Tips on Creating and Using the TracBack Feature
The GPS 92’s TracBack feature is designed to help you
quickly create and activate a route that follows your path
back to a user-defined starting point. To get the most out
of the TracBack feature, remember the following tips:
• Always clear your track log at the exact point which
you will want to go back to (airport, landing field,
etc.).
• The ‘RECORD’ option on the track log setup page
must be set to ‘WRAP’ or ‘FILL’.
• There must be at least two track log points stored in
memory to create a TracBack route.
• If there are not enough available waypoints in
memory to create a TracBack route, you will be
alerted with a ‘waypoint memory full’ message. The
receiver will use any available waypoints to create a
TracBack route with an emphasis on the track log
closest to the destination (the oldest track log point
in memory).
• If the ‘CRITERIA’ option on the track log setup page
is set to a time interval, the TracBack route may not
follow your exact path (keeping the criteria set to
‘AUTO’ will always provide the best TracBack
route).
• If the changes in direction and distance of your
track log are very complex, 30 waypoints may not
be enough to accurately mark your exact path. The
receiver will then assign the 30 waypoints to the
most significant points of your track and simplify
segments with fewer changes in direction.
• If you want to save a TracBack route, copy route 0
to an open storage route before activating another
TracBack. Activating another TracBack or storage
route will overwrite the existing TracBack route.
• Whenever a TracBack route is activated, the receiv-
er will automatically erase any temporary way-
points (e.g., ‘T001’) that are not contained in routes
1-19. If there are temporary waypoints stored in
routes 1-19, the receiver will create any new tem-
porary waypoints using the first three-digit number
available.
To save a TracBack route,
be sure to copy route 0 to
another route. To save a
temporary waypoint, sim-
ply rename it following the
instructions on page 27.
The TracBack function
allows you to navigate your
track log back to the oldest
track point in memory.
TracBack
Navigation
Reference
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92 manual 4/15/98 3:48 PM Page 32