Map Page The Map Page shows your progress on a moving track plotter and gives you a birds-eye-view of surrounding waypoints.
Highway Page With the Highway Page, you will get graphic steering guidance when navigating a route or going to a single waypoint.

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GETTING STARTED
Getting Started Tour Now that you are familiar with the primary pages, its time to take a tour. This is a live tour and is to be conducted with your unit installed and with the boat in the water. The tour will take you through the receivers basic features and functions as you move about on the water and assumes that the GPS 126/128 is turned on and initialized, (see page 52 for initialization procedure) and that you have not changed any of the factory settings (units of measure, selectable fields, etc.). If these settings have been changed, the pictures and descriptions in this manual may not match what you see on your screen. Navigation Simulator If you are not able to take the Getting Started Tour with your boat in the water, you may use the built-in navigation simulator to practice using the GPS 126/128. To use the simulator, see page 51. Marking a Position To begin the tour, lets take the position you have acquired (either by just initializing the unit or by having turned the unit on) and mark it as a waypoint for future reference.
1. Press the M key to capture and hold your position.
Power On & Marking a Position
The Welcome Page will be shown while the unit conducts a self test.
To mark a position, you must have obtained a 2D or 3D fix, or have the receiver in simulator mode. If you try to mark a position without a position fix, you will be alerted with a No GPS Position message.
Press the UP arrow to move forward through the alphabet or numbers and the DOWN arrow to move backward.
The mark position page will appear, showing the captured position and a default 3-digit waypoint name. Lets change the default name to something a little more meaningful, like DOCK.
2. Press the down arrow once to move the field highlight from the SAVE? field to the name field.

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3. Press F to clear the default waypoint name. 4. Press and hold theU key to scroll through the alphabet until the letter D appears. 5. Press the R key once to move the character highlight to the next character space. 6. Repeat steps 3 and 4 until the word DOCK is displayed. 7. Press F to complete entry of the name.

Position and Map Pages

Each waypoint may also be assigned a custom waypoint symbol for easy waypoint recognition on the map page.
1. Press F to activate the symbol menu. 2. Select the anchor symbol and press F. 3. Press the D key to highlight the DONE? field. 4. Press F to confirm the selected symbol. 5. With the SAVE? field highlighted, press F to confirm that you want to save the position as a waypoint named DOCK.
The arrow keypad is used for all data entry. Use the UP and DOWN keys to select letters, numbers, or menu options, and use the LEFT and RIGHT keys to move the cursor forward or backward along the line.
The mark position page will now be replaced by the Position Page (or whatever page was displayed prior to pressing the M key). The DOCK waypoint is now stored in the GPS 126/128s memory, and will remain there until you manually remove it or clear the receivers memory. For more on waypoint management, see pages 19-24. Using the Position and Map Pages Now that youve marked a position, lets see how the Position and Map Pages can be used to monitor your progress as you head out into the open water.
As always, ensure your primary focus is on boating traffic and monitor the GPS126/128 briefly when operating your boat.

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Using the Position and Map Pages (cont.) As you head out, the Position Page will help you monitor your movement.
Graphic Compass Tape Current Speed UserSelectable Field 12/24 Hour Time
Track Over Ground UserSelectable Field Position Display
The Map Page displays your present position as a diamond icon and provides a real-time graphic breadcrumb display of your track right on the screen.
The direction you are moving (your track) and your speed are displayed on the upper part of the page, just below the graphic compass tape. The latitude and longitude, along with two user-selectable displays, are continuously displayed in the middle of the page, and the time of day is displayed below. Now lets change the display to the Map Page and watch the track log of our tour:
1. Press the J key to change from the Position Page to the Map Page.
To view a larger area on the Map Page, lets change the zoom scale from.2 (default) to 1.0 nautical mile.
To select a larger zoom scale on the Map Page:
1. Press the H key until 1.0 n.m. zoom scale appears.
The moving maps default screen orientation is trackup. Track up means that your current direction of travel is always up (or towards the top of) the screen. It can also be set for north up, or desired trackup orientation through the map setup page.

