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Sperry Marine
NAVIGAT X MK 1

NAVIGAT X MK 1

Product catalog summary

Overview
The NAVIGAT X MK 1 is a digital gyrocompass system designed by Northrop Grumman Sperry Marine to meet the evolving demands of 21st-century navigation and ship control technology. It features easy installation with direct cable connections and plug-in electronic modules for quick servicing. The system provides digital heading information via a 13-bit shaft encoder and includes a control and display unit that can be relocated if necessary.

Standard Features

Single-unit design with a control and display unit featuring a 4-digit heading display and 6 operating keys.
High-speed follow-up system at 100°/sec and type-approved rate-of-turn output.
Automatic static north speed error correction and highly accurate digital heading data transmission.
Self-synchronizing repeater compasses and electronic alignment error correction.
Capability to drive up to 12 analogue repeaters and includes a 180° heading offset function for shuttle vessels.
Automatic emergency power changeover and status alarm with 7 independent serial outputs.
Complies with IMO regulations and outputs to a Navigation Data Printer.
Twin rotors and liquid damping system to eliminate latitude error, with a high MTBF of 40,000 hours.
Gyro system remains north stabilized during power interruptions up to 3 minutes.

Type Approval
The NAVIGAT X MK 1 is type approved by Germanischer Lloyd (GL) under the Marine Equipment Directive (MED) 96/98/EC and complies with various IMO resolutions and IEC standards. A special version, NAVIGAT X MK 1 HSC, is available for high-speed craft.

Performance

Linear mean settle point error (RMS): ≤0.1° secant latitude.
Static error (RMS): ≤0.1° secant latitude.
Dynamic error (RMS): ≤0.4° secant latitude.

Power Requirements
The system operates on 24 VDC (18-36 V) and/or 115/230 VAC ± 10% at 50/60 Hz, with automatic switchover to 24 V emergency power.

Operational Data

Ambient temperature range for operation: -10°C to +55°C; storage: -25°C to +70°C.
Settling time: < 3 hours; follow-up rate: 100°/sec.
Power failure alarm with visible and audible alerts.
Mean time between failures: 40,000 hours.

Power Consumption

DC start-up: 80W; operation: 45W.
AC start-up: 125VA; operation: 75VA.

Protection Grade
The gyrocompass is rated IP 23 according to IEC/EN 60529.

Environmental Requirements & EMC
Complies with EN 60945 standards, with specified magnetic clearance requirements.

Remote Control and Display Unit
Includes various inputs and outputs for position, speed, rudder angle, and rate of turn, with multiple output formats for gyrocompass heading and other data.

Catalog excerpts

NORTHROP GRUMMAN Microprocessor Controlled Digital Gyrocompass System

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Design and Standard Features OVERVIEW With a watchful eye on the demands made on navigation and ship control technology emerging from the 21st Century, Northrop Grumman Sperry Marine has created the NAVIGAT X MK 1 Digital Gyrocompass System. Ship’s cables are connected directly to terminals within the gyrocompass housing, greatly facilitating installation. All electronic components are plug-in modules, thus providing fast and easy service. Digital heading information is derived as an absolute value from a 13-bit shaft encoder. The NAVIGAT X MK 1 has a control and display unit installed in the...

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System Configurations Dual Gyrocompass System with TMC* Function Basic Single Gyrocompass System Single Gyrocompass System with TMC* Function Switch-Over Unit Transmitting Magnetic Compass with Fluxgate NAVITWIN IV Heading Management System ** Heading Diff Alarm Off Heading Alarm Triple Gyrocompass System with TMC* Function Switch-Over Unit 2 Outputs Transmitting Magnetic Compass with Fluxgate NAVITWIN IV Heading Management System ** Heading Diff Alarm Off Heading Alarm *Transmitting Magnetic Compass. In TMC systems, the NAVITWIN IV Heading Management System provides an independent back-up magnetic...

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OPERATIONAL DATA NAVIGAT X MK 1 Power Failure Alarm: visible and audible and potential-free contact, max. 30 VDC / 1.0 A, max. 125 VAC / 0.5 A Mean time between failure: 40,000 hours (MTBF) North speed error correction: automatic or manual Built-in test equipment: standard POWER CONSUMPTION Speed: 1 input IEC 61162-1 or 200 pulses/nm Start-up: Operation: Each analogue repeater: Each universal digital repeater: Rudder angle: 2 analogue inputs from feedback unit Rate of turn time constant: 1 input from external selector External mute Power 24 VDC (18-36 VDC) backup supply PROTECTION GRADE Gyrocompass:...

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