The LTV A-7 Corsair II was a light attack aircraft in line with the F-8 Crusader. The A-7 had been among 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 as well as the united states Air Force, and after with the Air nationwide Guard. It turned out additionally exported to Southern Vietnam (through the Vietnam War), Greece (A-7H), Portugal(A-7P), and Thailand (in belated 1980s)