Hart Dyke was conscripted for National Service in 1959, and served as a midshipman in the Royal Naval Volunteer Reserve on Battleaxe.[2] He then joined the Royal Navy and was trained at the Britannia Royal Naval College at Dartmouth,[3] and served aboard the frigate Eastbourne, based in the Far East and Persian Gulf.[2] He was commissioned as a sub-lieutenant on 1 September 1961, and was promoted to lieutenant on 1 January 1962,[4] to command a Gay-class fast patrol boat based at Plymouth. He served aboard the Ton-class minesweeper Lanton during the Indonesian Confrontation in 1963, then as navigating officer aboard the frigates Palliser on fishery protection duties in 1963–1965, Gurkha in the Persian Gulf, 1965–1966, and Tenby in the Dartmouth Training Squadron, 1966–1968, before being appointed an instructor at the Royal Naval College, Dartmouth,[2] where he was promoted to lieutenant commander on 1 January 1970.[5] He attended a year-long staff course[2] before being promoted to commander on 30 June 1974[6] and appointed first lieutenant and executive officer of the guided missile destroyer Hampshire.[7] From 1976 he served on the staff of the Royal Naval Staff College, then from 1978 as the commander of the Royal Yacht Britannia.[7][8] He was made a Member of the Royal Victorian Order (4th class) (MVO) on 1 January 1980.[9]
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On 31 December 1980 Hart Dyke was promoted to captain,[10] and appointed to command of the Type 42 destroyer Coventry, seeing active service during the Falklands War.[11] On 25 May 1982 Coventry was stationed north-west of Falkland Sound with Broadsword, providing radar cover for the ground troops in San Carlos Water, when she was attacked by four Argentine A-4 Skyhawks. Hit by two 1,000 lb (450 kg) bombs, she capsized within 20 minutes, with the loss of 19 men.[12]
He subsequently served as Assistant Chief of Staff to the Commander of the British Naval Staff in Washington, D.C., from 1982 to 1984, and as Assistant Naval Attaché in Washington from 1985 to 1987.[7] From 1987 until 1989 he was Director of Naval Recruiting,[7] and 7 July 1988 was also appointed a naval aide-de-camp to the Queen.[13] On 1 January 1990 Hart Dyke was made a Commander of the Order of the British Empire (CBE),[14] and retired from the Royal Navy a week later on the 7th.[15]
After leaving the Navy, Hart Dyke was appointed Clerk and Chief Executive of the Worshipful Company of Skinners, a livery company of the City of London. He retired in 2003, and in 2007 published Four Weeks in May, his account of the loss of Coventry during the Falklands War.[16]
