Compass issue

[Chuck - Raymarine - Moderator]

Gary,

E90W is the model of multifunction display which has been installed onboard the vessel. An autopilot generally consists of the following components:
- autopilot control head (ex. ST70, ST6002, p70, etc.) ... through which the user enters autopilot commands
- autopilot course computer (ex. SPX30, S3G, EV-1/ACU-200, etc.) ... receives input form autopilot control head, heading sensor, rudder reference, and then powers the actuator to steer the vessel)
- actuator (mechanical linear drive, type 1 hydraulic pump, wheel drive, etc.) ... moves rudder in the direction required to steer the vessel

The autopilot course computer is generally designed to be mounted to a vertical bulkhead.