[DG] [DG11] NMEA 0183 to ST2000 Queston

[nssailor]

Hi again Louise,

Unfortunately, it is not behaving as you suggest. I took the magnetic variation out of the tillerpilot, depowered and repowered, and it still displayed 359 degrees (as it did before taking it out). I also put the variation back in. In all circumstances it displayed 359 deg as bearing to waypoint which was the true bearing. I've also attached the sentences that are on the network. The RMC sentence is only displaying true bearing (not magnetic) and I don't believe there is any way to change that.
I'm puzzled that there is no change on the tillerpilot whether the variation is programmed in or not.
-17 programmed in does not subtract 17 from the bearing supplied. It just indicates that magnetic north is west of true north. In fact, it should then add 17 to the true bearing.

Colin