To adjust the sensitivity, press the MENU key, then select Sensitivity. The screen at right appears. The sensitivity control has a vertical adjustment bar. The number at the bottom of the bar shows the percentage of sensitivity in use. To increase the sensitivity level, press the up arrow key. As you press the key, the control knob will move upward and the percentage will increase in value. You can also see the difference on the chart record as it scrolls. When the sensitivity is at the desired level, release the key. To decrease the sensitivity level, press the down arrow key. The control knob will move downward and the percentage will decrease. When the sensitivity is at the desired level, release the key. When you reach either the maximum or minimum limit, a tone sounds. To erase the menu, press the EXIT key. Automatic Sensitivity The unit can adjust the sensitivity for you. It bases the sensitivity level on water depth and conditions. To turn this on, press the MENU key, then

tom can be shown, which enlarges targets to best suit your fishing needs and water conditions. ZOOM Zooming the display is a common method used to enlarge small detail, fish signals, and the bottom with its asscociated structure. This unit lets you zoom the display quickly and easily by pressing the ZIN key. Pressing it once doubles the size (2X) of all echoes on the screen. Pressing it again quadruples the size of the echoes (4X). 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. For example, pressing the ZIN key once will enable a 2X zoom which will show all echoes that are 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 the ZOUT key to return the display to the normal mode. STOP CHART To temporarily stop the chart from scrolling, press the MENU key, then select Stop Chart from the menu and press the ENT key. Repeat these steps to start the chart again. CHART SPEED The rate that echoes scroll across the screen is called the chart speed. Its adjustable by pressing the MENU key, then selecting Chart Speed. A sliding knob adjustment appears on the screen. The default is maximum. Press the up or down arrow key to adjust the speed, then press the EXIT key to erase the menu. DEPTH CURSOR The depth cursor consists of a horizontal line with a digital depth box on the right side. The numbers inside the box show the depth of the cursor.
The cursor can be moved to any location on the screen, letting you pinpoint the depth of a target. To show the depth cursor, press the MENU key, then select Depth Cursor. Press the ENT key. The cursor appears at the top of the screen. Use the arrow keys to move the cursor to the desired depth. Erase the depth cursor by pressing the EXIT key. CHART DATA The digital information shown in the upper left corner of the display along with the zone alarm and zoom bar can be changed using the Chart Data menu. To use this menu, press the MENU key, select Chart Data Shown and press the ENT key. A screen similar to the one at right appears. The unit can show the digital depth in large numbers (default), small numbers, or off. To change it, select the Depth label, then press the ENT key. Highlight the desired setting using the arrow keys, then press the ENT key. To change any of the other settings, on this screen, select them using the arrow keys, then press the ENT key to select them. Press the EXIT key to erase the menu when youre finished. SONAR FEATURES Several key sonar options are under the Sonar Features menu on the main menu. Select the main menu by pressing the MENU key, then select Sonar Features and press the ENT key. The menu shown at right appears.
Transducer Frequency This unit operates from both 200 kHz and 50 kHz. The default frequency is 200 kHz. Its best for use in shallow water. The 50 kHz frequency is best for deep water, especially saltwater. Use the arrow keys to highlight the desired frequency, then press the ENT key to select it. Surface Clarity The markings extending downward from the zero line on the chart are called surface clutter. These markings are caused by wave action, boat wakes, temperature inversion, and more. The surface clarity control reduces or eliminates surface clutter signals from the display. It does this by changing the sensitivity of the receiver, decreasing it near the surface and gradually increasing it as the depth increases. The maximum depth that the surface clarity control can affect is 75% of the selected depth range. For example, on a 0 - 60 foot range with surface clarity control set to high, surface clutter will be reduced down to 45 feet. There are three levels of surface clarity available: low, medium, or high. It can also be turned off. The default level is low. To change it, highlight Surface Clarity on the Sonar Features menu, then press the ENT key to select it. Use the cursor keys to highlight the desired level of surface clarity, then press the ENT key. Noise Rejection The automatic noise rejection system built into this unit constantly evaluates the effects of boat speed, water conditions, and interference from electrical and mechanical sources such as bilge pumps, engine ignition systems and wiring, even engine vibration. It then works to reduce or eliminate the negative effects on the sonar screen. This gives the best display possible under most conditions. The Noise Rejection system is an effective tool in combating noise. In sonar terms, noise is any undesired marks on the display. This unit has two levels of noise rejection: normal and high. It can also be turned off. The default is normal. To change it, highlight Noise Rejection on the Sonar Features menu, then press the ENT key to select it. Use the cursor keys to highlight the desired level of noise rejection, then press the ENT key.

