The Tour de France 2020 helicopter, an Aérospatiale AS-350 BA Ecureuil with tail number F-GKMB, has been equipped with a PowerFLARM collision avoidance system (in French) to protect it from mid-air collisions with the many aircraft in the area. The PowerFLARM can warn not only about collisions with other FLARM equipped aircraft but also with ADS-B Out and transponder equipped aircraft.
FLARM is already mandatory in France for gliders and a mandate for other GA aircraft is under investigation.
