The LTV A-7 Corsair II ended up being a light attack aircraft based on the F-8 Crusader. The A-7 was one of the primary combat aircraft to feature a head-up display (HUD). doppler-bounded inertial navigation system, and a turbofan motor. It served with both the united states of america Navy as well as the united states of america Air Force, and soon after using the Air National Guard. It absolutely was additionally exported to Southern Vietnam (through the Vietnam War), Greece (A-7H), Portugal(A-7P), and Thailand (in the belated 1980s)