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

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The NAVIGAT X MK 1 is a microprocessor controlled marine gyrocom-
pass system with integrated automatic North speed error correction.
The NAVIGAT X MK 1 has been type approved by Germanischer Lloyd
(GL), in accordance with the Marine Equipment Directive (MED) 96/98/
EC, as amended, as
gyrocompass (certificate no. 94 418-10 HH),
gyrocompass for high speed craft (HSC) (certificate no. 94 428-10 HH)
and rate of turn indicator (ROTI) (certificate no. 94 424-10 HH).
The NAVIGAT X MK 1 Type 4914 CA complies with the following speci-
fied standards as gyrocompass:
IMO resolutions A.424(IX), A.694(17), MCS.191(79), ISO 8728(1997, IEC
60945(2002), IEC 62288(2008) and IEC 61162 series.
The NAVIGAT X MK 1 HSC-version Type 4914 CC (stock no. 74811) with a
specially selected gyrosphere complies with the following specified
standards as gyrocompass for high speed craft (HSC):
IMO resolutions A.821(19), A.694(17), MSC.36(63), MSC.97(73),
MSC.191(79), ISO 16328(2001), IEC 60945(2002), IEC 62288 (2008) and
IEC 61162 series.
The NAVIGAT X MK 1 Type 4914 CA and NAVIGAT X MK 1 HSC-version
Type 4914 CC comply with the following specified standards as rate of
turn indicator (ROTI):
IMO resolutions A.526(13), A.694(17), MSC.36(63), MSC.97(73),
MSC.191(79), ISO 20672(2007), IEC 60945(2002), IEC 62288(2008) and IEC
61162 series.
The NAVIGAT X MK 1 has been type approved by the
Russian River Register (RRR) for the purpose of provision of navigation
safety of inland navigation and river-sea going vessels and has been
assigned certificate 190-06-3.1.1.
For further details see “Marine Equipment Directive EC Declaration of
Conformity” on page 1-17.
The single unit design with a polyurethane hard foam housing allows
the gyrocompass to be installed on any bridge. If required, the operating
unit may be installed at a location remote from the compass or an addi-
tional remote operating unit may be used.
The unique method of supporting the gyrosphere by means of mere
buoyancy ensures North stabilisation during short power failures, e.g.,
after a three minute loss of power, no more than two degrees of devia-
tion may be expected. Once power has been restored, the gyrocompass
will return quickly to the correct heading. The combined effects of the
twin rotors and the liquid damping system virtually eliminate latitude
error.
Heading is measured as a 13-bit absolute value with a digital shaft
encoder. The high-speed follow-up system (follow-up speed up to
100°/s) ensures that accurate heading and rate of turn data is provided
under all operating conditions. Integrated monitoring of the supply pow-
ers, gyroscope current and the follow-up system ensure secure and
trouble free operation.