Why can't FLARM be used for aerobatic flights?

FLARM has been designed for normal operations, including steep turns. When the aircraft is inverted (e.g. loops, rolls) or when the heading is disconnected from the 3D track (e.g. spins), the collision warning algorithms and relative bearing indications will not be reliable. FLARM should therefore not be used (i.e. turned off) during these maneuvers.