aircraft to leave Aden, with one carrying the Union Jack back to HMS Eagle. 899 NAS was decommissioned on 23 January 1972. Training squadron Sea Harrier FRS1 (1980–1993) 899 NAS was recommissioned on 31 March 1980 with the British Aerospace Sea Harrier FRS.1, taking over from 700A Flight, the Sea Harrier Intensive Training Unit. It was the Sea Harrier Headquarters Squadron, converting pilots onto the Sea Harrier (they would first receive instruction on how to fly STOVL aircraft with the RAF's 233 Operational Conversion Unit where they would fly two seat Harrier T4 trainers), as well as carrying out continuing trials of the Sea Harrier. From August 1981, the squadron also received Hawker Hunter T.8M, fitted with the Sea Harrier's Ferranti Blue Fox radar. In April 1982, Argentina invaded the Falkland Islands, resulting in the Falklands War. While 899 Squadron did not take part directly in the war, most of its personnel and aircraft joined 800 NAS (HMS Hermes) and 801 NAS (HMS Invincible) for service in the South Atlantic. From May 1982, the squadron recommenced training activities, using Sea Harriers borrowed from the Aeroplane and Armament Experimental Establishment to train pilots for 809 Naval Air Squadron, specially formed for the Falklands War. In early July, the squadron received 8 RAF Harrier GR.3s on loan to help train the air wing for the new carrier , until the return of Hermes on 21 July provided sufficient Sea Harriers for the squadron to return to normal. In September 1983, it received its own two-seaters, three Harrier T4Ns, which were supplemented in 1987 by ex-RAF T4As, with the squadron taking full responsibility for the entire training task for Sea Harrier pilots in 1989. Sea Harrier FA2 (1993–2005) In June 1993 an Operational Evaluation Unit (OEU) for the British Aerospace Sea Harrier FA.2 was set up within the squadron, although the OEU operated out of Boscombe Down rather than Yeovilton, with the main squadron receiving FA.2s from September that year and beginning conversion training on the new mark in March 1994, continuing its role as the Harrier Operational Conversion Unit. In September 1994, four OEU Sea Harriers deployed aboard Invincible, as the carrier cruised in the Adriatic Sea as part of Operation Deny Flight, the NATO enforcement of a UN no-fly zone over Bosnia and Herzegovina during the Bosnian War. The OEU's four Sea Harriers operated with the six Sea Harrier FRS.1s of