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5.1 Preparation
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5.1.2 Definitions of Symbols
Types and Definitions of Target Tracking Symbols
Vector/Symbol Definition Remarks
Initial acquisition target
This symbol is displayed until the vector is displayed
after target acquisition.
Target acquired in
automatic acquisition zone
The alarm sounds.
The alarm message (New Target) turns red and blinks.
The symbol is red colored.
Tracked target
Dangerous target
The alarm sounds.
The alarm message (CPA/TCPA) turns red and blinks.
The symbol is turns red, and indicates with X mark.
Numeric displayed target
When the numeric data is displayed, the target symbol
is enclosed in a square.
Lost target
The alarm sounds.
The alarm message (Lost) turns red and blinks.
The symbol is turns red, and indicates with X mark.
Past position
The past positions of an AIS target are displayed as
well as the target tracking symbol.
Target track
The track of another ship as an AIS target is displayed
as well as the target tracking symbol.
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