Buying a Used Gyro Compass: Checklist

When buying a used gyro compass, verify gyrosphere service history, bearing replacement, electronics overhaul certificate, calibration run-up chart and class-society documentation. Reputable suppliers ship with all five.

Frequently asked questions

What's the most important item on the checklist?

Gyrosphere service history. The gyrosphere is the most expensive single component and determines the unit's remaining life.

How long does an overhaul take?

3–4 weeks standard; rush 10–14 days available.