To select the Compass Page:
1. While viewing the Highway Page, press F twice.
GOTO Waypoint & Cancelling GOTO
The 126/128 will also provide steering guidance with a graphic Compass Page. To change the display from the Highway Page, press ENTER twice.
The Compass Page will now become the displayed navigation page. This page provides a directional pointer to your destination by using a rotating compass display to show direction of travel. It provides better steering guidance at slower speeds for travel with many directional changes.
Once you reach the selected distance from the destination (based on your present speed and course), an arrival message will appear on the message page.
To switch back to the Highway Page, press ENTER twice. Cancelling a GOTO If you decide to stop navigating to the active waypoint, all you have to do is cancel the GOTO.
To cancel an active GOTO:

1. Press the G key.

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2. Use the arrow keypad to move the field highlight to the CANCEL GOTO? prompt at the bottom of the page and press F.
Clearing a Cluttered Map Display After youve used the GPS 126/128 for a few trips, you may find that your map display has become a bit messy from keeping track of your every move. For practice, lets clean up the screen by clearing the track log (the plot points left on the Map Page) weve just created during the Getting Started Tour.
1. Press J or Q until the Map Page appears and press F. 2. Use theD key to move the field highlight to the TRACK SETUP option. 3. Press F to access the track setup page. 4. Highlight the CLEAR LOG? option. The clear log confirmation page will appear. 5. Use the L key to highlight the Yes prompt. 6. Press F to finish.
Clearing the Map, Adjusting Contrast, & Power Off
Adjusting the Contrast You can adjust the screen contrast from the Satellite Page and also from the Menu Page (see page 47)
To adjust the contrast from the Satellite Page:
1. Press the J or Q key until the Satellite Page appears. 2. Press the arrow keypad left or right until the desired level is reached, and press F.

To create a waypoint by entering coordinates:
1. From the waypoint definition page, highlight NEW?, and press F. 2. Enter a waypoint name, and press F. 3. Press F to select a waypoint symbol, make your selection, and press F. 4. Highlight the DONE? prompt, and press F to return to the waypoint page. 5. Highlight the position field, and press F. 6. Enter your position, and press F. 7. Highlight the DONE? prompt and press F to confirm.
Reference Waypoints To create a new waypoint manually without knowing its position coordinates, youll need to enter its bearing and distance from an existing waypoint or your present position.
To create a new waypoint by referencing a stored waypoint:
1. From the waypoint definition page, highlight NEW?, and press F.

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Reference Waypoints (cont.)
2. Enter a waypoint name, and press F. 3. Highlight the reference field, and press F. 4. Enter a reference waypoint name (or leave the field blank to use your present position), and press F. 5. Enter the bearing and distance of your new waypoint from the reference waypoint. 6. Press F to confirm the DONE? prompt.
Waypoint Symbols & Comments
Waypoint Symbols The GPS 126/128 allows you to select one of 16 symbols for each waypoint for easy recognition on the map display. From the symbol page, you may also select how the waypoint appears on the map.
To select a waypoint symbol:
1. Highlight the symbol field, and press F. 2. Use the arrow keypad to select the desired symbol, and press F. 3. The cursor will move to the display field, where you can select how the waypoint information will be displayed on the map. 4. Press F, and select one of the following display options: name with symbol, symbol only, or comment with symbol. 5. Press F to confirm your selection, and F again to confirm the Done? prompt. Waypoint symbols enable you to instantly get more information about a waypoint than just its name.
Waypoint Comments Each waypoint stored in the GPS 126/128 has a user-defined 16-character comment field. The default comment is the UTC (or Greenwich mean time) date and time of the waypoints creation.

To change or add a comment:
1. Highlight the comment field. 2. Press F. The waypoint comment field will automatically assign the date and time of creation to the waypoint comments field. You may enter a 16-character user comment at any time.
Note: You can clear the comment field by pressing the left side of the rocker keypad.
3. Enter the desired comment. 4. Press F.

