Flarm

FLARM is a traffic awareness and collision avoidance technology for General Aviation, light aircraft, and UAVs. With FLARM installed, you are alerted of both traffic and imminent collisions with other aircraft, so you can take action before it is too late.

Over 35.000 manned aircraft and many UAVs are already equipped with FLARM and the number is rapidly increasing. FLARM systems are available from several manufacturers for powered airplanes, helicopters, gliders, and UAVs.

FLARM works by calculating and broadcasting its own future flight path to nearby aircraft. At the same time, it receives the future flight path from surrounding aircraft. An intelligent motion prediction algorithm calculates a collision risk for each aircraft based on an integrated risk model. When a collision is imminent, the pilots are alerted with the relative position of the intruder, enabling them to avoid a collision.