SONAR FEATURES (cont.) Fish Symbols The Fish Symbols feature identifies targets that meet certain conditions as fish. The microcomputer analyses all echoes and eliminates surface clutter, thermoclines, and other signals that are undesirable. In most instances, remaining targets are fish. The Fish Symbols feature displays symbols on the screen in place of the actual fish echoes. There are several fish symbol sizes. These are used to designate the relative size between targets. In other words, it displays a small fish symbol when it thinks a target is a small fish, a medium fish symbol on a larger target, etc. The microcomputer is sophisticated, but it can be fooled. It cant distinguish between fish and other suspended objects such as trotlines, turtles, submerged floats, air bubbles, etc. Individual tree limbs extending outwards from a group of limbs is the hardest object for the Fish Symbols feature to distinguish from fish. You may see Fish Symbols symbols on the screen when actually, there are no fish. Practice with the unit in both the Fish Symbols mode and without to become more familiar with the Fish Symbols feature. The default for Fish Symbols is off. To turn the Fish Symbols feature on, highlight Fish Symbols on the Sonar Features menu. Press the ENT key to turn the Fish Symbols feature on. Any targets the microcomputer determines are fish will be displayed as fish symbols. Fish Depths The Fish Depths 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 Symbols feature is on. The default for Fish Depths is off. To turn the this feature on, highlight Fish Depths on the Sonar Features menu. Press the ENT key to turn the Fish Depths feature on. (Note: If Fish Symbols is off, turning Fish Depths on will also turn Fish Symbols on.)
LOG SONAR CHART DATA If you have a MMC installed in the unit, the sonar data shown on the screen can be saved to the MMC. This can be played back at any time. To save the chart data, press the MENU key, then select Log Sonar Chart Data. The screen at right appears. To save data using the defaults on this screen, highlight Start Logging and press the ENT key. You can change any of the defaults on this screen, if desired. When finished, press the EXIT key.

speed sensor input - not the GPS. This distance (called Water Distance) can be reset to zero using the Reset Water Distance label on the Sonar Setup menu. Simply highlight Reset Water Distance and press the ENT key. The menus automatically erase and the water distance display is reset to 0.00. Sonar Simulator This unit has a built-in simulator that lets you use it as if you are on the water. All features and functions of the unit are useable. A message appears occasionally that alerts you to the fact that the simulator is on. To use this, select Sonar Simulator from the Sonar Setup menu. The screen at right appears. Turn the simulator on by highlighting Simulator On and pressing the ENT key. The simulator immediately begins operation. If you have a MMC installed, you can select previously saved charts to show instead of the standard one. Select the chart from the Charts Used menu. The unit will use the selected chart. When you are finished with the settings on this screen, press the EXIT key to erase the menus. SYSTEM SETUP Many of the units basic features can be changed from this menu. Press the MENU key twice, then select System Setup. The screen at right appears. Units of Measure This menu (shown at the top of the next page) sets the speed and distance (statute or nautical miles, meters), depth (feet, fathoms, or meters), temperature (degrees Fahrenheit or Celsius), and heading (true or magnetic) units.
To change the units, select Units of Measure from the System Setup menu. Highlight the desired label with the arrow keys, then press the ENT key to change it. Press the EXIT key when youre finished.
Set Local Time The GPS requires the local time and date for its initialization and the time and date are saved when a waypoint is saved. To set the time and date, select Set Local Time and Date from the System Setup menu. The screen shown at right appears. Highlight the field that you wish to change using the arrow keys, then press the ENT key to change it. Once you have each field set the way you want, press the EXIT key to erase the menu. Communications Ports This unit has two serial ports. Each can be set to send NMEA data or receive data from a DGPS receiver. The baud rate is adjustable from 1200 to 115200 baud. The default is 9600. To change a setting on this screen, highlight it using the cursor keys, then press the ENT key to change it. If a DGPS receiver is connect to this unit, highlight the appropriate receiver type: STARLINK DGPS or MAGNAVOX DGPS and press ENT key to turn it on. (Use Starlink DGPS when using Lowrance DGPS Beacon Receivers.) With the exception of serial communications, typically no other setup needs to be made with these receivers.

