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MOB
The GPSMAP 135 Sounder’s man overboard function (MOB) lets you simul-
taneously mark and set a course to a position for quick response to emergency sit-
uations.
To activate the MOB function:
1. Press the
B
key.
2. Press the
T
key to confirm and begin navigating to the MOB position.
Once a MOB has been activated, a MOB icon will appear on the map display,
and the destination field on the map page will display the bearing, distance, and
ETE to the MOB position based on your present speed and course.
To stop navigation to the MOB position:
1. Press the
G
key, followed by
O
, to display the GOTO options page.
2. Select the ‘Cancel GOTO’ option and press
T
.
TracBack Navigation
The third method of navigating to a destination is by using the GPSMAP 135
Sounder’s TracBack feature. The TracBack function allows you to retrace your
path using the track log automatically stored in the receiver’s memory, which will
eliminate the need to store waypoints along the way. TracBack routes are created
by reducing your 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 stored track log point, so it’s good idea to clear the existing
track log at the start of your current trip (e.g., your dock) before you get started.
To clear the track log and define a starting point for a TracBack route:
1. Press the
O
key twice to display the main menu page.
2. Highlight the ‘Track’ option and press
T
.
3. Select the ‘Delete Track?’ option and press
T
.
60
SECTION
8
GOTO/MOB
MOB & TracBack
Navigation
A
B
A. The GPSMAP 135 Sounder’s MOB mode can be
used to set a course to a passing spot for quick
response to emergency situations, fish strikes, etc.
B. To define a starting point for a TracBack route,
clear the track log.
GPS 135 Rev C 8/4/98 4:18 PM Page 60