Garmin GPS III - Manual (Page 60)

The TracBack navigation feature allows you to retrace your path using the track
log automatically stored in the receiver’s memory. This eliminates the need to manu-
ally store waypoints along the way. A track log is an electronic breadcrumb trail,
showing the path you have travelled. Your GPS III can be set to automatically record
track log points any time the receiver is on and locked onto satellites (see page 63).
TracBack routes are created by reducing your track log into a route of up to 30
waypoints and activating the new route in reverse order along those waypoints. Once
activated, a TracBack route will lead you back to the oldest track log point stored in
memory, so it’s a good idea to clear the active track log at the beginning of your cur-
rent trip (e.g., at the dock or trailhead), before you get started.
To clear the active track log and define a starting point for a TracBack:
1. Press MENU twice to display the Main Menu.
2. Highlight ‘Track Logs’ and press ENTER.
3. With the ‘Active Log’ highlighted press MENU to display the options list.
4. Highlight ‘Clear Active Log’ and press ENTER.
5. Press ENTER to delete the track log data. (Or press QUIT to cancel.)
To create and activate a TracBack route:
1. Enable track log recording and leave the GPS III on to automatically record track log
positions while under way. Refer to page 64 for more information on track log settings.
2. Press MENU twice to display the Main Menu.
3. Highlight ‘Track Logs’ and press ENTER.
4. Highlight the desired track log (‘Active Log’ or ‘Saved Logs’) and press MENU to
display the options list.
5. Highlight ‘TracBack’ and press ENTER to create/activate the TracBack route. (A
message box will appear while the GPS III analyzes the data and creates the route.)
Clear the old track log before
you depart. This defines the
starting point for a TracBack
route.
A TracBack route can also be
created from the GOTO
Options by pressing GOTO,
followed by MENU.
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REFERENCE
TracBack
GPS III A 7/21/98 8:52 AM Page 52