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■ 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 display 6 minutes and 40 seconds after
the vessel was regarded as a "Lost target." Ask your dealer for details.
The criteria to become a Lost target
• Class A/B
Vessel type
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
Vessel is moving between 0 and 14 knots
4
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
Category
Lost target maximum interval
SAR aircraft
AtoN
Base station
60 seconds
1080 seconds
60 seconds
OTHER FUNCTIONS
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
9
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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