I am from China. This article was translated by Google. It may cause difficulties in reading. I am very sorry for this.
I made an autopilot boat. When I switch to autopilot mode, my boat will continuously turn in the water. I used an external compass (GPS), but the GPS does not have enough plane to install, so it is tilted（ ≈25 °）. I hope to be informed if this is necessary to set a certain parameter to achieve normal, or other reasons that may cause this kind of problem. I look forward to your help, thank you very much, friends who are far away.
there is a parameter COMPASS_ORIENT to solve this poroblem. but not cover tilte 25.