If ADS-B/In provides the 3D information, which is next used in a variety of softwa ForeFlight, iFlyGPS, XCSoar (pending, hopefully), what can stop the programmers to calculate potential collisions and give similar alerts to those of FLARM? Isn't it all about universality of the system and availability of reliable data between ALL users of the airspace: powerplanes, gliders, trikes AND drones?

Tom BravoMike