User's Manual

Table Of Contents
ED 3100 G 110 / 02 (2011-10)
Operating Instructions
A-7 Target Handling
A RADAR.fm / 10.11.11
A-81
NACOS Platinum
7.15 ARPA Malfunctions
There are a couple of possible reasons for which the ARPA cannot compute the target data correctly.
Possible alarm messages:
1. Heading sensor fault: Heading Invalid or Heading Timeout
2. Magnetron Fault
3. No Headmarker
4. No Trigger
5. No Antenna Azimuth
6. No RADAR Video
For further information regarding the alarms please See chapter 2.2 on page V-11
In case that the compass system is faulty, the radar goes immediately into the Head-Up mode. All
display objects and operating possibilities for which the heading information is required are no
longer shown or are inactive. All ARPA and AIS targets are deleted from the screen at once. If the
heading sensor failure is not corrected within 30 seconds, all tracking of targets is stopped. The
additional reasons for the malfunction of the ARPA calculation are listed below.