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Rename, Delete & Scan Waypoints
Renaming and Deleting Waypoints The rename and delete function fields are located along the bottom of the waypoint definition page.
To rename a stored waypoint:
1. Highlight RENAME?, and press F. 2. Enter the new waypoint name , and press F. 3. Press F to confirm the Yes? prompt.
To delete a stored waypoint:
1. Highlight DELETE?, and press F. 2. Highlight the Yes prompt, and press F.
Note: To delete a waypoint thats part of a route, first remove the waypoint from the route (see pg. 34), and then delete it. If you attempt to delete a waypoint thats part of a route, youll be given a Route Waypoint Cant be Deleted message.
You may wish to quickly save waypoints by pressing MARK and then ENTER, thus assigning a default name. You may then rename the waypoint at a later date. Any waypoint may be renamed at any time.
Scanning Waypoints As you manually enter a waypoints name, the GPS 126/128s waypoint scanning feature will automatically display the first numerical or alphabetical match of the character you have entered. If you have more than one waypoint that begins with the same letter or number, move to the next character postion and continue entering the waypoint name. This helps eliminate the need to always enter a waypoints complete name.
To scan waypoints from a waypoint field:
1. Highlight the waypoint name field, and press F. 2. Press the left side of the keypad to clear the name field. 3. Scroll through the waypoints. 4. When you find the desired waypoint, press F.
Scanning waypoints from the waypoint definition page is quick and easy. Simply highlight the name, press ENTER, and use the arrow keypad to scroll through the names.

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Selecting a GOTO Destination The GPS 126/128 provides four ways to navigate to a destination: GOTO, MOB, TracBack, and route navigation. The most basic method of selecting a destination is the GOTO function, which lets you choose any stored waypoint as the destination and quickly sets a direct course from your present position.
To activate the GOTO function:
1. Press G. 2. Select the waypoint you want to navigate to, and press F.
Select a GOTO & MOB Function
Once a GOTO waypoint has been activated, the Compass Page or Highway Page will provide steering guidance to the destination until either the GOTO is cancelled or the unit has resumed navigating the active route (see pg 30).

To activate a route in inverted order:
1. Follow the steps above, but select INV?, and press F.

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Active Route Page Once a route has been activated, the active route page will display the waypoint sequence of your route with the estimated time enroute (ETE) at your present speed and the distance to each waypoint. As long as you are navigating an active route, the active route page will become part of the main page sequence of the unit. The active route page will also allow you to change the ete field to display desired track (DTK) or estimated time of arrival (ETA) for each leg. You can also clear or invert the active route.
To display DTK or ETA for each leg:
1. Highlight ETE or DTK, and press F. 2. Select DTK or ETA, and press F.
Active Route, Copying, & Clearing
The active route page also allows you to clear (stop navigating) or invert the active route without using the route definition page.
To invert a route from the active route page:
1. Highlight INVERT?, and press F. Active Route Page Whenever you have an active route, the active route page will appear in the main page sequence after the Compass or Highway Page.
To stop route navigation:
1. Select CLEAR?, and press F.
Copying and Clearing Routes The route definition page is also used to copy a route to another route number. This feature is useful when you make changes to the active (or TracBack) route and want to save the route in its modified form for future use.

To copy a route:

1. Highlight the route number field, and press F. 2. Select the route number to be copied, and press F. 3. Highlight the copy to field, and press F. 4. Scroll through the available routes and select a destination route number. (Only open routes will be available.) Press F to copy the route.
To clear a route from memory:
1. Highlight the route number field, and press F. 2. Enter the route number, and press F. 3. Select CLR?, and press F. 4. Highlight Yes?, and press F.
To copy a route, select an open storage route and press the ENTER key. If you select a route that is already used, youll be alerted with a Route Full message.

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Editing Routes & On-Route GOTOs
Editing Routes A route can be edited anytime after its creation. To edit a route from the active route page or the route definition page:
1. Select the waypoint you want to edit, and press F.
An on-screen menu of editing choices will appear, with options for reviewing, inserting, deleting, or changing the waypoint field highlighted. This field contains the following options:
Use the on-screen menu to select the desired editing function.
Review? reviews the waypoints definition page Insert? adds a new waypoint that precedes the selected waypoint Remove? deletes a selected waypoint Change? replaces the selected waypoint with a new waypoint You may delete a waypoint from a route, but only if the route is not active. Note: Editing the original storage route will not affect route 0. If you want to save an edited version of route 0, save it to an open storage route. On-Route GOTO At the beginning of this section, we mentioned that the GPS 126/128 will automatically select the route leg closest to your position as the active leg. This may mean that you are not navigating to the first waypoint in the active route. If you want to select a route waypoint with which to begin navigation or you prefer to navigate a route out of sequence, you can perform an on-route GOTO from the active route page.

