The LTV A-7 Corsair II finished up being a light assault aircraft based on the F-8 Crusader. The A-7 completed up being one of the primary combat aircraft to feature a head-up display (HUD). doppler-bounded inertial navigation system, and a turbofan engine. It served utilizing the usa Navy even though the united states of america Air Force, and soon after utilising the Air nationwide Guard. It proved in addition exported to Southern Vietnam (through Vietnam War), Greece (A-7H), Portugal(A-7P), and Thailand (inside belated 1980s)