66
1
7
4
10
15
18
2
8
13
5
11
16
3
9
14
6
12
17
OTHER FUNCTIONS
9
■
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
Lost target
maximum interval
Class A
Lost target
maximum interval
Class B *
1
CS *
2
SO*
3
1
Class A: Vessel is at anchor, moored and
not moving faster than 3 knots
Class B: Vessel is not moving faster than 2
knots
1080 seconds
1080 seconds
2 Vessel is at anchor, moored and moving
faster than 3 knots
60 seconds
N/A
3
Class A: Vessel is moving between 0 and
14 knots
Class B: Vessel is moving between 2 and
14 knots
60 seconds
N/A
180
seconds
4 Vessel is moving between 0 and 14 knots
while changing course
60 seconds
N/A
5 Vessel is moving between 14 and 23 knots
36 seconds
N/A
90
seconds
6 Vessel is moving between 14 and 23 knots
while changing course
36 seconds
N/A
7 Vessel is moving faster than 23 knots
30 seconds
N/A
30
seconds
8 Vessel is moving faster than 23 knots while
changing course
30 seconds
N/A
9 Vessel is moving faster than 2 knots
N/A
180
seconds
N/A
*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
60 seconds
AtoN
1080 seconds
Base station
60 seconds