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10.8 AIS target symbols
Your multifunction display shows a range of symbols to represent
the different types of AIS target.
Target type
Description
Symbol
Transmitting target
Target is moving or at
anchor (Target is not
activated, dangerous or
lost).
Activated target
Target activated —
that is, AIS vector
displayed. Vector
line (optional) shows
predicted distance
travelled within a given
time.
Selected target
Target selected with
cursor. Can view
detailed data.
Dangerous target
Targets within specified
distance (CPA) or time
(TCPA). Dangerous
target alarm sounds if
enabled. Target red and
flashing.
Uncertain target
Calculated CPA / TCPA
value uncertain.
Target type
Description
Symbol
Lost target
When the signal of a
dangerous target not
received for 20 seconds.
Target in latest predicted
position. Alarms sounds
if enabled. Target
flashes.
Buddy target
Target has previously
been added to the Buddy
List.
Aid To Navigation (AToN)
target (Real)
AToN target is ON
position.
Aid To Navigation (AToN)
target (Real)
AToN target is OFF
position.
Aid To Navigation (AToN)
target (Virtual)
AToN target is ON
position.
Aid To Navigation (AToN)
target (Virtual)
AToN target is OFF
position.
Land base station target
Land base station target
is ONLINE.
Using AIS
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