If you have any other Magnavox or Starlink compatible DGPS receiver connected to this unit, (including a Lowrance DGPS receiver) you may need to change the settings. To do this, select Configure DGPS Configure DGPS This unit will recognize Starlink and Magnavox automatic DGPS receivers. If you have either one of these receivers, select Configure DGPS. The screen at right appears. The status of the DGPS signal appears in the boxes at the top, along with the frequency and bit rate of the selected transmitter. To configure the unit for DGPS, highlight the Frequency and press the ENT key. Use the arrow keys to enter the frequency of the station that you intend to use. Press the ENT key when youre finished. Next, set the bit rate in the same manner. If youre using a Starlink DGPS receiver, leave the Starlink Auto Tuning Mode checked. If not, deselect this box. Press the EXIT key when youre finished with this menu. Configure NMEA You can configure the unit to use specific NMEA sentences. Select Configure NMEA and press the ENT key. The menu at right appears showing the prefix of the available NMEA sentences. A check mark next to the prefix means that prefix is in use. Select the prefix that you wish to change by highlighting it, then change it by pressing the ENT key. Press the EXIT key when youre finished with this menu. Reset Options To reset all features to their factory defaults, select Reset Options from the System Setup menu. After selecting, a new menu appears, asking if you want to reset all options. Use the arrow keys to highlight the answer, and the ENT key to select it. The unit clears all menus and returns all settings to the factory defaults.
Note: Reset Options does not erase any waypoints, routes, or plot trails. Popup Help Help is available for virtually all of the menu labels on this unit. By highlighting a menu item and leaving it highlighted for a few seconds, a popup message appears that describes the function of the the menu item. This feature is on by default. To turn it off, highlight Popup Help from the System Setup menu, then press the ENT key. To turn it on again, repeat the above steps. Hide GPS features If there is no GPS receiver attached to this unit, then the GPS menus and features can be hidden from view by selecting Hide GPS Features on the System Setup menu. The default is on. To turn them on again, select Show GPS Features from the System Setup menu. Software Information To view the version number of the operating system, select Software Information from the System Setup menu. A screen appears with the system information. Press the EXIT key to erase this screen. SUN/MOON CALCULATOR This unit has a sunrise/sunset and moonrise/moonset calculator that shows this information anywhere and anytime in the world. To use it, press the MENU key twice , then select Sun/Moon Calculator. The screen shown at right appears. The calculations for both are done at the same time. The sun and moon data for todays date appear above their respective symbols. The moon symbol shows the approximate phase of the moon. Todays date shows at the top of the screen. If you want to know the sunrise/sunset for a different date, change it by selecting the month, day, or year by pressing the ENT key, then enter the new date with the arrow keys. The unit recalculates the sun and moon data for the date you entered. The sun and moon data show for your present position. To choose a dif

