vessel's heading is shown on the situation
display. You may choose between True or
Magnetic.
Bearing to target
mode
Select how to display bearings to targets. The
default is magnetic and is recommended for
easy visual identification of targets using a
compass and/or binoculars. However, if you
prefer you may select true or relative
bearings.
Relative bearings show the target's bearing
relative to your own vessel's heading (eg.
000R is directly ahead of you, 180R is
directly behind, 270R is off your port beam,
and 090R is off your starboard beam).
To display relative bearings, heading data for
your vessel should be available. This data
may be output from a heading sensor or
autopilot. Consult the manual for these
devices. The
AIS
WatchMate
accepts NMEA
0183 sentences HDG, HDT, or HDM for
heading data.
Note:
If heading data is not available then
relative bearings will be shown relative to
your course rather than your heading.
Note:
If magnetic variation is not provided
by your GPS or heading sensor then magnetic
bearings will be shown as true.
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