Yokogawa Gyro Compass Cmz | 900 Manual

If ship is moving, speed error = (V × cos(TC) × tan(Lat)) / (900 × cos(Lat)) approx.
Some CMZ‑900 versions have a speed‑input terminal (from log) – connect if available.

The CMZ 900 is a north-seeking, electrically supported gyro compass designed for medium to large vessels. Unlike a magnetic compass, which points to magnetic north and is susceptible to deviation from the ship’s steel hull, the CMZ 900 points to True North using the principle of a spinning rotor aligned with the Earth’s rotational axis. Yokogawa Gyro Compass Cmz 900 Manual

Key Technical Specifications (as per the manual): If ship is moving, speed error = (V

The principles are similar to Tokyo Keiki or Sperry MK37. A marine engineer familiar with older gyros can infer 80% of the CMZ 900’s operation. However, specific latitude correction factors remain unique. The CMZ 900 is a north-seeking, electrically supported

If your vessel has a physical copy, consider scanning it immediately. Use a waterproof sleeve and store the PDF on the bridge PC and a separate USB drive.

A common search query is: "CMZ 900 settling time too long." The manual explains the latitude setting procedure. If the latitude potentiometer is set incorrectly, the gyro might take 6 hours to settle rather than the standard 3-4 hours. The manual provides the exact table for setting damping coefficients based on your global position.