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HMS ''Vengeance'' is the fourth and final of the Royal Navy. ''Vengeance'' carries the Trident ballistic missile, the UK's nuclear deterrent. ''Vengeance'' was built at Barrow-in-Furness by Vickers Shipbuilding and Engineering Ltd (now BAE Systems Submarine Solutions), was launched in September 1998, and commissioned in November 1999. Before she was commissioned, the British Government stated that once the ''Vanguard'' submarines became fully operational, they would only carry 200 warheads. ''Vengeance'' carries the unopened "last instructions" (letters of last resort) of the current British Prime Minister that are to be used in the event of a national catastrophe or a nuclear strike.〔(''Cabinets and the Bomb'' by Peter Hennnessy, published for the British Academy by Oxford University Press reviewed on BBC Radio 4, Start the Week )〕 ==Operational history== On 31 March 2011, while on a training exercise ''Vengeance'' suffered a blockage in her propulsor causing a reduction in propulsion. The boat returned to Faslane naval base on the surface under her own power. According to the MOD the problems were not nuclear related.〔〔http://www.heraldscotland.com/news/home-news/trident-sub-crippled-in-accident-1.1094250〕 ''Vengeance'' is currently (as of 2012) undergoing a three-and-a-half year refit at HMNB Devonport near Plymouth while her sister ship Vigilant is taking her place.〔http://www.royalnavy.mod.uk/News-and-Events/Latest-News/2012/March/01/120301-Farewell-Vengeance〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「HMS Vengeance (S31)」の詳細全文を読む スポンサード リンク
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