DEVICE: GYROCOMPASS, OPERATOR UNIT, CONTROLLER BOX
BRAND: YOKOGAWA / YDK
TYPE: CMZ-900
Yokogawa CMZ-900 Gyrocompass — Operator Unit & Controller Box
Overview
The Yokogawa CMZ-900 series is a highly reliable, IMO-approved gyrocompass system (Resolution A.424(XI), JIS-F9602 Class A) designed to provide accurate true-north heading by using a fast-spinning, suspended rotor influenced by Earth’s rotation . The Operator Unit & Controller Box forms the interface module enabling control, signal distribution, and integration with external navigation systems.
Key Features
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Modular Compact Design
Allows integration into an autopilot steering stand, optimizing installation space on the bridge -
High-Speed Serial Data Output
Supports IEC 61162-2 format for fast delivery of heading and rate-of-turn (ROT) data -
Manual & Automatic Speed Error Correction
Enhances navigational accuracy by compensating for the ship’s speed; manual adjustment is available as needed -
External Heading Sensor Backup
Integrates external sensors (like GPS or magnetic compasses) to serve as redundant heading sources for enhanced reliability -
Advanced Anti-Vibration System
Features a specialized damping mechanism using high-viscosity oil to minimize shock and vibration effects—essential for rough sea conditions and fast maneuvering vessels -
Easy Maintenance with Long Intervals
The gyrosphere housing uses a titanium capsule with durable electrodes to preserve purity and reduce maintenance frequency. The lower container is designed to facilitate emergency gyrosphere replacement by ship crew -
Configurable Restart Timer
Allows automatic restart timing configuration between 1 to 99 hours, aiding in maintenance scheduling and system readiness
Technical Brief
| Specification | Details |
|---|---|
| Power Supply | 24 V DC (20–30 V) and/or 100–220 V AC (single-phase with optional MKR027 adapter) |
| Output Signals | Heading, ROT: serial (IEC 61162-1/2), analog outputs, stepper motor drive, repeater compass interfaces |
| Performance Accuracy | Static: ±0.25° × sec Lat; Dynamic: ±0.75° × sec Lat; Follow-up accuracy: ≤0.1°; Max follow-up speed: 30°/s |
| Environmental Resilience | Roll/Pitch tolerance ±40°; Vibration: up to 50 Hz with minimal displacement; Operating temp: –15°C to +55 °C; Rapid start-up after power loss |
Ideal For
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Merchant vessels, offshore platforms, and marine operations that demand high-precision heading data.
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Integration into modern autopilot systems and centralized bridge control systems.
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Scenarios requiring flexible installation, signal redundancy, and simplified upkeep.