When navigating to a waypoint, the Navigation screen looks like the one at right. Your ground speed, track, distance and bearing to waypoint, and course are all shown digitally on this screen. Closing speed is also known as velocity made good. Its the speed that youre making towards the waypoint. The current cross track error is shown in the Off Course box. This is 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 waypoint. Its shown on the steering screen as a vertical dotted line. Lines on either side of the present position show the current cross track error range The default for the cross track error range is 0.20 mile. For example, if the present position symbol touches the right cross track error line, then you are.20 mile to the right of the desired course. You need to steer left to return to the desired course. You can use the ZIN or ZOUT keys to change the cross track error range. A circle depicting your destination (waypoint) appears on the screen as you approach the waypoint as shown on the screen at right. Travel Time is the time that it will take to reach your destination at your present closing speed. Arrival Time is the local time that it will be when you arrive at the destination, based upon your present closing speed and track. Customizing the Navigation Screen Many of the digital displays can be customized to show different digital data than the defaults shown above. This is done exactly like the customization of the Status screen. See page 31 for instructions to customize this screen. Map There are five different mapping screens: Full Map, Digital Data, Two Position Formats, Two Maps, and Map with Sonar.
(Note: Maps must be downloaded from a MapCreate CD-ROM onto a MMC. The MMC must be installed into the unit before maps will show on the screen. If your unit came with a MMC, MMC Interface, and CD-ROM, then follow the instructions in the separate booklet. If these items were not included with your unit, then you will need to purchase the accessory pack that includes these items.) The maps on the CD have the majority of their detail in far southern Canada, the continental United States and Hawaiian islands, northern Mexico, the Bahamas, and Bermuda. The map screens show your course and track from a birds-eye view. If youre navigating to a waypoint, the map shows your starting location, present position, course line, and destination. You dont have to navigate to a waypoint, however, to use the map. Using the map is as simple as pressing the PAGES key, then Full Map. A screen similar to the one at right appears. The arrow flashing in the center of the screen is your present position. It points in the direction youre travelling. The solid line extending from the arrow is your plot trail, or path youve taken. The plotters range shows in the lower right corner of the screen. In this example, the plotters range is 4,000 miles from the left edge of the map to the right. To view the other map screens, press the PAGES key, highlight the MAP label, and press the down arrow key until the desired map screen appears. Press the EXIT key to erase the menu. The Digital Data screen has navigation data added to the left side, with the map on the right. The data includes ground speed, closing speed, distance to waypoint, distance off course (cross-track), track, bearing, course, and travel time.

appears with the icon placed at the cursor crosshairs. Press the EXIT key to erase the cursor. Icons can be erased from the plotter individually, all of a specific type, or all at once. To make changes to the icons, press the MENU key, then select Delete My Icons. The screen shown at right appears. The Delete All Icons selection erases all of the icons from memory. Use this only if you want to erase all icons that have been placed on all map screens. To erase only a certain type of icon, select the Delete By Symbol menu. The icon menu appears. Highlight the icon style that you want to erase from memory, then press the ENT key. The unit returns to the map screen with all of the selected icons erased. You can delete individual icons by selecting Delete From Map. Once this menu is selected, the unit returns to the mapping screen with the cursor activated as shown at right. Use the arrow keys to move the cursor to the icon that you want to erase. Once the crosshairs are on top of the icon, press the ENT key. The icon is immediately erased. Press the EXIT key to erase the cursor. PLOT TRAIL The line extending from the present position symbol is called a plot trail. (See the example at right.) You can save trails and navigate an existing trail by selecting the My Trails menu. Press the MENU key twice, then select My Trails. The screen at the top of the next page appears.

