(DG) Rudder driven hardover to starboard

[Derek - Raymarine - Moderator]

Hi perse111

Thank you for your enquiry.

If this symptom happens when the boat is stationary, then it is likely that the Autopilot is operating correctly, with the boat tied up stationary, if you engage AUTO and select +10, then the Autopilot will initially drive the rudder to Starboard a few degrees - then stop. After about 10-20 seconds, the drive will then 'nudge' all the way over to STARBOARD until the Autopilot is returned to STANDBY. This is Normal, the boat is not turning and so the Autopilot keeps trying to turn the boat until the boat turns and the compass shows some heading change.

If however, the drive moves constantly and at full speed to STARBOARD, this is incorrect and suggest a malfunction.

if this happens whilst the boat is underway, then this also suggests a malfunction.

The next thing to check is the compass operation, click here for test details . If the test is fine, then check for local deviation, , click here for further information , and click here too.

If you can identify the compass is at fault, this will need to be replaced, otherwise the ST5000 control unit is defective and must be returned to a Raymarine workshop for further investigation.

regards