Took the plunge and purchased the 530W. Added it to the panel and everything seems to be working perfectly.... except for OBS mode in GPS.
If I turn the OBS in VLOC mode, all works well.
However, if GPS mode is selected, when I press OBS on the GPS, the course line appears from the waypoint, but turning the OBS knob in the sim, while correctly rotating the course card in the sim, there is no movement of the course on the GPS and thus the needle nor ambiguity indicator move on the VOR receiver.
I've selected all the settings in Panel Instruments but still can't get the GPS to recognize OBS movement.
I'm sure I'm missing something obvious here.
Thanks,
Paul