With 200 hrs on my SV 10 inch I am noticing at times in flight the PDF heading will differ from the GPS heading by 3 to 8 degrees in straight and level flight. It's intermittent and 90% of the time they match. Might be a dumb question but was wondering why this might be and what would cause it. Back in my round dial days it was common and easy to fix with a reset of the DG for precession. Any advice is appreciated.
p.s. ADAHRS was calibrated via compass rose.
p.s. ADAHRS was calibrated via compass rose.