HMS Trenchant (S91)
|Ordered:||22 March 1983|
|Builder:||Vickers Shipbuilding, Barrow-in-Furness|
|Laid down:||28 October 1985|
|Launched:||3 November 1986|
|Commissioned:||14 January 1989|
|Homeport:||HMNB Devonport, Plymouth|
|Fate:||in active service|
|Class and type:||Trafalgar-class submarine|
|Length:||85.4 m (280 ft)|
|Beam:||9.8 m (32 ft)|
|Draught:||9.5 m (31 ft)|
|Speed:||Over 30 knots (56 km/h), submerged|
HMS Trenchant is a Trafalgar-class nuclear-powered fleet submarine of the Royal Navy built by Vickers Shipbuilding, Barrow-in-Furness. Trenchant is in service and is based at HMNB Devonport. She is the third vessel and the second submarine of the Royal Navy to be named for the characteristic of vigour and incisiveness.
The submarine was ordered on 22 March 1983. She was laid down by Vickers Shipbuilding on 28 October 1985, and was launched on 3 November 1986 in the presence of Vice Admiral Sir Arthur Hezlet, who had commanded the World War II T-class submarine Trenchant. She was commissioned into the Royal Navy on 14 January 1989.
Trenchant is scheduled to be decommissioned in 2019.
On 22 November 1990, the nets of the fishing vessel Antares were snagged by Trenchant in the Bute Sound in Scotland. At the time the submarine was conducting a 'Perisher' Submarine Command Course exercise in company with the frigate HMS Charybdis. Antares was pulled under with the loss of all four members of the crew.
In July 1997, the submarine ran aground off the western coast of Australia. While approaching Fremantle, Western Australia, the submarine remained at a depth of 200 metres (660 ft) and grounded when she made contact with the continental shelf, coming to rest on a sloping patch of seafloor. Trenchant was able to free herself, and an inspection by divers reported no significant damage.
In late 2009, Trenchant entered the Devonport submarine refit complex to undertake a 2-year refit and upgrade programme. Upon completion of the programme, the submarine underwent a rededication service on 6 June 2011 to welcome the boat back to active service.
On 22 May 2013, Trenchant completed the longest patrol ever carried out by a Royal Navy SSN. The patrol lasted 335 days (11 months) during which the submarine sailed 38,800nm. 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.
Following a maintenance period involving a weapon and sensors upgrade, Trenchant returned to service in August 2016.
Trenchant is affiliated with the following military and civilian organisations, bodies & individuals:
- Sea Cadet unit TS St David’s
- Sea Cadet unit TS Echo (Llanelli)
- Town of Llanelli
- Lady Meriel Hunt (sponsor)
- Bush, Steve (2014). British Warships and Auxiliaries. Maritime Books. p. 12. ISBN 1904459552.
- "HMS Trenchant (S91) - Royal Navy". mod.uk. Retrieved 7 August 2016.
- Jane's Fighting Ships, 2004-2005. Jane's Information Group Limited. p. 796. ISBN 0-7106-2623-1.
- Hansard HL Deb 14 March 2005 vol 670 c116WA quoted in House of Commons Defence Committee - Fourth Report, 12 Dec 2006
- "Collision between pelagic trawler Antares and trafalgar-class submarine HMS Trenchant with loss of 4 lives Marine Accident Investigation Branch report - GOV.UK". maib.gov.uk. Retrieved 7 August 2016.
- Cusick, James (10 July 1992). "Submarine crew blamed for sinking of Antares". The Independent. London.
- Stewart, Cameron (8 April 2009). "Brits' nuclear sub accident surfaces". The Australian. p. 6. Retrieved 10 April 2009.
- "Navy News - Reporting from the Fleet". navynews.co.uk. Retrieved 7 August 2016.
- "UK: HMS Trenchant Comes Home from the Longest Patrol Ever". navaltoday.com. Retrieved 7 August 2016.
- "Trenchant completes record-breaking mission- Royal Navy". mod.uk. Retrieved 7 August 2016.
- George Allison (22 August 2016). "Nuclear submarine HMS Trenchant rejoins the fleet". UK Defence Journal. Retrieved 16 February 2017.
- Submarines, War Beneath The Waves, From 1776 To The Present Day, by Robert Hutchinson
- Royal Navy HMS Trenchant (royalnavy.mod.uk)