FLARM is based on cooperative exchange of digital data through radio communication, similar to ADS-B. Devices measure position and predict the aircraft’s trajectory. This is broadcast using a digital, encrypted radio channel. Devices in other nearby aircraft receive the data and compare it to their own predicted trajectory to assess the risk of a collision. If a dangerous situation is detected, an alert is issued in both aircraft so the situation can be resolved by the pilots.
Due to the cooperative exchange of data amongst the devices, compatibility is critical: each device needs to speak the same language in order to be interpreted correctly. Innovation and improvements must happen while retaining full compatibility of the complete population at all times.
For in-depth information, please read the white paper explaining FLARM’s system design and compatibility framework.
The technology is extensively licensed to other manufacturers, thus the FLARM population today is very diverse: FLARM-compatible devices are used in gliders, powered airplanes, helicopters, military aircraft, hang-gliders, paragliders, r/c aircraft, and drones. There are currently nine independent manufacturers offering FLARM-compatible products for a wide range of applications.
Manufacturers wishing to produce their own FLARM-compatible devices should contact us.