PLOT TRAIL

The list of saved trails shows on this screen. The check mark next to the trails name means that this trail is displayed on the map. An arrow on the right side of the screen points to the trail thats currently in use, next to the number of points in the trail. There can be up to 10 plot trails saved with up to 10,000 points per trail. Edit Trail To change the settings for an existing trail, highlight the Saved Trails menu and press the ENT key. Next, highlight the trail that you wish to change from the list, and press the ENT key. The Edit Trail menu appears. From this menu, the trails name and number of points used can be changed by selecting them with the arrow keys and the ENT key. If the Active box is selected, then the points are updated on this trail. If Visible is selected, then the trail shows on the map. Select Delete Trail to erase the trail and its settings.
Navigate a Trail You can follow a saved trail by using the Navigate feature on the Edit Trail menu (shown above). Selecting the Navigate button brings up the screen at right. The unit drops a point on the trail as you travel. You can navigate from one end of the trail to the other. The points on the trail selected in the box at the top of the screen are shown in the list. The default data for each point in the plot trail is distance and bearing from your present position to each point on the trail.
You can change this to the distance and bearing from one point to the next (leg), travel time to each point, or arrival time for each point. To change this data, select Display Data, then press the ENT key. Select the desired data from the list and press the EXIT key. If you select the Navigate button, the unit will return to the mapping screen showing navigation data to the first point on the list. Selecting Reverse before navigating inverts the list of points so that the last point on the list is the first one that will be navigated to. For example, we ran a course on a local lake, (shown at right) from the boat ramp to a small cove. To navigate back to the boat ramp using the plot trail, press the Menu key twice, select My Trails then select the desired plot trail and click on the Naviate button. The screen shown a the bottom of the previous page appears. Point 1 on the list is the boat ramp. Click on the Reverse button to reverse the plot trail as shown at right. Now the last point on the plot trail (#11) will be the first one that the unit navigates to. Now select the Navigate button. The unit returns to the map screen as shown at the bottom of this page. As you travel, the unit will show navigation data to each point on the plot trail. When you cross the arrival alarm radius (default is 0.1 mile), the arrival alarm sounds an alert. Pressing the Exit key clears the arrival alarm for that point. The unit will continue to show navigation data to each point on the trail until you reach the destination.

Average Position This feature averages your position. This helps to eliminate errors in the position due to atmospheric effects and other conditions. When the Average Position menu item is selected, a screen similar to the one at right appears. The small plotter screen shows your present position. The number of positions used to calculate the average position shows on the right side of the screen, beneath your present position. When you are ready to save the position, press the ENT key. This brings up the Edit Waypoint menu, as shown at the bottom of the page 42. You can name the waypoint, choose a symbol to mark the waypoint on the map, and use your current position shown in the latitude/longitude boxes or change it to a different one. Use the cursor keys to highlight the section that you wish to change and press the ENT key to select it. When all the data is correct on this menu, press the EXIT key. This saves the waypoint and opens the Waypoint Information screen as shown at the top of this page. This shows the waypoint that you just saved. If all you wanted was to save the waypoint, press the EXIT key to erase the menu. See the next page for more information on the Waypoint Information menu. Waypoint Information This screen shows the currently selected waypoint and its name, latitude/longitude, the local time and date that it was saved, and the distance and bearing from your present position to the waypoint. To navigate to a waypoint, select Go To Waypoint. The unit will instantly show navigation data to the selected waypoint. Find On Map returns the unit to a map display with the selected waypoint and the cursor centered on the map. Pressing the EXIT key returns the unit to the Waypoint Information menu.
Edit Waypoint returns the unit to the Edit Waypoint menu described on page 46. Delete Waypoint removes the waypoint from the list. WAYPOINT NAVIGATION This unit makes it easy to navigate to any waypoint. All you have to do is press the WPT key, select the waypoint, then select Go To Waypoint on the Waypoint Information menu. The unit immediately shows navigation information to the waypoint on all navigation and mapping screens. In this example, the waypoint named Big Fish was recalled. Switching to the MAP-1 screen (shown at right) shows the starting location S, the recalled waypoint Big Fish, the plot trail from the starting location to the present position, and the present position. The present position arrow also shows the direction of travel (track). Navigating to a Cursor Position This unit lets you navigate to a location without storing it in the waypoint database by using the map and cursor. To do this, first switch to a map. Now move the cursor to the location that you want to navigate to. Next, press the MENU key. A new, highlighted menu appears on the list: Go To Cursor. Press the ENT key. The unit returns to the map and shows navigation data to the cursor location (shown as D on the map). Navigating to a Waypoint using the Map The unique birds-eye view used by the map gives you an easy way to navigate to a waypoint. On the map screen shown at right, the arrow is your present position.

