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11
OTHER FUNCTIONS
■ Lost target
A vessel is regarded as a "Lost target" after a specified period of time has passed since
the vessel last transmitted data, as described below.
The "Lost target" icon disappears from the plotter screen when the preset period of time
has passed after the vessel was regarded as a "Lost target." Ask your dealer for details.
The criteria to become a Lost target
• Class A/B
Class A: Vessel is at anchor, moored and
not moving faster than 3 knots
1
Class B: Vessel is not moving faster than 2
knots
Vessel is at anchor, moored and moving
2
faster than 3 knots
Class A: Vessel is moving between 0 and
14 knots
3
Class B: Vessel is moving between 2 and
14 knots
Class A: Vessel is moving between 0 and
14 knots while changing course
4
Class B: Vessel is moving between 2 and
14 knots while changing course
5 Vessel is moving between 14 and 23 knots
Vessel is moving between 14 and 23 knots
6
while changing course
7 Vessel is moving faster than 23 knots
Vessel is moving faster than 23 knots while
8
changing course
9 Vessel is moving faster than 2 knots
*1 AIS Class B does not provide information about the navigational status, anchored or
moored.
*2 CS: Carrier-sense, *3 SO: Self organized
• Others
SAR aircraft, SAR vessel
AtoN, AtoN virtual, AIS-SART, AIS-MOB, EPIRB-AIS
Base station
61
Vessel type
Category
Lost target
maximum interval
maximum interval
Class A
1080 seconds
60 seconds
60 seconds
60 seconds
36 seconds
36 seconds
30 seconds
30 seconds
N/A
seconds
Lost target maximum interval
60 seconds
1080 seconds
60 seconds
Lost target
Class B *
1
CS *
SO*
2
3
1080 seconds
N/A
180
N/A
seconds
N/A
90
N/A
seconds
N/A
30
N/A
seconds
N/A
180
N/A
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