98 |
Tracking |
Argus Radar Operator Manual
Warning:
The operational availability of the tracking function is continuously checked
to warn the operator in case of malfunction.
Various failures can be detected and displayed inside the system failure window. The fail-
ures are listed and explained in Chapter 7.
Operating with the AIS target
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Note:
The AIS operating is equivalent to the relevant radar target functions.
The only operations that can be performed on an AIS target are acquisition and selection.
It is not possible to discard the sleeping target, which is equivalent to the radar echo. What
the operator can do is only to switch the AIS to sleeping. Having the AIS sleeping target, the
symbol will become bigger, the heading and the COG/SOG vector will be visualised. If the
ship is turning, a turn indicator will be visualised. The selection of a sleeping target provokes
its acquisition, plus the visualization of its data in targets data window.
The sleeping AIS target will automatically be acquired by the system when:
•
entering an Auto-Acquisition zone or in the Guard Zone set as Auto-Acquisition zone. The AIS
target does not change, but a message will appear “AIS Target in Guard Zone” if the zone is
configured as a Guard Zone;
•
the CPA/TCPA are lower than the set minimum safe value. In this situation the AIS target is
classified by the system as dangerous.
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Note:
The operator cannot deactivate the dangerous AIS target. When the number of
activated AIS reaches the 95% of the maximum AIS limit, the warning message “ACTIVE AIS
CAPACITY ABOUT TO BE EXCEEDED” is displayed. When the limit of maximum active AIS is
reached, a new activation replaces the farthest AIS and the message “WARN: MAX AIS CAPAC-
ITY REACHED” is shown.
As soon as the AIS target is acquired, the related AIS data will be displayed in the“Target Data
Window” along with the radar target data. The window displays the AIS data and the radar
target data. Information visualised are (see”Target data window” on page 115:
•
Target ID
•
Ship’s name
•
MMSI (Maritime Mobile Service Identity)
•
Call sign
•
Range and bearing
•
SOG and COG
•
CPA/TCPA
•
Latitude and Longitude.
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Note:
The AIS data comes before the radar target information.
By means of the More Info function, available in the targets data window, more details can be
visualised (“Displaying target information” on page 114).
As mentioned above, the Target Data Message is refreshed within the scheduled rate, accord-
ing to the ship’s operation. If message is not received within 6 times the scheduled time, the
target will be classified as lost and an alarm will be given. The target will remain on the PPI in
this condition for 1 minute, after which it will automatically be cancelled, if not acknowledged.
The operator will just need to switch the AIS symbols to Off, if he wants to remove all dis-
played AIS symbols on the PPI. Anyway, the CPA/TCPA and all the anti-collision avoidance
controls are always computed (refer to “Graphic Symbols Menu” display, page 112).
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Note:
CPA and TCPA are calculated also for SAR (Search And Rescue) but they should be taken
only as information. SAR vehicles, helicopters and airplanes being at different altitudes should
not be dangerous to own ship.
Summary of Contents for ARGUS FMCW 3G
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