SPERRY NAVIGAT X MK 1

Digital Marine Gyrocompass System.

With an eye on the fast approaching shipboard navigation and control system technologies of the 21st century, C. Plath has created a generation of advanced digital marine gyrocompasses: NAVIGAT X MK 1.

Ship's cables are connected directly to terminals within the gyrocompass'shousing, 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 12 bit shaft encoder. The NAVIGAT X MK1 Mod. 10 marine gyrocompass has a control and display unit installed in the front access cover. When required, the control and display unit can be removed from the gyrocompass housing and installed at a location (e.g. bridge console) remote from the gyrocompass.

The unique method of supporting the now enhanced well-proven C. Plath gyrosphere by means of mere buoyancy ensures north stabilization during short power failures. For example, after a three minute gyrocompass power failure, no more that two degrees of deviation may be expected. Once power has been restored, the gyrocompass will return quickly to the correct heading without requiring the usual settling period. The combined effect of the twin rotors and the liquid damping system prevent latitude error.

For operation in extremely heavy seas where highly accurate heading information is absolutely essential, the NAVIGAT X MK 1 Mod 7 marine gyrocompass, equipped with a special gyrosphere container, is recommended. Here, the unique centering pin retaining arrangement for the gyrosphere is mounted in an additional gimbal system, which allows the NAVIGAT X MK 1 Mod 7 marine gyrocompass an almost unlimited freedom of roll and pitch (±90°).

NAVIGAT X MK 1 marine gyrocompass has been type approved in accordance with EC Council Directive 96/98/EC by the German Federal Maritime and Hydrographic Agency (BSH).

Features

• Comprises one single unit
  
• Control and display unit in front cover with 4-digit heading display and 6 operating keys
  
• Easy to install and easy to service High-speed follow-up system 100°/sec
  
• Rate-of-turn output
  
• Automatic static north speed error correction
  
• Integrated TMC interface
  
• Compass monitor function
  
• Highly accurate digital heading data transmission by shaft encoder
  
• Self-synchronizing repeater compasses
  
• ±180° electronic alignment error correction in setup program
  
• Can be installed at any location
  
• Will drive a maximum of 12 analogue repeaters
  
• 180° heading offset function for shuttle vessels
  
• Seven independent serial outputs RS 422 and NMEA 0183
  
• Two independent 6 steps/degree heading outputs (0.5 A)
  
• Complies with IMO regulations A.424(IX), A.574(14), A.821(19) - HSC (High-Speed Craft) and ISO 8728
  
• Outputs to Voyage Data Printer:
  - Heading
  - Heading source gyro/magnetic
  - Rudder angles of two independent rudders
  
• Complies with DNV-W1
  
• Insensitive to horizontal acceleration
  
• Twin rotors and liquid damping system eliminates latitude error
  
• High MTBF (mean time between failures) and low power consumption
  
• All repeater compasses with serial interface
  
• Automatic emergency power changeover and status alarm
  
• Gyro system remains north stabilized during power interruptions of up to 3 minutes
  
• Single point suspension of the gyrosphere container eliminates the well-known adverse effects associated with gimbals
  
• Monitoring and alarm functions for all voltages, gyroscope current and follow-up system

Optional

• Automatic dynamic north speed error correction
  
• Remote control unit Compass Monitor NAVITWIN III for additional operational convenience
  
• Magnetic compass with fluxgate
  
• Analogue and digital repeaters
  
• Voyage Data Printer NAVIPRINT
  
• Conventional, adaptive and high-speed code autopilots
  
• Rudder angle feedback units
  
• Electromagnetic speed log
  
• Electronic compass with NMEA 0183 interface

Gyrocompass Inputs & Outputs for all Basic Systems

Inputs

• Position lat/lon in NMEA 0183*
  
• Speed in NMEA 0183 or 200 pulses/nm*
  
• Rudder angle, analogue
  
• Rate-of-turn time constant from external selector
  
• Sine / cosine from magnetic compass fluxgate
  
• Heading in NMEA 0183 from electronic compass
  
• Steering mode status (auto/man) from selector switch
  
• Power supply 115 - 230 VAC and/or 24 VDC

Outputs

• 12 heading outputs in NMEA 0183 to serial repeaters
  
• 2 outputs NMEA 0183 speed, magnetic heading
  
• 2 outputs RS 422 gyro heading, ROT, lat/lon
  
• 1 output heading, ROT in RS 422 FAST
  
• 1 output heading, ROT in RS 422 SUPER FAST
  
• 1 output status signal
  
• 1 rate of turn
  
• 1 output RS 422 to Voyage Data Printer with heading, rudder angle, time, lat/ lon, steering mode, speed
  
• 1 output status gyro/magnetic
  
• 2 6 steps/° heading outputs (0.5 A)

*Required for automatic north speed error correction only.

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