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Types and Definitions of AIS Target Symbols
Vector/Symbol Definition Remarks
Sleeping target
This symbol is displayed when received data is valid.
The direction of the triangle’s vertex indicates the
target’s bow or course.
Activated target
The heading direction is displayed with a solid line, and
the course vector is displayed with a dotted line. The
line perpendicular to the heading direction indicates the
direction to which the course is to be changed. This line
may not be displayed.
Target acquired in automatic
acquisition zone
The alarm sounds.
The alarm message (New Target) turns red and blinks.
Outline display The outlines of ships are displayed scaled down.
Numeric displayed target
When the numeric data is displayed, the target symbol
is enclosed in a square.
Dangerous target
The alarm sounds.
The alarm message (CPA/TCPA) turns red and blinks.
The symbol is turns red.
Lost target
The alarm sounds.
The alarm message (Lost) turns red and blinks.
The symbol is indicated with X mark in red.
Sleeping AIS-SART target Displayed by the same color as AIS symbol.
AIS12
Activated AIS-SART target Displayed target No. nearby the symbol.
AIS12
Numerical display
AIS-SART target
The symbol is enclosed with the square.
AIS12
AIS12
AIS12
AIS12
AIS12
AIS12
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