Lost Target Notification (Lost) - JRC JMR-5410-4X Instruction Manual

6.7.3 Lost target notification (Lost)

Memo
If the gain, sea clutter suppression, rain/snow clutter suppression are not adjusted adequately, the
lost target notification may be easily generated. So, such adjustments should be very carefully.
When it is impossible to continue tracking any acquired and tracked target, or the data of AIS target
cannot received for a specified time, the [Lost] notification will be issued. The typical causes for alarm
are shown below:
•
The target echo is very weak.
•
The target is hidden by a shore or a large ship and its echo is not received.
•
The target echo is blurred by sea clutter or rain/snow clutter.
If a target under tracking goes into a range over 32 NM and can no longer be tracked, it is cancelled
without a lost target notification being issued.
Symbol on
Status
display
Lost target
Red Blinking
Section 6 Target Tracking and AIS
Lost Target Notification
Alert
characters
12
Lost
AIS12
Alarm sound
Beep sound
The notification will sound
(beep-beep-beep)
once when a lost target
notification
symbol is displayed.
acknowledgeable
6-42
Conditions