UAV Common Automatic Recovery System (UCARS) is a ground-based radar system that tracks the unmanned aerial vehicle and feeds positioning commands to the ground control station to maneuver the aircraft. This recovery system is the precursor to the Tactical Automatic Landing System (TALS) currently being used in the Army's Shadow 200 UAV. Sparks, Nev.-based Sierra Nevada Corporation developed both UCARS and TALS. The system was recently tested with TRW/IAI Hunter UAV.