On Wednesday, October 24, 2012 12:26:44 PM UTC+2, Chris Nicholas wrote:
Just in case this too is not obvious, bear in mind that if you are in high speed wave or ridge, and fly into wind slower than the wind speed, you will go backwards. So Flarm’s “12 o’clock” is behind you, in your visual 6 o’clock. Bearings/azimuth to other contacts will be related to that..

That is true. The effect is also an issue with crosswind. Flarm may show you a 10 o clock alert for an 11 o clock target.
- Folken