Yanmar YD42, Operation Manual

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AIS
Dangerous vessels
You can define an invisible guard zone around your vessel. When a
target comes within the set limits, the symbol changes to the
Dangerous target symbol. An alarm is triggered if activated, refer to
the alarms section.
Speed and course
The extension line can be used to indicate speed and course for
targets, either as absolute (true) motion or relative to your vessel.
AIS icon orientation
Sets the orientation of the AIS icon, either based on heading or COG
information.
MMSI
Used for entering your own MMSI (Maritime Mobile Service Identity)
number into the system. You need to have this number entered to
User settings | YD42 Operation Manual
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