5.5 ALARM DISPLAY
566
5
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Lost Target Alarm
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 alarm will be generated. The typical causes for alarm generation are
shown below, but not limited to the following:
x
The target echo is very weak.
x
The target is shadowed by a shore or a large ship and its echo is not received.
x
The target echo is blurred by sea clutter returns.
If a target under tracking goes into a range of 32 nm and can no longer be tracked, it is canceled without a lost
target alarm being issued.
Lost Target Alarm
Status
Symbol on display
Alarm characters
Alarm sound
Conditions
Lost target
Red Blinking
Lost
Beep
sound (pee)
Alarm
acknowledgeable
The alarm will sound once
when a lost target symbol is
displayed.
The AIS symbol blinks for x only.
12
AIS12
z
If the gain, sea clutter suppression, rain/snow clutter
suppression are not adjusted adequately, the lost
target alarm may be easily generated. So such
adjustments should be mad carefully.
Attention
Summary of Contents for JMA-5212-4
Page 2: ......
Page 18: ... xii NKE 2103 6 6HS Scanner Unit NKE 2254 7 9 6HS Scanner Unit Warning Label Warning Label ...
Page 19: ... xiii ...
Page 38: ... xxxii ...
Page 45: ...1 4 EXTERIOR DRAWINGS 1 6 1 y Fig 1 1 Exterior Drawing of Scanner Unit Type NKE 2103 4 ...
Page 46: ...1 7 Fig 1 2 Exterior Drawing of Scanner Unit Type NKE 2103 6 ...
Page 47: ...1 4 EXTERIOR DRAWINGS 1 8 1 y Fig 1 3 Exterior Drawing of Scanner Unit Type NKE 2254 7 ...
Page 48: ...1 9 Fig 1 4 Exterior Drawing of Scanner Unit Type NKE 2254 9 ...
Page 49: ...1 4 EXTERIOR DRAWINGS 1 10 1 y Fig 1 5 Exterior Drawing of Monitor Unit Type NWZ 164 ...
Page 50: ...1 11 Fig 1 6 Exterior Drawing of Processor Unit Type NDC 1460 ...
Page 51: ...1 4 EXTERIOR DRAWINGS 1 12 1 y Fig 1 7 Exterior Drawing of Keyboard Unit Type NCE 7699A ...
Page 52: ...1 13 Fig 1 8 Exterior Drawing of NSK Unit Type NCT 4106A ...
Page 56: ...1 17 ...
Page 58: ...2 1 2 1 EXAMPLE OF DISPLAY ...
Page 78: ...2 21 ...
Page 234: ...3 155 ...
Page 316: ...5 75 ...
Page 332: ...6 15 ...
Page 358: ...7 25 Exit 1 Press RADAR MENU key The Main Menu will reappear ...
Page 434: ...8 39 ...
Page 452: ...10 5 ...
Page 477: ...Figure 8 NKE 2254 Interconnection Diagram of Scanner Unit ...
Page 493: ......