R5
SUPREME - Navigation System
TROUBLESHOOTING
7000 118-383, P11A1
Page 129
NAV: RAIM Status - Unsafe (ID 164)
This alarm is active when the RAIM status is unsafe.
NAV: Redundant System Connection Lost (ID 166)
No connection to an external R5 SUPREME Navigation system in redundant system
configuration.
NAV: Anchor Alarm Distance Exceeded (ID 167)
This alarm is active when the anchor watch function is in operation and the range limit has
been exceeded.
NAV: DGNSS Integrity Alert (ID 169)
This alarm is active when any of the following conditions apply:
No DGNSS Signal: A correction source for GNSS other than None has been selected
in the
GNSS Configuration
view and more than ten seconds have passed since a new
set of differential corrections were applied to the navigation solution.
Station Unhealthy: Beacon been selected as correction source for GNSS and the
radio beacon station in use indicates an unhealthy status.
Station Unmonitored: Beacon been selected as correction source for GNSS and the
radio beacon station in use indicates an unmonitored status.
Poor Signal: Beacon been selected as correction source for GNSS and word error
rate of the received signal in use exceeds 10%.
NAV: Sensor Malfunction
This alarm is active if a hardware issue has occurred in the R5 Navigation Sensor.
13.4 Troubleshooting via the CDU
There is a lot of information and data accessible via the R5 SUPREME CDU that can be
useful for troubleshooting, and that can help finding a presumed problem. The following items
are just a few examples what to look for.
Current Time
The time (UTC or LOC) in the upper right corner of the display is provided by the Navigation
Sensor. If the time is not correct, the Navigation Sensor does not have a position fix. This will
also be indicated by the alarm
“Position Data Lost”. This problem is normally caused by a
GPS-antenna failure or damaged antenna cables. This problem may also be caused by
interference from radio equipment on-board.
View Raw Data
The
View Raw Data
view in the R5 SUPREME CDU is used to verify that data is received on
the ports and that the connected external sensors provide the correct sentences.
The view shows the incoming data on the selected serial port. It is possible to pause the data
on the screen by pressing the “Pause” button. Received data during “Pause” will be
