1951) No. 1903 Air Observation Post Flight RAF, No. 656 Squadron RAF (15 July 1948 – 17 August 1949) Royal Hong Kong Auxiliary Air Force (1 May 1949 – 1 April 1993) No. 28 Squadron RAF (11 May 1949 – 1 May 1950; 7 October 1950 – 28 March 1951; 15 August – 5 December 1955; 14 June 1957 – 2 January 1967; 1 March 1968 – 17 May 1978; 1 November 1996 – 4 June 1997) No. 80 Squadron RAF (20 August 1949 – 3 January 1950; 1 February – 7 March 1950; 28 April 1950 – 1 May 1955) Hong Kong Auxiliary Flight RAF (October 1949 – 1 October 1950) Hong Kong Auxiliary Squadron RAF (1 October 1950 – 24 November 1953) Hong Kong Auxiliary Air Force Wing RAF (24 November 1953 – xxx 1954) Hong Kong Fighter Squadron RAF (24 November 1953 – xxx 1954 RAF detachments No. 215 Squadron RAF (October 1945 – February 1946) No. 209 Squadron RAF April 1946 – January 1955) No. 81 Squadron RAF (October 1947 – April 1958) No. 205 Squadron RAF (September 1949 – March 1958) No. 88 Squadron RAF (June 1951 – October 1954) No. 60 Squadron RAF (July 1961 – May 1968) No. 103 Squadron RAF (August 1963 – March 1969) No. 110 Squadron RAF (January 1964 – March 1969) No. 45 Squadron RAF (June 1965 – February 1970) Kai Tak runway Kai Tak's first runway was a grass strip and the first tarmac, an east–west runway, was 457 metres long in 1939. A series of extensions were added over the years: 1940s - 1,371 metres runway added by the Japanese 1956 - 2,194 metres north–south runway added 1970 - 2,541 metres 1975 - 3,358 metres post 1975 - single asphalt runway 13/31 - 3,390 metres (or 11,122 feet) Facilities Hangar for aircraft at Choi Hung Road used to store Supermarine Spitfires. Historic buildings Several buildings of the former station remain. Three of them, built in 1934, are Grade I historic buildings: the Headquarters Building, the Officers Mess and an Annex Block. The former Headquarters Building is located at No. 50 Kwun Tong Road. It housed the Kai Tak Vietnamese Refugee Camp (啟德越南難民營) from 1979 to 1981, and was used for detaining Vietnamese refugees until 1997. It has been housing the Caritas Family Crisis Support Centre (明愛向晴軒) since 2002. The former Officers' Quarters Compound, which includes the RAF