The LTV A-7 Corsair II ended up being a light assault aircraft based on the F-8 Crusader. The A-7 ended up being one of the first combat aircraft to feature a head-up display (HUD). doppler-bounded inertial navigation system, and a turbofan motor. It served with both the usa Navy and also the United States Air Force, and later utilizing the Air National Guard. It had been also exported to South Vietnam (during the Vietnam War), Greece (A-7H), Portugal(A-7P), and Thailand (into the belated 1980s)