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Using the Highway Page
Bearing to Waypoint Track Over Ground Destination Waypoint Graphic Highway Distance to Waypoint Speed Over Ground CDI Scale

Pointer

User Selectable Fields
The GPS 126/128s Highway Page provides graphic steering guidance to a destination waypoint, with a greater emphasis on the straight-line desired course and the distance and direction you are off course. The bearing and distance to a waypointalong with your current track and speedare displayed at the top of the screen. The middle of the screen provides visual guidance to your waypoint on a moving graphic highway. Your present position is represented by the diamond in the center of the CDI scale. The line down the middle of the highway represents your desired track. As you navigate toward a waypoint, the highway will actually moveindicating the direction youre off courserelative to the position diamond on the CDI scale. When the highway is pointing straight up the screen, the waypoint is directly ahead. If the destination waypoint is to the left, the top of the highway will lead to the left, and vice versa. To stay on course, simply steer in the direction the highway leads (left or right) until the highway leads straight up the page. Below the graphic highway is the pointer. The pointer shows the direction of the waypoint relative to the direction you are moving. Below the pointer are two user-selectable fields. If you do get off the desired course by more than 1/5th of the selected CDI range, the exact distance you are off course will be displayed where the CDI scale setting normally appears. If you get too far off course (the highway has disappeared), a message box will appear to indicate what course to steer to get back on course. (For information on setting this scale, see pg. 48.) When the distance reading reaches 0, youve reached your destination.
In this example, the Highway Page indicates that you are off course to the left. Steer right to get back on course. Notice the highway always shows the direction to turn. If the highway leads straight up the page, you should continue in your current direction.
If you get too far off course, a message box will appear to indicate what course to steer to get back on course most efficiently.

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Using the Compass Page
Bearing to Waypoint Track Over Ground Compass Ring UserSelectable Field Distance to Waypoint Speed Destination Waypoint Pointer to Waypoint User-Selectable Field

Compass Pages

In this example, the compass page indicates that you are traveling in a northerly (334 degrees) direction and the destination waypoint is north (358 degrees) of your current direction of travel.
In this example, the compass page indicates that you are traveling in a northerly (020 degrees) direction and the destination waypoint is west (357 degrees) of your current direction of travel.
The Compass Page provides better steering guidance for travel at slow speeds (e.g., walking) and for travel with many directional changes. At the top of the page, the bearing (BRG) and distance (DST) to the waypoint are displayed. The distance displayed is the straight-line distance from your present position to the destination waypoint. The bearing indicates the exact compass heading from you to the destination. Below the bearing and distance, track (TRK) and speed (SPD) are displayed. The track is your course over ground and the speed is your speed over ground. The middle of the page features a rotating compass ring that shows your course over ground while you are moving, with a pointer arrow to the destination displayed in the center. The arrow shows the direction of your destination waypoint, relative to the direction you are moving. For instance, if the arrow points up, you are going directly to the waypoint. If the arrow points any direction (left, right, down, etc.), turn toward the arrow until it points up and then continue in that direction. The bottom of the page shows two user-selectable fields for ETE, ETA, CTS, XTK, VMG, or TRN. When you are one minute away from your destination (based on your current speed and track over ground), the GPS 126/128 will alert you with a flashing on-screen message box.

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Map Page The GPS 126/128 features a powerful real-time moving map that does much more than just plot your course and route. The Map Page also provides you with a target cursor that will let you pan ahead to nearby waypoints, determine the distance and bearing to any map position, and mark new waypoints while you navigate.
Bearing to Waypoint Distance to Waypoint

Map Page

Present Position Track Over Ground Speed Over Ground
The map contains 12 selectable range scales from 0.2 to 320 miles (0.5 to 600 km). The scale represents the distance shown from the top of the screen to the bottom. Move from scale to scale by using the dedicated zoom keys (IN and OUT). Pressing IN decreases the scale and pressing OUT increases the scale. A diamond icon in the center of the page represents your present position, with your track and/or route displayed as a solid line. Nearby waypoints are shown with the corresponding name listed. You may select which items are shown through the map setup submenu page (see pages 40-41 for more information). The four corners of the Map Page are used to display various navigation data, including the bearing and distance to a destination waypoint and your current track and speed over the ground. The two fields at the top corners of the map show your bearing and distance to one of three selectable destinations: an active destination waypoint; a highlighted on-screen waypoint; or the panning target crosshair. If you are not navigating to a waypoint or using the panning function, the top data fields will not be displayed. The bottom corners of the display always show your current track and speed.

