TACS are movable panels, similar to flaps or ailerons, on the trailing edge of the wing extension.[41][42] The system is controlled by the aircraft's electrical system and a high-speed servo which is activated when the aircraft senses an oncoming stress event, essentially simulating an actuating wingtip. However, the wingtip itself is fixed and the TACS are the only moving part of the wingtip system. Tamarack first introduced ATLAS for the Cessna Citation family aircraft,[41][42] and it has been certified for use by the Federal Aviation Administration and European Union Aviation Safety Agency.[43][44]