3 Basic Operation of ECDIS 3-191
ECDIS
Conditions for AIS lost targets:
When the data of an AIS target cannot be received for a specified time, the target data is
considered to be lost. As shown in the table below, a time period for judging a target as lost
varies depending on the class of receive data and the target status.
[SOLAS-compliant ship] (Class A)
Target status
Time until judgment
of lost target
Vessel below 3 knots and it is now at anchor or on the moored 18 min
Vessel of 3 knots or more and it is now at anchor or on the moored 60 sec
Vessel of 0 to less than 14 knots 60 sec
Vessel of 0 to less than 14 knots and it is now changing the course 60 sec
Vessel of 14 to less than 23 knots 36 sec
Vessel of 14 to less than 23 knots and it is now changing the course 36 sec
Vessel of 23 knots or more 30 sec
Vessel of 23 knots or more and it is now changing the course 30 sec
[SOLAS-incompliant ship] (Class B)
Target status
Time until judgment
of lost target
Vessel below 2 knots 18 min
Vessel of 2 to less than 14 knots 180 sec
Vessel of 14 to less than 23 knots 180 sec
Vessel of 23 knots or more 180 sec
When an AIS dangerous target is lost and the target data cannot be received for 1 minute, the
target and target data are deleted.
Dangerous Target cam be showed ,only when ARPA is received.
To Next Page
Loading...