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Menu Page The GPS 126/128s Menu Page provides access to additional pages (submenus) that are used to select and customize operation and navigation setup. These eight pages are divided into categories by function. Weve already gone over the waypoint and route management pages in their respective sections. Lets review the rest of these pages as they appear on the Menu Page.
To select a submenu page from the Menu Page:
1. Highlight the page, and press F. 2. To return to the Menu Page, press Q.
Menu Page & Distance/Sun Calculation
Distance and Sun Calculations The distance and sun calculation page will give you the distance and bearing between any two waypoints or between your present position and a waypoint. It will also calculate the sunrise and sunset (in local time) for a particular date at either your present position or any stored waypoint.
To perform a distance and sun calculation:
1. Highlight the from field and press F. Enter the desired waypoint, and press F. 2. Highlight the to field and press F. Enter the destination waypoint, and press F. 3. The date field will become highlighted. Press F to enter the date youll arrive at your destination, and press F.
The Menu Page allows you access to a variety of waypoint, route, system and setup features.
If you havent marked your present position as a waypoint or you leave the to field blank, the sunrise and sunset at your present position will be shown. Message Page The message page is used to display all messages in the GPS 126/128. There are two types of messages: temporary alerts (e.g., approaching a waypoint) and condition alerts (e.g., WPT memory is full). All messages are indicated by a flashing on-screen box. After a temporary alert has been viewed, it is cleared. Condition alerts are displayed on the message page until the condition has been resolved.
To view the message page:
1. Highlight the MESSAGES field and press F. The GPS 126/128 will calculate the sunrise and sunset times of any stored waypoint or your present position. To calculate, enter the date and year and press ENTER.
See Appendix C for a complete list of messages.

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Interface Setup & DGPS
Interface Setup The GPS 126/128s interface page lets you specify the formats for connecting external devices. There are six options: GRMN/GRMN, None/None, RTCM/None, RTCM/NMEA, NMEA/NMEA, and None/NMEA. Each option lists the input format first, followed by the output format. To select I/O format:

CDI Scale Settings The course deviation indicator (CDI) field lets you select the +/- range of the CDI bar scale on the Highway Page. Three scales are available: +/- 0.25 (default), 1.25, and 5.0 miles or kilometers. Note: This CDI value represents the full deflection of scale to either side. To enter a CDI scale setting:
1. Highlight the cdi scale field, and press F. 2. Select the desired setting, and press F.
Units of Measure The GPS 126/128 lets you select statute (default), nautical, or metric units of measure for all speed and distance fields.

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To change the unit of measure:
1. Highlight the units field, and press F. 2. Select the desired unit of measure, and press F.
Speed Filter The speed filter allows you to determine how the GPS 126/128 responds to changes in track or ground speed. Three settings are available: automatic, on, or off. The Auto setting is the default and will monitor changes in your current track and speed and adjust the receivers response time automatically. The On setting allows you to manually enter a response time up to 300 seconds. Selecting a higher setting may be desirable in slow-speed applications with frequent changes in track.
To enter a value for the speed filter:
1. Highlight the SPEED FILTER field and press F. 2. Select the ON option and press F. 3. Highlight the speed value field and press the F key. 4. Use U and D to select the desired number of seconds. 5. Press the F key to confirm the selection.
Speed Filter and Magnetic Heading
The number entered represents a window of time the GPS 126/128 considers in adjusting to changes in speed and track. For example, if 12 seconds is entered, the speed displayed will constantly represent the speed averaged over the last 12 seconds.
Magnetic Heading Reference The GPS 126/128s heading information can be displayed referencing magnetic north (automatic or userdefined), true north, or calculated grid headings. The default setting is automatic magnetic north, which is suitable for most applications. To select a heading reference:
1. Highlight the heading field, and press F. 2. Select the desired heading preference, and press F.
To enter a user-defined magnetic heading:
. 1. Select User Mag and press F. 2. Press F, enter the degrees and direction of magnetic variation, then press F.
To enter a user-defined magnetic variation, select the User Mag option and enter the desired direction and value.

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Alarms Setup The alarms setup page is used to set the three alarms available on the GPS 126/128: the anchor drag alarm, arrival alarm, and CDI alarm. The anchor drag alarm will sound if your boat has moved outside a range measured from a central point (your position). The arrival alarm sounds when you are approaching a waypoint and have reached the user defined distance. The CDI alarm will alert you when your track varies from the shortest distance to a waypoint by the defined range. The arrival and CDI alarms may be set from 0.0 to 9.9 units. The anchor drag alarm may be set up to 9.99 distance units.

