[CA] [CA11] ST80 compass testing

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum jlukey,

Based upon the symptoms reported, it the ST80 compass is beginning to fail. Unlike the M81190 Fluxgate compass, there are no tests which one may perform to the ST80 Compass. Unlike the M81190 Fluxgate compass (shown below), the ST80 Compass (shown below it) is designed to support NMEA 0183 or SeaTalk communications rather than analog signals. The M81190 Fluxgate compass is designed to be interfaced to the autopilot course computer's Compass terminals and is designed to be calibrated and aligned via the autopilot's control head. It is recommended that the ST80 Compass be replaced with the M81190 Fluxgate compass and that it then be calibrated and aligned per the autopilot's instruction guide.