NORTHROP GRUMMAN NAVITWIN IV, Руководство по эксплуатации, установке и обслуживанию

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056360/E NAVITWIN IV
viii
General Safety Information for the Operator
WARNING
Risk of misusage
Before using the NAVITWIN IV system, operators must be appropriately
trained and familiar with all operating procedures and safety instruc-
tions contained in this manual. The manual is to be completely read
before the first usage of the NAVITWIN IV system.
Keep all system manuals in a well-known, readily available location
WARNING
Limited data accuracy during settling time
NAVITWIN IV permits to activate a heading source as soon as valid
heading data is received from the respective device.
Make sure that a gyrocompass has settled before using its heading as
the reference for heading control systems, RADAR, ECDIS, etc.
A magnetic compass heading source should be made the active refer-
ence only in case of failure of the gyrocompass(es).
CAUTION
Risk of erroneous operating conditions through inaccurate alignment
When the NAVITWIN IV is used in a system with the fiber-optic gyrocom-
pass NAVIGAT 2100 / NAVIGAT 3000:
At each new alignment (restart) of the NAVIGAT 2100 / NAVIGAT 3000,
make sure that the FOG aligns correctly, using valid speed and position
data.
The correctness of speed and position data must always be confirmed at
the respective FOG CDU each time a new alignment is carried out.
CAUTION
Risk of erroneous operating conditions through inaccurate error alarm
recovering
When acknowledging an external alarm from a NAVIGAT 2100 /
NAVIGAT 3000, make sure that the FOG fully recovers from the error.
Upon alarm acknowledge, the NAVIGAT 2100 / NAVIGAT 3000 executes
the command which corresponds to confirming the alarm message, i.e.
pressing the
F1 key, at the compass.
In certain cases, it may be necessary to take further action to return the
NAVIGAT 2100 / NAVIGAT 3000 to normal operation, e.g. it might be
required to change the speed or position data source or to execute a new
align (restart) of the system.
CAUTION
Risk of erroneous CAM handling
Selecting ALR for the ALARM SELECT setting of RS-422 output 2 AND 3
simultaneously, will result in erroneous CAM handling.
Newer select ALR for the ALARM SELECT setting of RS-422 output 2 AND
3 simultaneously.
Always make sure to either select ALR for the ALARM SELECT setting of
RS-422 output 2 OR RS-422 output 2, and to select OFF or PPLAA/PPLAB/
PPLAD for the remaining RS-422 output.