To set the alarms:

Alarms Setup
When activated, the arrival alarm will sound when you reach the specified distance from your destination waypoint.
1. Move the highlight to ALARMS SETUP and press F. 2. Select the desired alarm distance field and press F. 3. Enter the distance for the alarm and press F. 4. If you would like to change the On/Off setting, press the F key and use the U and D keys to turn the alarm on or off. 5. Enter a setting and press the F key.
When setting the anchor drag alarm, remember that Selective Availability can degrade your GPS position as much as 100 meters and may cause false anchor drag alerts.
Use the CDI alarm to ensure you maintain a straight-line course to the destination waypoint.

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Navigation Simulator The GPS 126/128s simulator mode lets you practice all aspects of its operation without active satellite acquisition. You can plan and practice trips, enter new waypoints and routes, and save them for use during normal operation. To activate the simulator:
1. From the Menu Page, highlight SYSTEM SETUP, and press F. 2. Highlight the mode field, and press F. 3. Select Simulator?, and press F.

Navigation Simulator

Once the simulator mode has been activated, use the Position, Compass, or Highway Page to set your speed and track by highlighting the appropriate field, entering the desired value, and pressing F. You may also enter a new position if you desire (from the Position Page).
The GPS 126/128 does not track satellites in simulator mode. Although you can create and save waypoints and routes while using the simulator mode, never attempt to use the simulator mode for actual navigation.
Select the simulator mode from the operation mode choices and press ENTER. You may return to normal operation by changing the operation mode or by turning the unit off.

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APPENDIX A

Initialization

Initializing for First-Time Use The GPS 126/128 typically acquires a position so fast that initialization is automatic. However, initialization will be necessary for the following: After memory loss When the receiver has been moved more than 500 miles with the power off Additionally, it may be necessary to initialize the unit the first time you use it, if it does not acquire a fix in a few minutes. The receiver is shipped from the factory in AutoLocate mode, which enables the GPS 126/128 to determine its location anywhere in the world. To speed up the initialization process, we recommend using the graphic initialization described below.
To turn the GPS 126/128 on:
1. Press and hold P until the receiver turns on.

Welcome Page

The welcome page will be displayed while the unit conducts a self test. Once testing is complete, the welcome page will be replaced by the Satellite Page, with the EZinit prompt ready for you to select one of two initialization methods: Select Countryallows you to initialize the receiver by selecting your present position from a list of countries in the GPS 126/128s internal database. This may speed up the initialization process. AutolocateTM allows the GPS 126/128 to initialize itself and calculate a position fix without knowing your present position. This usually provides a position fix in 3-5 minutes.

If the EZinit prompt has not automatically appeared on the Satellite Page:
The EZinit prompt will automatically appear if the receiver needs to be initialized. The prompt may also appear during normal use if the antenna is shaded. 1. Press the F key.
Note: If the EZinit prompt ever appears after you have initialized the receiver (due to the antennas view of satellites being obstructed by trees, etc.), highlight the no re-init selection with the arrow keypad and press F.

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To initialize the receiver:
1. If the country option is not highlighted, press theD key repeatedly to move the field highlight to the COUNTRY option. 2. Press the F key. 3. Use the D key to scroll through the list options until the country of your present position appears. 4. Use theU key to highlight the country/state/region youre in. If the country youre in is not listed, select another country within 500 miles of your present position. 5. Press F to finish.
The GPS 126/128 will now begin searching for the appropriate satellites for your location and should acquire a position within 3-5 minutes. You can verify that you have acquired a position by watching the Satellite Page transition to the Position Page (provided you havent pressed any other buttons) or by looking for a 2D NAV or 3D NAV status at the top-left corner of the Satellite Page.
Initialization Troubleshooting If you have trouble initializing the receiver or acquiring a position, check the following:
Does the unit have a clear view of the sky?
Use the arrow keypad to highlight the country, region, or state of your present position from the list and press ENTER. If the country is not listed, select the closest country instead.
If there are large buildings or mountains nearby, or if there is heavy tree cover, the receiver may not be receiving enough satellite signals to calculate a position.
Have you selected the right country/state/region from the EZinit list?
Check for the correct approximate lat/lon on the Position Page, or reselect the appropriate country from the list to restart the initialization.
Have you moved more than 500 miles from the last calculated position with the receiver off?
Reinitialize the receiver, selecting the country/state/ region of your new location from the EZinit list.

