Garmin GPSMAP 6212 - Manual (Page 22)

6 GPSMAP ® 6000/7000 Series Owner’s Manual
Charts and 3D Chart Views
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
( page 17 ). If an 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.
MMSI Heading Direction of turn
Projected course
Activated
dangerous
target
Target with Course over Ground, Heading, and Rate of Turn
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.
MMSI Heading
Projected course
Activated
target
Target with Course over Ground and Heading
Turning Off AIS Reception
AIS signal reception is turned on by default.
From the Home screen, select Configure > other Vessels > AIS > off .
All AIS functionality on all charts and on all 3D chart views is disabled. This includes AIS vessel
targeting and tracking, collision alarms that result from AIS vessel targeting and tracking, and the
display of information about AIS vessels.