Section 6 Target Tracking and AIS
6-42
6.7.3 Lost target warning (Lost)
Memo
If the gain, sea clutter suppression, rain/snow clutter suppression are not adjusted adequately, the
lost target warning 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] warning will be issued. The typical causes for warning
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 warning being issued.
Lost Target Warning
Status
Symbol on
display
Alert
characters
Alert sound
Conditions
Lost target
Red Blinking
Lost
Beep sound
(beep-beep)
Alert
acknowledgeable
The warning will sound once
when a lost target symbol is
displayed.
AIS12
12
Summary of Contents for JMR-5410-4X
Page 2: ......
Page 25: ...xxiii NKE 2255 7 9 6HS Scanner Unit Warning Label ...
Page 27: ...xxv NKE 2103 4 4HS Scanner Unit NKE 2103 6 6HS Scanner Unit NKE 2255 7 9 6HS Scanner Unit ...
Page 54: ...Contents 20 ...
Page 68: ...Section 1 Overview 1 14 Outline Drawing of Radar Antenna NKE 2632 A ...
Page 70: ...Section 1 Overview 1 16 Outline Drawing of Radar Antenna NKE 2043 NKE 2043 ...
Page 72: ...Section 1 Overview 1 18 Outline Drawing of Radar Antenna NKE 2103 4 4HS ...
Page 74: ...Section 1 Overview 1 20 Outline Drawing of Radar Antenna NKE 2255 7 ...
Page 76: ...Section 1 Overview 1 22 Outline Drawing of Radar Antenna NKE 2255 6HS ...
Page 78: ...Section 1 Overview 1 24 Outline drawing of 19inch Display NWZ 214 NWZ 214 ...
Page 80: ...Section 1 Overview 1 26 Outline Drawing of Process Unit NDC 1678 NDC 1678 ...
Page 82: ...Section 1 Overview 1 28 Outline Drawing of Trackball Operation Unit NCE 5605 Option ...
Page 84: ...Section 1 Overview 1 30 Outline Drawing of Junction Box NQE 1143 ...
Page 86: ...Section 1 Overview 1 32 Outline Drawing of 19inch Desktop Frame CWB 1659 ...
Page 88: ...Section 1 Overview 1 34 Outline Drawing of Interswitch Unit NQE 3141 8A Option ...
Page 126: ......
Page 214: ...Section 4 Range and Bearing Measurement Methods 4 32 ...
Page 244: ...Section 5 Basic Operation of the Radar 5 30 ...
Page 324: ...Section 8 Monitoring a Dragging Anchor 8 8 ...
Page 374: ...Section 11 Setting up Screen View 11 20 ...
Page 520: ...Section 15 Maintenance Inspection 15 70 ...
Page 546: ...Section 16 Failures and After Sale Services 16 26 ...
Page 590: ...Appendix A Radar Antenna Display Unit Block Diagrams A 8 A 1 8 NKE 2255 7 9 6HS ...
Page 592: ...Appendix A Radar Antenna Display Unit Block Diagrams A 10 A 1 10 NKE 2063A ...
Page 596: ...Appendix A Radar Antenna Display Unit Block Diagrams A 14 A 2 3 NCE 5794 operation unit ...
Page 622: ...Appendix D Menu List and Materials D 8 Tools VHF Call VHF1 Call VHF2 Call VHF3 Call ...
Page 687: ......