TECHNICAL SPECIFICATION • YDK TECHNOLOGIES / YOKOGAWA
CMZ700 SERIES • IMO A.424(XI)
GYROSPHERE KT005 / MKM022
The YDK Technologies (formerly Yokogawa Denshikiki) CMZ700 Gyro Compass is one of the most widely deployed commercial heading systems across the global merchant fleet. Renowned for its rugged gimbal design, superior settling stability, and field-proven reliability, the CMZ700 operates with dual-axis liquid suspension utilizing the famous KT005 Gyrosphere and MKM022 Supporting Fluid. Explore our Yokogawa Marine Gyro Support Desk for survey booking and overhaul kits.
Type KT005
MKM022 / MKM026
MKC320 / MKC321
Less than ±0.3°
1. System Architecture • CMZ700 Major Assemblies
The CMZ700 system is configured into three main modular components:
- Master Compass (MKM022 / MKM026 Container): Houses the inner gimbal, follow-up motor, slip rings, and the suspended KT005 gyrosphere surrounded by damping oil.
- Control Unit (MKC320 / MKC321): Houses the primary power supply PCB (V8113AA), inverter drive, and master CPU board (V8113AB) coordinating heading calculations.
- Operation Display Panel: Provides digital LED heading readout, repeater synchronization controls, and system alarm indicators.
2. Verified Spares & Overhaul Consumables
| Component Description | Yokogawa / YDK Part Number | Recommended Interval |
|---|---|---|
| Gyrosphere Element | KT005 (KT005E exchange) | 3–4 Years (Overhaul) |
| Supporting Fluid & Damping Oil | MKM022 Fluid Kit | 1 Year (Annual Service) |
| Maintenance O-Ring Set | MKM022-Gasket / O-Ring Set | Every Fluid Change |
| Power Supply / Inverter PCB | V8113AA | Exchange / Repair upon alarm |
| Master CPU Board | V8113AB | Exchange / Repair upon alarm |
Get Certified Spares, Overhaul & Port Service
Seanav Marine supplies genuine replacement gyrospheres, supporting fluids, exchange control PCBs, and certified service engineers across UAE, India, Oman, Egypt, Singapore, and global ports.
Seanav Marine Technical Operations Desk
Reviewed by Lead Marine Electronics Engineer & Gyrocompass Specialists • Dubai Maritime City & Global Service Stations • Verified Technical Reference.
