User's Manual

Table Of Contents
NACOS Platinum
ED 3100 G 110 / 02 (2011-10)
Operating Instructions
A-7 Target Handling
A RADAR.fm / 10.11.11
A-64
7.6 Settings for Acquisition/Guard Zones
In the case of automatic target acquisition by means of acquisition/guard zones, the radar evaluates all
radar echoes and sleeping AIS targets appearing in the acquisition/guard zones.
If the radar echo appears at a certain position at least six times during ten revolutions of the antenna,
it is evaluated as an ARPA target. If the echoes do not belong to a target already being tracked, the
position is treated as an acquired target and is marked with the flashing symbol . The Target
Auto-Acquired alarm appears, or - if the target has already been tracked when it entered the acquisi-
tion/guard zone - the Target Entered Guardzone alarm appears. After acknowledgement of the alarm,
the automatic target tracking begins.
If a sleeping AIS target enters the region of a switched-on acquisition/guard zone, it is activated auto-
matically, afterwards
- it is marked with the flashing symbol or if the function AIS True Scaled Outline is activated
the AIS target can be shown with the true scaled outlines
-the Target Auto Acquired alarm appears, or - if the target has already been active when it
entered the acquisition/guard zone - the Target Entered Guardzone alarm appears.
If there are already 95% of the maximum number of ARPA targets or 95% of the maximum number of
AIS targets being tracked or acquired, the Check ARPA/AIS Target Capacity warning appears. In this
case, at least one unimportant target must first be deleted before another target can be acquired.
If there are already 100% of the maximum number of ARPA targets or 100% of the maximum number
of AIS targets being tracked or acquired, the ARPA/AIS Target Capacity Exceeded alarm appears.
In this case, at least one unimportant target must first be deleted before another target can be acquired.
Two independent acquisistion/guard zones can be switched on in
order to acquire targets automatically.The acquisition/guard zone
is switched on and off by checking the controls Zone 1 or
Zone 2.
If the acquisition/guard zone is switched off, automatic target
acquisition does not take place any longer. Targets already
being acquired or activated will be tracked further on.
Setting the Range of the Acquisition/
Guard Zone
Example shown for Guard Zone 1: Click on
the arc that defines the acquisition/guard
zone and use the small handle to drag the
zone to the desired size.
The outer limit can be set to a range
value between 1.5 NM and 20 NM.
Setting the Angle of the Acquisition/
Guard Zone
Click on the angle line that defines the acqui-
sition/guard zone and use the small handle to
drag the zone to the desired angle.
The angle can be set to a value between 5° and 360°. The setting takes place relative to the
heading direction, i.e. the acquisition/guard zone turns with the ship’s heading.
Handles