User's Manual

Table Of Contents
NACOS Platinum
ED 3100 G 110 / 02 (2011-10)
Operating Instructions
A-7 Target Handling
A RADAR.fm / 10.11.11
A-66
7.8 Deletion and Loss of Targets
Loss of Targets
An ARPA target is tracked automatically until
- it is deleted manually or
- it leaves the target tracking range of 24 NM or
- it is lost within the target tracking range of 24 NM.
An ARPA target is lost if, during five revolutions of the antenna, no correlation of the video can be found
by the radar, or the detection probability falls below 50%.
An AIS target is tracked automatically until
- it is deleted manually or
- it is lost.
A tracked AIS target is lost if the AIS electronics unit does not receive any more signals from that target
within the specified time
1)
.
Deletion of a Target
Click on the target with the MORE key, and then choose the
target type from the context menu and click on the desired
action with the DO key.
If an AIS target is deleted which is also tracked in the
background as an ARPA target (See chapter 7.7 on
page A-65), the hidden ARPA symbol re-appears. If it
is to be deleted also, the process must be repeated for
the ARPA target.
This procedure also works vice-versa: If an ARPA
target being tracked as AIS is deleted, the hidden AIS
symbol re-appears.
For information about automatic target acquisition See chapter 7.4 on page A-61
1)
The receive timeout is dependent on the navigation state and the speed of the AIS target.