Section 6 Target Tracking and AIS
6-38
6.6.7 Conditions for deciding AIS target to be lost
About an AIS target lost
When the data of a target cannot be received for a specified time, the target is decided to be lost and
the target data is deleted. As shown in the table below, the time until target data is deleted varies
depending on the class of received data and the target status.
Memo
•
Since the lost time and that of the AIS indicator are different, this equipment may display lost
information earlier than the AIS display depending on the target status (speed, navigation
status, etc.).
•
The target of lost target is continuously displayed until Lost Warning is approved.
Since negligence of approval operation may hinder display of a new AIS target, perform
approval operation as soon as possible.
•
When a dangerous target ship is lost, a lost alarm is issued and the symbol changes to a lost
symbol. The system calculates the current position from the last-received data and continues
displaying the symbol for eternity.
•
When the [AIS] button in the target ship information window is turned off, the symbol is
cancelled.
Conditions for Deciding Target to be Lost
Target status
Time until data is lost
SOLAS ship
(Class A)
Non-SOLAS ship
(Class B)
CS (Carrier
Sense)
SO (Self
Organising)
Vessel below 3 kn (Class A) or 2 kn (Class B) and
it is now at anchor or on the berth
18 min
18 min
Vessel of more than 3 kn and it is now at anchor or
on the berth
60 sec
-
Vessel of 0 to 14 kn (Class B: 2 to 14 knots)
60 sec
180 sec
Vessel of 0 to 14 kn and it is now changing the
course
60 sec
180 sec
Vessel of 14 to 23 knots
36 sec
180 sec
90 sec
Vessel of 14 to 23 kn and it is now changing the
course
36 sec
180 sec
90 sec
Vessel of more than 23 kn
30 sec
180 sec
30 sec
Vessel of more than 23 kn and it is now changing
the course
30 sec
180 sec
30 sec
AtoN (Aids to navigation)
15 min
15 min
SART
6 min
6 min
AIS SAR aircraft
60 sec
60 sec
AIS coastal base station
60 sec
60 sec
Содержание JMR-5410-4X
Страница 2: ......
Страница 22: ...xx NQE 3167 Power Control Unit NCT 4106A NSK Unit NBA 5111 Rectifier Warning Label Warning Label Warning Label ...
Страница 25: ...xxiii NKE 2255 7 9 6HS Scanner Unit Warning Label ...
Страница 27: ...xxv NKE 2103 4 4HS Scanner Unit NKE 2103 6 6HS Scanner Unit NKE 2255 7 9 6HS Scanner Unit ...
Страница 54: ...Contents 20 ...
Страница 68: ...Section 1 Overview 1 14 Outline Drawing of Radar Antenna NKE 2632 A ...
Страница 70: ...Section 1 Overview 1 16 Outline Drawing of Radar Antenna NKE 2043 NKE 2043 ...
Страница 72: ...Section 1 Overview 1 18 Outline Drawing of Radar Antenna NKE 2103 4 4HS ...
Страница 74: ...Section 1 Overview 1 20 Outline Drawing of Radar Antenna NKE 2255 7 ...
Страница 76: ...Section 1 Overview 1 22 Outline Drawing of Radar Antenna NKE 2255 6HS ...
Страница 78: ...Section 1 Overview 1 24 Outline drawing of 19inch Display NWZ 214 NWZ 214 ...
Страница 80: ...Section 1 Overview 1 26 Outline Drawing of Process Unit NDC 1678 NDC 1678 ...
Страница 82: ...Section 1 Overview 1 28 Outline Drawing of Trackball Operation Unit NCE 5605 Option ...
Страница 84: ...Section 1 Overview 1 30 Outline Drawing of Junction Box NQE 1143 ...
Страница 86: ...Section 1 Overview 1 32 Outline Drawing of 19inch Desktop Frame CWB 1659 ...
Страница 88: ...Section 1 Overview 1 34 Outline Drawing of Interswitch Unit NQE 3141 8A Option ...
Страница 126: ......
Страница 214: ...Section 4 Range and Bearing Measurement Methods 4 32 ...
Страница 244: ...Section 5 Basic Operation of the Radar 5 30 ...
Страница 324: ...Section 8 Monitoring a Dragging Anchor 8 8 ...
Страница 374: ...Section 11 Setting up Screen View 11 20 ...
Страница 380: ...Section 12 Setting up Alerts 12 6 Polygon tab Set a polygon alarm issuing range This function cannot be used now ...
Страница 520: ...Section 15 Maintenance Inspection 15 70 ...
Страница 546: ...Section 16 Failures and After Sale Services 16 26 ...
Страница 590: ...Appendix A Radar Antenna Display Unit Block Diagrams A 8 A 1 8 NKE 2255 7 9 6HS ...
Страница 592: ...Appendix A Radar Antenna Display Unit Block Diagrams A 10 A 1 10 NKE 2063A ...
Страница 596: ...Appendix A Radar Antenna Display Unit Block Diagrams A 14 A 2 3 NCE 5794 operation unit ...
Страница 622: ...Appendix D Menu List and Materials D 8 Tools VHF Call VHF1 Call VHF2 Call VHF3 Call ...
Страница 687: ......