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.
Regulations in many countries require unmanned aircraft to be identified remotely by electronic means, in combination with a UAS registry database. The benefits include public security, safety, and accountability. The only open standard referenced by authorities globally is the “FLARM UAS Electronic ID” standard. It builds on the existing FLARM protocol layers with tens of thousands of airborne installations. It is designed for simple and cost-efficient implementation in higher volumes by professional manufacturers.