HMS Spartan was a nuclear-powered fleet submarine of the Royal Navy's Swiftsure class. Spartan was launched on 7 April 1978 by Lady Lygo, wife of Admiral Sir Raymond Lygo. The boat was built by Vickers Limited Shipbuilding Group (now a division of BAE Systems) at Barrow-in-Furness in Cumbria, England. She was decommissioned in January 2006.

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HMS Spartan in 1993
History
United Kingdom
Name	HMS Spartan
Ordered	7 February 1976
Builder	Vickers
Laid down	26 April 1976
Launched	7 May 1978
Commissioned	22 September 1979
Decommissioned	January 2006
Identification	Pennant number: S105
Motto	Courage With Great Endurance
Fate	Paid off
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General characteristics
Class and type	Swiftsure-class submarine
Displacement	4,900 tonnes (dived)
Length	82.9 m (272 ft 0 in)
Beam	9.8 m (32 ft 2 in)
Draught	8.5 m (27 ft 11 in)
Propulsion	Rolls-Royce pressurised water nuclear reactor (PWR1)
Speed	In excess of 20 knots (37 km/h), dived
Complement	116 officers and ratings
Armament	5 × 21 in (533 mm) torpedo tubes Spearfish torpedoes RN Sub Harpoon missiles Tomahawk cruise missiles

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Spartan was ordered to sail south for the Falkland Islands two days before the Argentine invasion of the islands on 30 March 1982. Spartan was the first vessel to arrive in the islands and began to enforce a 200-mile (320 km) maritime exclusion zone imposed by the British. Shortly after, Spartan sighted Argentine merchant shipping mining the harbour at Stanley, but was not ordered to attack. This was partly due to British concerns about escalating the war too early, but also to avoid scaring off more lucrative targets such as the Argentine aircraft carrier Veinticinco de Mayo. On 1 May, Spartan was marking Veinticinco de Mayo, from just outside the Argentinian 12-mile (19 km) limit, when the submarine was ordered away by the Northwood fleet command in England,^[1] rejecting the strong view of the task force commander, Admiral Woodward. He considered, as the highest ranking naval officer in the area, he should control the RN submarines in the area and potentially faced losing the war by the lack of local control in the battle zone ^[2] In the following days Veinticinco de Mayo was therefore able to move, unchecked by the British nuclear submarines, and potentially launch an A-4Q Skyhawk attack from much closer range than possible from Argentinian airfields. Unlike HMS Conqueror, Spartan did not fire in anger during the Falklands War, though she did provide valuable reconnaissance to the British Task Force on Argentine aircraft movements.

In November 2010, it was reported in Hansard that Spartan had run aground off the west coast of Scotland in October 1989.^[3]

In 1999, Spartan was fitted with Tomahawk cruise missiles.