Sperry Marine 4914-CA, Operation, Installation And Service Manual

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The NAVIGAT X MK 1 is a digital gyrocompass system for the maritime
navigation of vessels and must be operated only from appropriately
trained and educated personnel familiar with all mandatory safety and
operating procedures.
The NAVIGAT X MK 1 provides North-speed error corrected true heading
data as well as rate of turn (ROT) data for the navigation of maritime
vessels.
The NAVIGAT X MK 1 can operate as a standalone system or as part of a
multi gyrocompass system environment (Heading Management Sys-
tem, HMS).
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The NAVIGAT X MK 1 and/or the provided true heading and ROT data of
the NAVIGAT X MK 1 are not allowed to be used for the navigation of
inland water vessels and river boats. Any exception to this restriction
must be regulated by specific certification of an entitled organisation or
administration, for further details see certification information under
”Design and Main Features” on page 1-6 and ”Marine Equipment Direc-
tive EC Declaration of Conformity” on page 1-17.
Although the NAVIGAT X MK 1 is a highly accurate system for providing
true heading and ROT data, operators must not rely on it solely as the
only heading source. The plausibility of the NAVIGAT X MK 1 heading
and ROT data and the speed and position input data (as secondary data)
must always be confirmed against all other available aids to navigation.
Since the NAVIGAT X MK 1 system can additionally be used for display-
ing secondary navigation data (speed and position input data) gener-
ated from other connected devices, the operator must not take
displayed secondary data for granted and is obliged to confirm the
validity of secondary data independently.
When navigating in polar waters (according to E190E IMO Guidelines
definition), the heading information of the gyrocompass may become
unstable/unreliable, due to physical principles, resulting in possible
deviation. For safe steering of the vessel in polar waters, the heading
information of the gyrocompass may therefore not be used and heading
information of a GNSS (Global Navigation Satellite System) compass be
preferred instead.