On Wednesday, May 27, 2015 at 7:46:25 PM UTC-7, pcool wrote:

The assumption is that the glider in thermal with you, or arriving in front
of you, has a device with the same protocol.
In the alps this is no more granted. This is what this thread is about.

Wow, why would people buy an incompatible device when there are multiple manufacturers of compatible devices in the market?