Ais Targeting Symbols; Heading And Projected Course Of Activated Ais Targets - Garmin GPSMAP 10X2 Series Owner's Manual

AIS Targeting Symbols

Symbol Description
AIS vessel. The vessel is reporting AIS information. The direction in which the triangle is pointing
indicates the direction in which the AIS vessel is moving.
Target is selected.
Target is activated. The target appears larger on the chart. A green line attached to the target
indicates the heading of the target. The MMSI, speed, and direction of the vessel appear beneath
the target, if the details setting has been set to Show. If the AIS transmission from the vessel is lost,
a message banner appears.
Target is lost. A green X indicates that the AIS transmission from the vessel is lost, and the chart­
plotter displays a message banner asking whether the vessel should continue to be tracked. If you
discontinue vessel tracking, the lost target symbol disappears from the chart or the 3D chart view.
Dangerous target in range. The target flashes while an alarm sounds and a message banner
appears. After the alarm has been acknowledged, a solid red triangle with a red line attached to it
indicates the location and the heading of the target. If the safe-zone collision alarm has been set to
Off, the target flashes, but the audible alarm does not sound and the alarm banner does not appear.
If the AIS transmission from the vessel is lost, a message banner appears.
Dangerous target is lost. A red X indicates that the AIS transmission from the vessel is lost, and the
chartplotter displays a message banner asking whether the vessel should continue to be tracked. If
you discontinue vessel tracking, the lost dangerous target symbol disappears from the chart or the
3D chart view.
The location of this symbol indicates the closest point of approach to a dangerous target, and the
numbers near the symbol indicate the time to the closest point of approach to that target.
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.
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