On Saturday, November 22, 2014 5:15:04 AM UTC-5, Z Goudie wrote:

Remember, if you're flying too slowly into a strong headwind in wave and
thus proceeding backwards over the surface of the earth, when Flarm calls a
conflict at 12 o'clock it's behind you....

So more generally, 12 o'clock on the Flarm warning circle aligns with bearing rather than heading?