NORTHROP GRUMMAN Sperry Marine NAVIGAT X MK 2, Assembly Instructions Manual

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NAVIGAT X Mk 2 056341 Rev. AA
1: Description Page 1-1
1 Description
1.1 Design and Main Features
The NAVIGAT X MK 2 is a microprocessor controlled gyrocompass system with
integrated automatic North speed error correction.
The single unit design with a polyurethane hard foam housing allows the gyro-
compass to be installed on any bridge. If required, an optional remote operat-
ing unit may be installed.
The unique method of supporting the gyrosphere by means of mere buoyancy
ensures North stabilization during short power failures. E.g., after a three
minute loss of power, no more than two degrees of deviation may be expected.
Once power has been restored, the gyrocompass will return quickly to the cor-
rect 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 accu-
rate heading and rate of turn data is provided under all operating conditions.
Integrated monitoring of the supply powers, gyroscope current and the follow-
up system ensure secure and trouble-free operation.