My wife asked if we need a compass in the Pipistrel Sinus since we received
one in a box of stuff and none is installed in the aircraft. I told her I'd
check the flight manual. Under "Minimum Equipment" it states that a
"Compass" is required - it does not state that a "Magnetic Compass" is
required.

So... Is a GPS suitable? It has a north arrow and displays track. I don't
want to call the FSDO... I suppose I could carry an artillery compass in my
pocket!