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APPENDIX B

Mounting the GPS 126 The GARMIN GPS 126 should be mounted in an exposed location with an unobstructed view of the sky. The unit comes with a gimbal bracket that can be used to surface mount the unit. When choosing a location for the display unit, make sure you consider the following conditions: There should be at least 2 (5 cm) clearance behind the case to allow connection of the power/data cable. The mounting surface should be rigid enough to support the unit and protect it from excessive vibration and shock. The built in antenna has an unobstructed view of the sky. To surface mount the GPS 126:

1. Connect the RED harness lead to the positive side of a 10-40 volt DC power source. Make sure the power lead has an in-line 1-amp fuse installed. 2. Connect the BLACK harness lead to a ground strip or the negative side of a 10-40 volt DC power source.
PIN 1 (red): 10-40 volts DC PIN 2 (black): Ground
PIN 3 (blue): NMEA out PIN 4 (brown): NMEA in PIN 5 (white): No connection PIN 6 (green): No connection PIN 7 (yellow): alarm low

10-40 volts DC

Shield Grounded Through GPS

Pin assignment

Autopilot/ NMEA Device GBR 21 Beacon Receiver

(-) Alarm/ Relay

To connect an external alarm, connect the ground side of the alarm device to the YELLOW harness lead. (100 mA DC load max.) The following interface formats are supported by the GPS 126/128 for driving three NMEA devices:
NMEA 0180, NMEA 0182, NMEA 0183 version 1.5: Approved sentences: GPBWC, GPGLL, GPRMB, GPRMC, GPXTE, GPVTG, GPWPL, GPBOD Proprietary sentences: PGRMM (map datum), PGRMZ (altitude), PSLIB (beacon rec. control) NMEA 0183 version 2.0: Approved sentences: GPGGA, GPGLL, GPGSA, GPGSV, GPRMB, GPRMC, GPRTE, GPWPL, GPBOD Proprietary sentences: PGRME (estimated error), PGRMM (map datum), PGRMZ (altitude), PSLIB (beacon receiver control)

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APPENDIX D
Messages & Time Offsets
The GPS 126/128 uses a flashing on-screen message indicator to alert you to important information. Whenever the message indicator appears, press PAGE to view the message page. There are two types of messages: temporary alerts and condition alerts. Temporary alerts are cleared from the message page after viewing, while condition alerts remain until the condition has been resolved. Pay careful attention to all messages for your own safety.
Active WPT Cant be DeletedYou have attempted to change the active to or active from waypoint. Clear the active route or GOTO before making your changes. Accuracy has been DegradedThe accuracy of the GPS 126/128 has been degraded beyond 500 meters due to poor satellite geometry or data quality. You should check other navigational sources to verify the position indicated. Already ExistsThe name you are entering already exists in the GPS 126/128s memory. ApproachingYou are one minute away from reaching a destination waypoint. No DGPS PositionNot enough data is available to compute a DGPS position. No RTCM InputBeacon receiver is improperly connected or baud rates do not match. Poor GPS CoverageThe GPS 126/128 cannot acquire the necessary number of satellites to compute a position. Try another location with a clearer view of the sky. Power Down and Re-initThe GPS 126/128 is not able to calculate a position due to abnormal satellite conditions. Turn the unit off and verify the last position shown by other means. Try the unit again later, possibly in a different location. Read Only Mem has FailedThe permanent memory has failed and the unit is not operable. Received an Invalid WPTA waypoint was received during upload transfer that has an invalid identifier. Receiver has FailedA failure in receiver hardware has been detected. If this message persists, do not use the unit and take it to an authorized dealer for repair. Route is FullYou have attempted to add more than 30 waypoints to a route. Route is not EmptyYou have attempted to copy into a route already in use. Route Waypoint Cant be DeletedThe waypoint you are trying to delete is part of a route. Delete the waypoint from the route before removing it from memory. Route Waypoint was DeletedA route waypoint entered does not exist in the database and has been deleted from the route. RTCM Input has FailedDGPS data being received has been lost. You are no longer receiving the beacon signal. Searching the SkyThe GPS 126/128 is in searching the sky for almanac data or the unit is in AutoLocateTM mode.