[CA] [CA11] Serious Evolution / P70 issue

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Graham,

The reported symptom is quite atypical. What is value of the maximum deviation detected by your autopilot (MENU->SET-UP->DIAGNOSTICS->ABOUT PILOT ... scroll to view "Deviation" value)? Has a rudder reference transducer been connected to the autopilot? If so, is it reporting the correct rudder angle? Are there any points of the rudders swing which appear to be dead spots in reported rudder angle (i.e. rudder angle not changing as rudder moves)? What versions of software are installed within the autopilot's EV-1 CCU and ACU?