O2 ST50 inputs are control unit, compass
, speed and vmg. No Nav input from a GPS
. Naturally there are also inputs from the fluxgate
as well as rudder
angle. Last sail the compass
was reading about 40 degrees off and when I punched "auto" it went off in its own direction. Back at anchor
I unplugged all connections, cleaned them and sealed with dielectric compound. It works normally now ( at anchor) but I don't trust it. I have read some pretty damning comments on this system and was ready to give up on it. Apologies for hijacking this thread.