Valiant in Florida in 1994
|Ordered:||31 August 1960|
|Laid down:||22 January 1962|
|Launched:||3 December 1963|
|Commissioned:||18 July 1966|
|Decommissioned:||12 August 1994|
|Class and type:||Valiant-class submarine|
|Length:||285 ft (87 m)|
|Beam:||33 ft 3 in (10.13 m)|
|Draught:||27 ft (8.2 m)|
|Range:||Unlimited, except by food supplies|
|Armament:||6 × 21 inch (533 mm) bow torpedo tubes|
The sixth and most recent HMS Valiant was the second of Britain's nuclear-powered submarines, and the first of the two-unit Valiant class. She was ordered on 31 August 1960, laid down 22 January 1962, launched on 3 December 1963 by Lady Thorneycroft, and finally entered service 18 July 1966.
She was refitted in 1970, 1977 and 1989.
In 1977 Valiant was trailing a Soviet submarine in the eastern Mediterranean when she suffered a salt water pipe leak, which flooded the reactor compartment with sea water. The reactor was shut down and the compartment pumped dry and after a clean-up of the compartment, the reactor was taken under power again. Valiant took part in the Falklands War in 1982, arriving in the war zone on 17 May. She transmitted more than 300 early air-warning alerts and spent 101 days on patrol off Argentina's Patagonian coast. Valiant suffered minor damage while submerged when an Argentine aircraft coming back from a mission jettisoned its bombs near the submarine.
Following the development of engine trouble in June 1994, she was paid off on 12 August 1994.
- Ballantyne, Iain (2014). Hunter Killers: The Dramatic Untold Story of the Royal Navy's Most Secret Service. London: Orion. ISBN 978-1-4091-3901-0.
- Hennesey, Peter; Jinks, James (2016). The Silent Deep: The Royal Navy Submarine Service since 1945. Penguin. ISBN 978-0-241-95948-0.
- Middlebrook, Martin (2012). The Falklands War. Barnsley, UK: Pen & Sword Military. ISBN 978-1-84884-636-4.|
- Moore, John, ed. (1982). Janes Fighting Ships 1982–83. Jane's Publishing. p. 547. ISBN 0-7106-0742-3.