The LTV A-7 Corsair II ended up being a light assault aircraft on the basis of the F-8 Crusader. The A-7 completed up being one of the main primary combat aircraft to feature a head-up display (HUD). doppler-bounded inertial navigation system, and a turbofan motor. It served using the united states Navy and the usa Air Force, and right after using the Air nationwide Guard. It had been furthermore exported to Southern Vietnam (through Vietnam War), Greece (A-7H), Portugal(A-7P), and Thailand (towards belated 1980s)