Lost Target Notification (Lost) - JRC JMR-7230-S Instruction Manual

Alarm for New Target Acquired in Automatic Acquisition Guard Zone
Symbol on
Status
display
New target in
automatic
acquisition
guard zone
Red Blinking
Note
When an already acquired target goes into automatic acquisition guard zone, the alarm for the
new target acquired in automatic acquisition guard zone does not sound.

6.7.3 Lost target notification (Lost)

Note
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 canceled
without a lost target notification being issued.
Symbol on
Status
display
12
Lost target
AIS12
Red Blinking
Alert
characters
Beep sound
New (beep-beep)
Target Alarm
12
acknowledgeable
Lost Target Notification
Alert
characters
Beep sound
(beep-beep)
Lost
notification
acknowledgeable
6-59
Alarm sound
The alarm is issued when a
new target is acquired in the
automatic acquisition guard
zone.
Alarm sound
The notification will sound
once when a lost target
symbol is displayed.
Section 6 Target Tracking and AIS
Conditions
Conditions
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