[CA] SPX30 Doing Poorly in Track Mode

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum DSanduril,

The description which you have provided is consistent with the design of a SPX autopilot when Track mode is initiated. Unlike Auto mode, which is designed to maintain a specific heading, Track Mode will attempt to maintain the vessel within a corridor extending either side of the course line. The width of this corridor will be based upon the autopilots Response Level setting. This feature supports nine settings. Should the value of this setting be configured to 1, then the autopilot will maintain a looser course, while a setting of 9 will permit the tightest course to be maintained. Having a properly functioning rudder reference transducer is also important to the operation of this feature. As the function of the autopilot is to keep the vessel within aforementioned corridor, it is normal for the track to appear as an elongated S.