[DG] [DG11] NMEA 0183 to ST2000 Queston

[nssailor]

Hi Louise,

Thanks for the reply. I am applying -17 to the ST2000 (local variation here in NS is 17W). The boat is on the hard at the moment but the boat fluxgate compass and the compass heading on the ST2000 are within a couple of degrees (and I suspect will match when both are calibrated when the boat is in the water again).
The ST2000 is being fed a bearing to waypoint and distance via the NMEA stream and what is being displayed is the true bearing that the stream is passing. My plotter is displaying magnetic but seemingly will only pass true bearing via NMEA.

To clarify with an example:

Boat fluxgate compass displays heading as 17 deg Mag. ST2000 displays heading as 21 deg Mag (neither has been calibrated recently so I'm sure will match when they are). I put a waypoint in the plotter which is directly in front of the bow of the boat at a distance of 1.5nm. Plotter shows bearing to waypoint on its display as 17 deg Mag; dist 1.5nm. RMB sentence shows bearing to waypoint as 0 deg True; dist 1.5nm. Tillerpilot displays bearing to waypoint as 0 deg; dist 1.5nm.

Does the tillerpilot recognize that the bearing it receives is True? Will it correct it with the variation I have put in via calibration level 9? What should it display?

Colin