JRC JMR-7210-6X - Conditions for Deciding AIS Target to be Lost

6-55 Section 6 Target Tracking and AIS
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3 Select the track color from the [Track No.] combo box.
The selection items are as follows.
Off, No.1-Color, No.2-Color, No.3-Color, No.4-Color, No.5-Color, No.6-Color, No.7-Color,
No.8-Color, No.9-Color, No.10-Color, No.11 to 20-Color
* In "Color," the track color name set by clicking [View] - [Options] - [Target Track] - [Plot] is
displayed. For the details, refer to "16.2.8 Setting up the Display of Other Ship's Track".
6.6.7 Conditions for deciding AIS target to be lost
About an AIS target lost
When the data of a target cannot be received for a specified time, the target is decided to be lost and
the target data is deleted. As shown in the table below, the time until target data is deleted varies
depending on the class of received data and the target status.
Note
• Since the lost time and that of the AIS indicator are different, this equipment may display lost
information earlier than the AIS display depending on the target status (speed, navigation
status, etc.).
Conditions for Deciding Target to be Lost
Target status
Time until data is lost
SOLAS ship
(Class A)
Non-SOLAS ship
(Class B)
CS (Carrier
Sense)
SO (Self
Organizing)
Vessel below 3 kn (Class A) or 2 kn (Class B) and
it is now at anchor or on the berth
18 min 18 min
Vessel of 3 kn or more and it is now at anchor or
on the berth
60 sec 18 min
Vessel of 0 to 14 kn (Class B: 2 to 14 knots) 60 sec 180 sec
Vessel of 0 to 14 kn and it is now changing the
course
60 sec 180 sec
Vessel of 14 to 23 knots 36 sec 180 sec 90 sec
Vessel of 14 to 23 kn and it is now changing the
course
36 sec 180 sec 90 sec
Vessel of 23 kn or more 30 sec 180 sec 30 sec
Vessel of 23 kn or more and it is now changing the
course
30 sec 180 sec 30 sec
AtoN (Aids to navigation) 18 min 18 min
SART 6 min 6 min
AIS-AtoN 6 min 6 min
AIS SAR aircraft 60 sec 60 sec
AIS coastal base station 60 sec 60 sec