The Supermarine Attacker was a British single-seat naval jet fighter built by Supermarine for the Royal Navy's Fleet Air Arm (FAA). It was the FAA's first jet fighter. The first production Attacker F.1 flew on 5 May 1950 and operational service began in August 1951 with No 800 Squadron FAA. Subsequent versions were the FB.1 fighter-bomber with provision for underwing ordnance and the FB.2 which differed mainly in its Nene Mk.102 engine. The Attacker served with only two FAA front line squadrons and had been relegated to Volunteer Reserve units by 1954 and retired two years later. Between 1952 and 1953, 36 Attackers were sold to the Pakistani Air Force (PAF). The aircraft was replaced in the PAF in the 1960s.