Garmin GPSMAP 238 Sounder User Manual download pdf (Page 66)

Reference

TracBack Navigation/

MOB: Man OverBoard

• If the track log interval is set to the ‘Time’ option, the route may not follow 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 log’s changes in distance and direction are too complex, 254 waypoints may not mark

your path accurately. The receiver then assigns the 254 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 75-76.

MOB Key

The GPSMAP 188/188C/238 Sounder’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 the MOB key.

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 is created

and the unit is set on an active navigation to that point. Use any of the Navigation Pages to guide you

back to the MOB point. The MOB waypoint is stored in the waypoint list and may be deleted like any

other waypoint (see page 50).

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

course back to a location.

Highlight ‘Stop

Navigation’ and

press ENTER to

stop navigating.

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Garmin GPSMAP 238 Sounder User Manual Page 66