The box with the S in it was your starting location when the waypoint was recalled. The dotted line is called a course line and is the shortest path from the starting location to the destination. The D is the cursor destination, when the cursor position is used as a destination. If you follow the course line, youll reach the destination, covering the shortest distance in the least time. CAUTION! This product does NOT take land features or any other feature into account when it projects the course line on the screen. Use caution when navigating to a location. Make certain there are no obstructions in your path. MAN OVERBOARD One of boatings 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. Its particularly dangerous at night or if youre out of sight of land. Of course, the first thing to do is remain calm and try all standard safety measures to try and rescue the person. This unit has a man overboard feature that shows navigation data to the location you were in when 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. A screen similar to the one at right appears. The steering screen shows a graphical view of your position (shown by the black arrow in the center of the compass rose) and the position of the man overboard (shown by the small circle). The man overboard position is also stored in the waypoint table for future reference. It can be edited the same as any waypoint. This prevents the inadvertent loss of the current Man Overboard position.
The Man Overboard symbol is also placed on the map screen in the appropriate location. You can use the map screen to navigate to the Man Overboard location, if you so desire. To stop the unit from showing navigation to the man overboard position, see the Cancel Navigation section below. Remember, saving the victim is the primary goal. Try all options to rescue the person immediately after the accident happens. Training and education are also good accident preventatives. The Coast Guard has excellent safety courses. Instruct all members on board your boat on safety procedures before leaving the dock. Make certain all on board know what to do before an emergency occurs. CANCEL NAVIGATION This unit continues to navigate to a recalled waypoint, the last waypoint in a route, a man overboard position, or the cursor position until you stop it. To stop the navigation function, press the MENU key twice, then select Cancel Navigation. The unit stops showing navigation information. ROUTES You can connect several waypoints together to form a route. When you recall the route, the unit shows navigation information to the first waypoint in the route, then when you reach that waypoint, it switches to the next waypoint, and so on until you reach the last waypoint in the route.

measure up four inches and to the left a half-inch from the reference point on the map to find your location. To use this format, you need to follow these steps in order. First, take your map of the area and determine a reference latitude/longitude. (Note: in order for this system to work, the latitude/longitude lines must be parallel with the edge of the map. USGS maps are parallel, others may not be. Also, this works better with smaller scale maps.) The reference position can be anywhere on the map, but the closer it is to your location, the smaller the numbers will be that youll have to deal with. Once youve decided on a reference position, you can save it as a waypoint. See the waypoint section for information on saving a waypoint. Save the reference position as a waypoint. Exit from the waypoint screens. Now select Configure Map Fix from the Coordinate System menu. The screen at right appears. Map Scale is highlighted. Press the right arrow key. Enter the maps scale. This is generally at the bottom of the paper map. Its shown as a ratio, for example 1:24000. The unit returns to the Configure Map Fix screen. Now select Select Origin Waypoint if you saved the reference point as a waypoint or highlight the Latitude or Longitude under the Origin and enter the reference position. If you used Select Origin Waypoint, then select the waypoint that you saved the reference point under. The unit returns to the Configure Map Fix menu. Finally, press the EXIT key to erase this menu. Now select "Map Fix from the list and press the ENT key. All position information now shows as a distance from the reference point you chose. Datum Maps and charts are based on a survey of the area thats covered by the map or chart. These surveys are called Datums. Maps that are created using different datums will show the same latitude/longitude in slightly different locations. All datums are named. The GPS system is based on the WGS-84 datum, which covers the entire world. Other datums may also cover the entire
world, or just a small portion. By default, your position shows using the WGS-84 datum. However, it can show your position using one of 191 different datums. To change the datum, first press the MENU key, then highlight the GPS Setup label and press the ENT key. Now highlight the Map Datum label. Finally, press the ENT key again. A screen similar to the one at right appears. The WGS-84 - Default label is highlighted. To change it, simply press the up or down arrow keys to highlight the desired datum, then press the ENT key. This selects the datum and erases the select datum menu. A list of the datums used by this unit is in the back of this manual. Position Pinning When using a GPS receiver at extremely low speeds, it can have trouble determining your course over ground, or direction youre travelling. If youre using this receiver without DGPS and stop, the position pinning feature locks the present position indicator on the plotter until youve moved a short distance or exceed a very slow speed. This prevents the wandering plot trail seen when youre stopped with position pinning turned off. This also affects the navigational displays. The easiest way to see the wandering is to stand still with the GPS receiver turned on and watch your plot trail with position pinning turned off. Youll see the present position change, speed increase and decrease, and a random plot trail on the plotters screen. If you wish to turn the position pinning feature off, press the MENU key, then highlight the GPS Setup label and press the right arrow key. Now highlight the Position Pinning label. Finally, press the ENT key. Reverse the above steps to turn it on again.

