Idiens tell me more about this new autohelm with mast head sensor. numbers etc. if you can that would be greatly appreciated.
Well, I meant new in the sense of un-used. It is a later model of the Autohelm 3000 that I have, both have been discontinued I believe. The older model has four separate sockets for power, actuator, wind and remote control (?). The newer model only has power and actuator connections, but the power connection has three pins and the negative and third pin form a data link. SD- may be right that it is only SeaTalk, but I seem to remember the handbook said NMEA, so that it could take desired heading from several sources, for example GPS. If they had meant only SeaTalk they might have provided the standard connector for that, instead of a wire-it-yourself solution. But I will check next time - the handbooks are on the boat.