Gyro Compass | Yokogawa

| Feature | Yokogawa YG-500 | Fiber Optic Gyro (FOG) | Ring Laser Gyro (RLG) | | :--- | :--- | :--- | :--- | | | Yes (spinning mass) | No | No | | Warm-up Time | 2–3 hours | < 10 minutes | < 15 minutes | | Maintenance Cost | Moderate (bearing change) | Very Low | Low | | Initial Cost | $8,000 – $12,000 | $15,000 – $25,000 | $25,000+ | | Accuracy | Excellent | Superior (0.1°) | Superior (0.05°) |

The Yokogawa CMZ900 series is the most prominent lineup in the company's portfolio. It is type-approved to International Maritime Organization () and JIS-F9602 Class A standards. Gyrocompass | SBG Systems yokogawa gyro compass

This report is for informational purposes. Always refer to the official Yokogawa Installation & Operation Manual for specific vessel applications. | Feature | Yokogawa YG-500 | Fiber Optic

| Interval | Task | | :--- | :--- | | | Verify heading against magnetic compass or GPS (at known location). Record settling time. | | Monthly | Clean air filters on master compass. Check for oil leakage around gyrosphere housing. | | 6 Months | Measure motor current and temperature. Test battery backup (if fitted). | | Annually | Calibrate repeater synchronization. Update firmware (Yokogawa service tool required). | | 5 Years / 25,000 hrs | Replace gyrosphere bearing assembly (authorized service center). | Always refer to the official Yokogawa Installation &

The North Atlantic was a wall of gray slate, but inside the bridge of the M.V. Kestrel , the glow of the was the only horizon that mattered. While the magnetic compass on the wing was dancing wildly, jittered by the massive steel hull and the electrical hum of the cargo hold, the Yokogawa sat silent and resolute.