Hi John,

I am still in the dark about the actual implementation. As I asked before via mail what is your position on the following features of XCSoar:

* AH based on GPS/Vario/Airspeed
* AH based on internal/external gyro (forbidden, but not implemented in any version of XCSoar yet)
* METAR download (forbidden, right? how is it different from requesting it via VHF?)
* Live Tracking via 3G/4G (only upload, no download)
* Flarm radar functionality

Does the application need to make sure that data/voice services are not used? Is it enough to enable the plane mode in the smartphone? I wouldn't know how our software should be able to block incoming voice calls which are not part of our software...