JRC JMR-7230-S3 - About AIS Aton (Aids to Navigation); About AIS-SART Information; About Display Priority of AIS Targets

Section 6 Target Tracking and AIS 6-10
6.3.4 About AIS AtoN (Aids to Navigation)
AIS AtoN is a system that displaying aid to navigation like a lighthouse, light buoy or unreal aid to
navigation on the display unit on ships using AIS receiver.
There are following two kinds of AIS AtoN.
AIS AtoN type
Function
Operation example
Real AIS AtoN Installs the AIS on real aid to
navigation, and displays its location
on the display unit on ships.
In low visibility, receiving the Real AIS
AtoN symbols facilitates identification of
the light location and light buoy.
Virtual AIS AtoN Displays virtual aid to navigation on
the display unit on ships according
to the signals transmitted from the
AIS station on the land.
In the sea area where installation of the
light buoy is difficult, the Virtual AIS AtoN
symbols are displayed as virtual light
buoys that are used as targets for getting
to the destination.
This system can also be used as the aid
substituted for the aid to navigation
damaged by natural disasters.
6.3.5 About AIS-SART Information
The AIS-SART function enables information about the location of wrecked ship to be displayed on the
screen.
For the details, refer to "7.5 Display of AIS-SART".
6.3.6 About Display Priority of AIS Targets
Up to 500
*1
targets can be displayed in total of activated and sleeping AIS targets. Up to 500 activated
AIS targets can be displayed in the total.
When there is an AIS target of 500
*1
or more, the display is made according to the following priority
order.
*1: The maximum number of AIS targets displayed can be changed to the option of 1000 targets.
If the number of targets at the same priority level exceeds the allowable maximum, they are displayed
in the following priority order:
1. Association target
2. Activated AIS target
3. Sleeping AIS target
High priority
Low priority
1. Numeric displayed target
2. Target of which CPA/TCPA is lower than the set value
(Target as a dangerous ship for which an alarm has been generated)
3. Target in automatic activation zone
4. Activated AIS target
5. Target inside AIS filter
6. Target outside AIS filter
High priority
Low priority