User's Manual

NACOS Platinum
ED 3100 G 110 / 02 (2011-10)
Operating Instructions
A-1 General Information
A RADAR.fm / 10.11.11
A-10
Safeguards
The following table gives an overview about the failure modes and the respective system status as well
as possible measures supporting maximum system availability.
Table A / 3 RADAR Failure Modes
As shown in the above table in case of an installation with two or more radar systems each system is
working independently from the other one, a failure in one system does not affect the operation of the
other systems. Each system can work as stand-alone radar without changing any configuration settings.
Failure description Status Measure and Result
Antenna Unit (antenna, gearbox or
transceiver) inoperable or defective
This antenna / trans-
ceiver cannot be selected
by any MFD any more
RADAR operation with all other
installed Antenna Units is still avail-
able
Display Electronics (MFD-PC) inoperable
or defective
One of two (or more)
radar indicators is not
available
Operate X- or S- Band radar via the
secondary or any other still available
MFD
Display Monitor inoperable or defective
RADAR Keyboard inoperable or defective RADAR indicator remains
available
Operate the MFD with on screen
commands and Track ball only; full
operating level is available
Trackball inoperable or defective Limited basic radar operation via the
keyboard remains available
Network Switch or its power supply
defective
RADAR indicator and
connected transceiver are
not available
Operate another X- or S- Band radar
via the secondary or any other still
available MFD
Sensor Interface, i.e. Data Processing
Unit (DPU), Data Communication Unit
(DCU) or its power supply defective
All radar indicators and
transceivers remain avail-
able
System automatically activates the
secondary DPU or DCU, the main
navigation sensors (for HDG, SOG,
POSN) remain available.
In a double installation, one of the
transceivers is inoperable or defective
The transceiver is not
available
The remaining transceiver
1)
can be
set as slave on the second indicator;
picture is visible at both indicators.
1)
If one of the sensor signals is missing, that navigation data are derived from one of the other sensors
as far as possible, either automatically or manually. For details please refer to chapterSee chapter III
- 3.2 on page 33
In a double installation, one of the MFDs
is inoperable or defective
The system cannot be
controlled by this MFD
any longer
Both transceivers can be controlled
with the remaining MFD unit; both
radar pictures can be observed sepa-
rately
In a double installation, "No RADAR
Video" alarm is shown
The actual transceiver is
not available
2)
2)
Transmission of the radar video from a connected transceiver to the MFD is monitored continuously.
If the connection to the transceiver is disturbed or completely lost, the respective alarm messages
describing the reason for the fault are given (See chapter A - 7.15 on page A-81 for details). If the refresh of
the radar video is not possible, the alarm No RADAR Video is issued; the video in the PPI is cleared and will
no longer be updated.
Switch to the remaining transceiver
In a multiple transceiver installation,
one of the transceivers is inoperable or
defective
The transceiver is not
available
Remaining transceivers can be set as
slave on one of the other indicators,
picture is visible on all indicators.
In a multiple transceiver installation,
one of the MFDs is inoperable or defec-
tive
The system cannot be
controlled by this MFD
any longer
All remaining transceivers can be
controlled with the remaining indi-
cator electronics units, all radar
pictures can be observed separately.