Garmin GPS 125 Sounder - Manual (Page 33)

TracBack Navigation
The third method of navigating to a destination is
by using the GPS 125 Sounder’s TracBack feature. The
TracBack function allows you to quickly and easily
retrace your path using the track log automatically
stored in the receiver’s memory. The advantage of the
TracBack feature is to eliminate the need to mark way-
points along the way and manually create and activate
a route back to where you began your trip.
The TracBack route is created by reducing your
current track log into a route of up to 30 waypoints,
and activating an inverted route along those points.
Once activated, a TracBack route will lead you back to
the oldest track log point stored in memory, so it’s usu-
ally a good idea to clear the existing track log at the
starting point of your current trip (e.g. your car or the
dock)
before you get started.
To clear the track log and define a starting point
for a TracBack route:
1. From the Menu Page, highlight ‘TRACK LOG’.
2. Press F to access the track log page.
3. Use the
U
key to highlight the ‘CLEAR LOG?’ option.
4. Press F . A confirmation page will appear.
5. Use
L
to highlight the ‘Yes?’ prompt and press
F
.
To activate a TracBack route:
1. From the Menu Page, highlight ‘TRACK LOG’ option.
2. Press
F
to access the track log page.
3. Highlight the ‘TRACBACK?’ option and press F .
Once the TracBack function has been activated, the
GPS 125 Sounder will take the track log currently
stored in memory and divide it into segments called
legs. Up to 30 temporary waypoints (e.g., ‘T001’) will
be created to mark the most significant features of the
track log in order to duplicate your exact path as close-
ly as possible. A TracBack route from your present
position to the oldest track log point will be created as
an active route (the active route page will appear), and
provide steering guidance to each waypoint back to the
starting point of your track log.
29
Clearing the log before you
get started will define the
position the TracBack func-
tion will return you to.
REFERENCE
TracBack
Navigation
Highlight ‘TRACBACK?’
and press ENTER to begin
TracBack navigation.
125 Man Rev B 7/23/98 11:47 AM Page 29