Reference
29
TracBack Navigation/
MOB: Man OverBoard
• There must be at least two track log points stored in memory to create a TracBack route.
• If the track log interval is set to the ‘Time’ option, the route may not Navigate your exact path (keep
the interval set to ‘Resolution’ for best performance).
• If the receiver is turned off or satellite coverage is lost during your trip, the TracBack will draw a
straight line between any point where coverage was lost and where it resumed.
• If your track’s changes in distance and direction are too complex, 50 waypoints may not mark your
path accurately. The receiver then assigns the 50 waypoints to the most signifi cant points of your
track, and simplifi es segments with fewer changes in direction.
To stop TracBack navigation:
1. Press the
NAV
key, highlight ‘Stop Navigation’ and press
ENTER
.
For more information on setting up the Track options and saved tracks, see pages 447-48.
MOB
The GPSMAP 176’s Man OverBoard function (MOB) lets you simultaneously mark and set a course
to a position for quick response to emergency situations.
To activate the MOB function:
1. Press and hold the
MOB
key, or press the
MOB
key twice.
2. Press
ENTER
to confi rm and begin navigating to the MOB position.
Once a MOB has been activated, a ‘MOB’ waypoint with an international MOB symbol will be
created and the unit will be on an active navigation to that point. Use any of the Navigation Pages to
guide you back to the MOB point. The MOB waypoint will be stored in the waypoint list and may be
deleted like any other waypoint.
To stop navigation to the MOB position:
1. Press the
NAV
key, highlight ‘Stop Navigation’ and press
ENTER
.
The MOB function allows you to quickly activate a navigation
back to a location.
Highlight ‘Yes’ and press ENTER to stop navigation.
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