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Yokogawa Denshikiki Co., Ltd.




This type is suitable for all kinds of merchant vessels. Various types of signal outputs are available.



  • The system configuration can easily be adapted to each vessel's specifications.
  • IEC 61162-2 high-speed code is available for the heading and rate of turn (ROT) outputs.
  • A unique anti-vibration system enhanced by the velocity damping effect of high viscous oil, provides superior damping of vibration and decoupling of shock at sea.
  • A small and lightweight container enhances the follow up speed. The gyrocompass changes smoothly and does not lag when a small vessel rapidly changes course.
  • A space-saving design: the master compass and the control box can be installed on the autopilot stand.
  • Automatic speed error correction is possible if both the ship's speed signal from the speed log and the latitude signal from a GPS or some other positioning device is available. Further, the latitude can be estimated from the ship's speed and the gyrocompass reading if the positioning device signal is absent.
  • An external heading signal from an instrument such as a magnetic compass or a GPS compass can be passed to repeater compasses and other ship equipment for back-up purposes.
  • As a standard function, a built-in monitor detects deviations between the master compass and external sensor heading readings.
  • The restart time can be preset from 1 to 99 hours.
  • Bridge Alert Management System (BAMS) interface function based on IEC62288 Ed.2.
CMZ900S System Descriptions


Settling Time
and Accuracy
Settling time Within 5 hours
(Operational state is reached in about 2 hours)
Accuracy Static: ±0.25 deg.x sec (Latitude)
Dynamic: ±0.7 deg.x sec (Latitude)
Follow up accuracy 0.1 deg. or less
Max. follow up speed 30 deg./s

(Normal use)

Permissible angle ±40 deg.(Roll), ±40 deg. (Pitch)
Ambient temperature -10 deg.C to +55 deg.C
Power Supply Main 100V/110V/115V/220V AC 50/60Hz single-phase
24V DC (For back up power)
Alarm 24 V DC
Signal Inputs Automatic
speed error correction
Latitude: IEC61162-1 (NMEA0183) 1 circuit

Ship's speed: 200 P/nm or IEC61162-1

1 circuit
External heading IEC61162-1 (NMEA0183) 1 circuit
Signal Outputs Heading data for repeater compasses 8 circuits
Heading data for steppers 4 circuits
Serial data IEC61162-1 1 circuit
IEC61162-1/-2 selective 2 circuits
Analog heading data Heading signal 1 circuit
Quadrant signal 1 circuit
Turn rate signal 3 circuits
Gyro. running (Close contact when running) 1 circuit
Alarms (Open contact
when abnormal)
System failure 1 circuit
Master compass failure 1 circuit
No voltage 1 circuit
Heading deviation signal (Close contact when excessive) 1 circuit
Type Approval Japan(JG)
CMZ900S System Descriptions


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