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Trenchant (S91)

Built By: Vickers (Barrow)
Build Group: SSN Group 4b

Launched by Lady Meriel Hunt, wife of Admiral Sir Nicholas Hunt, Commander in Chief Fleet

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Events

22-03-1983 : Ordered from Vickers, Barrow
12-07-1984 : Laid Down
03-11-1986 : Launched
14-01-1989 : Completed
07-02-1989 : Left Barrow
12-05-2013 : HMS Trenchant returned home to Devonport 11 months to the day she sailed on what became the longest patrol ever completed by one of the Royal Navy’s hunter-killer boats – beating the old record by HMS Tireless by 12 days.

At continued high readiness as the United Kingdoms front-line strike asset, the submarine spent 267 days east of Suez, continuing the nuclear-powered submarine presence that has been established there since 2001.

Operating under joint command, the submarine has completed several periods of national tasking and contributed to NATO operations against terrorism and counter narcotics.

During this time the vessel has visited six different ports: Fujairah, UAE; the British Indian Ocean Territory – Diego Garcia; the Kingdom of Bahrain; Aqaba, Jordan; Souda Bay, Crete; and Gibraltar.

HMS Trenchant conducted training and multi-national exercises with seven UK warships, a French submarine, multiple US warships and auxiliaries, a US submarine and a range of multinational aircraft - to develop the ability to conduct joint operations.

The deployment covered 38,800nm (the equivalent of 1¾ times around the world) and the submarine has spent over 4,700 hours underwater – the equivalent of 6½ months.

The submarine would now undergo a two-year maintenance period readying the boat for renewed operations.


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