Dynon Avionics EFIS-D100 Pilots Users Guide - Manual (Page 14)

Product Overview
EFIS-D100 Pilot’s User Guide 2-5
this sequence of event occurs, the EFIS-D100’s attitude accuracy is reduced; use other references in the aircraft to cross-
check against the EFIS-D100’s attitude.
COMPASS ACCURACY AND AUTOPILOT PERFORMANCE
If you are using your EFIS-D100 to control Dynon’s Autopilot, it is critical that the magnetic heading be as accurate as
possible for comfortable operation in HDG mode and radio-based VOR/NAV mode. The aircraft’s compass must be
installed correctly, calibrated, and operating well in all attitudes.