Right then, since my last flight detailed in my OP here I went on holiday and took a FAA flying manual with me and boned up on basic NAV. Still can’t figure out compass and Garmin 30 degree difference thing.
So I flew from Forfar to Plockton today and upon the return leg I plugged in “direct” to Forfar and this time the compass and DG sat at 090 while the Garmin gave me a course and track of around 120 consistently (which is a 30 degree swing in the opposite direction from the compass/garman differential on the OP trip) Again there were very little winds if any, and I verified that the Garmin is set for Magnetic Variation Auto”
So I'm buggered if I know what it is.
Last edited by piperboy84; 27th February 2013 at 17:06.