3. The water may be deeper than the sonars ability to find the bottom. If the sonar cant find the bottom signal while its in the automatic mode, the digital 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 units 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 boats 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 units power and transducer cables away from other electrical wiring on the boat. No fish arches when the Fish ID feature is off: 1. Make certain 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 fishs 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.

Luzon Philipines (Excluding Mindanao) Luzon Philipines (Mindanao) Mahe 1971 Mahe Island Massawa Ethiopia (Eritrea) Merchich Morocco Midway Astro 1961 Midway Islands Minna Cameroon Minna Nigeria Montserrat Island Astro 1958 Montserrat (Leeward Islands) MPoraloko Gabon Nahrwan Oman (Masirah Island) Nahrwan Saudi Arabia Nahrwan United Arab Emirates Naparima BWI Trinidad & Tobago North American 1927 Mean for Antigua, Barbados, Barbuda, Caicos Islands, Cuba, Dominican Republic, Grand Cayman, Jamaica, Turks Islands North American 1927 Mean for Belize, Costa Rica, El Salvador, Guatmala, Honduras, Nicaragua North American 1927 Mean for Canada North American 1927 Mean for CONUS (Continental United States) North American 1927 Mean for CONUS (East of Mississippi River) including Louisiana, Missouri, Minnesota North American 1927 Mean for CONUS (West of Mississippi River) North American 1927 Alaska North American 1927 Bahamas (Except San Salvador Island) North American 1927 Bahamas (San Salvador Island) North American 1927 Canada (Alberta, British Columbia) North American 1927 Canada (Manitoba, Ontario) North American 1927 Canada (New Brunswick, Newfoundland, Nova Scotia, Quebec) North American 1927 Canada (Northwest Territories, Saskatchewan) North American 1927 Canada (Yukon) North American 1927 Canal Zone North American 1927 Cuba North American 1927 Greenland (Hayes Peninsula) North American 1927 Mexico North American 1983 Alaska, Canada, CONUS North American 1983 Central America, Mexico Observaorio Metereo 1939 Azores (Corvo & Flores Islands) Old Egyptian 1907 Egypt Old Hawaiian Mean for Hawaii, Kauai, Maui, Oahu Old Hawaiian Hawaii Old Hawaiian Kauai Old Hawaiian Maui Old Hawaiian Oahu Oman Oman Ordinance Survey Great Britain 1936 - Mean for England, Isle of Man, Scotland, Shetland Islands, Wales Ordinance Survey Great Britian 1936 - England Ordinance Survey Great Britian 1936 - England, Isle of Man, Wales Ordinance Survey Great Britian 1936 - Scotland, Shetland Islands Ordinance Survey Great Britian 1936 - Wales Pico de las Nieves Canary Islands Pitcairn astro 1967 Pitcairn Island Point 58 Sweden Santo (DOS) 1965 Espirito Santo Island Sao Braz Azores (Sao Miguel, Santa Maria Islands) Sapper Hill 1943 East Falkland Island Schwarzeck Nambia Selvagem Grande Salvage Islands SGS 85 Soviet Geodetic System 1985 South American 1969 Mean for Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Trinidad & Tobago, Venezuela South American 1969 Argentina South American 1969 Bolivia South American 1969 Brazil South American 1969 Chile South American 1969 Colombia South American 1969 Ecuador