{| |} The General Atomics GNAT is a reconnaissance UAV developed in the United States in the late 1980s and manufactured by General Atomics Aeronautical Systems Inc. (GA-ASI). As initially designed, it was a simplified version of the LSI Amber intended for foreign sales. The Gnat 750 made its first flight in 1989. The Gnat 750 is powered by a Rotax 912 piston flat-four four-cycle engine with 64 kW (85 hp). The UAV can fly to an operational area from 2,000 kilometers (1,240 miles) away and loiter there for 12 hours before returning home.