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NOTE: Vessels being tracked with the Blue Force Tracking feature are indicated with a blue-green color
regardless of their status.
Heading and Projected Course of Activated AIS Targets
When heading and course over ground information are provided by an activated AIS target, the heading of the
target appears on a chart as a solid line attached to the AIS target symbol. A heading line does not appear on a
3D chart view.
The projected course of an activated AIS target appears as a dashed line on a chart or a 3D chart view. The
length of the projected course line is based on the value of the projected heading setting. If an activated AIS
target is not transmitting speed information, or if the vessel is not moving, a projected course line does not
appear. Changes in the speed, course over ground, or rate of turn information transmitted by the vessel can
impact the calculation of the projected course line.
When course over ground, heading, and rate of turn information are provided by an activated AIS target, the
projected course of the target is calculated based on the course over ground and the rate of turn information.
The direction in which the target is turning, which is also based on the rate of turn information, is indicated by
the direction of the barb at the end of the heading line. The length of the barb does not change.
When course over ground and heading information are provided by an activated AIS target, but rate of turn
information is not provided, the projected course of the target is calculated based on the course over ground
information.
Activating a Target for an AIS Vessel
1 From a chart or 3D chart view, select Menu > Layers > Other Vessels > AIS > AIS List.
2 Select a vessel from the list.
3 Select Review and review the target information.
4 Select Activate Target.
Viewing a List of AIS Threats
From a chart or 3D chart view, select Menu > Layers > Other Vessels > AIS > AIS List.
Setting the Safe-Zone Collision Alarm
Before you can set a safe-zone collision alarm, you must have a compatible chartplotter connected to an AIS
device.
The safe-zone collision alarm is used only with AIS. The safe zone is used for collision avoidance, and can be
customized.
1 Select Settings > Alarms > AIS > AIS Alarm > On.
A message banner appears and an alarm sounds when an AIS-activated vessel enters the safe-zone area
around your boat. The object is also labeled as dangerous on the screen. When the alarm is off, the message
banner and audible alarm are disabled, but the object is still labeled as dangerous on the screen.
2 Select Range.
3 Select a distance for the safe-zone radius around your vessel.
4 Select Time To.
5 Select a time at which the alarm will sound if a target is determined to intersect the safe zone.
For example, to be notified of a pending intersection 10 minutes before it will likely occur, set Time To to 10,
and the alarm will sound 10 minutes before the vessel intersects the safe zone.
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Charts and 3D Chart Views
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