Originally Posted by Hakan
It's most likely that your newer AP has another setup, through. But just for eliminating - if your filter is exactly as of your text I should have tried the more specific ECRMB and ECRMC instead. Then it will filter out RMBs and RMCs from other sources then OCPN.
I apologize for being imprecise, Håkan. I should have written ECRMB, ECRMC, and ECAPB -- these are, in fact, the output sentences I have configured in OCPN. (And also in PolarView/PolarCOM, the other nav program I tested.)
I can monitor
the data output from OCPN and input to the AP, and these are the only 0183 sentences that the AP sees. My configuration is complicated, however, by the fact that the AP also gets data (PGNs) from a SimNet (NMEA 2000) network.
PolarCOM outputs Magnetic bearings, and the AP works;
OCPN outputs True bearings, and the AP does not work.
My conclusion is--regardless of how my TP32 AP gets its bearings--via the 0183 APB or the N2K PGN 129284, or both--the TP32 will only function (to follow a route) if the bearing data is in Magnetic.
If you're interested, you might also look at the discussion in the parallel thread NMEA 2000 quandry
By the way, I see you're from Orust -- quite close (well, relatively speaking) to Ödenäs where my grandfather was born and raised!