HMS Trenchant (S91)

For other ships with the same name, see HMS Trenchant.

HMS Trenchant in 2017
History
United Kingdom
NameHMS Trenchant
Ordered22 March 1983
BuilderVickers Shipbuilding, Barrow-in-Furness
Laid down28 October 1985
Launched3 November 1986
Commissioned14 January 1989
Decommissioned20 May 2022
HomeportHMNB Devonport, Plymouth
FateDecommissioned
Badge
General characteristics
Class and typeTrafalgar-class submarine
Displacement
  • Surfaced: 4,500 to 4,800 t (4,700 long tons; 5,300 short tons)[1]
  • Submerged: 5,200 to 5,300 t (5,200 long tons; 5,800 short tons)[1]
Length85.4 m (280 ft)[1]
Beam9.8 m (32 ft)[1]
Draught9.5 m (31 ft)[1]
Propulsion
  • 1 × Rolls-Royce PWR1 nuclear reactor
  • 2 × GEC steam turbines
  • 2 × WH Allen turbo generators; 3.2 MW
  • 2 × Paxman diesel alternators 2,800 shp (2.1 MW)
  • 1 × pump jet propulsor
  • 1 × motor for emergency drive
  • 1 × auxiliary retractable prop
SpeedOver 30 knots (56 km/h; 35 mph), submerged[1]
RangeUnlimited[1]
Complement130[1]
Electronic warfare
& decoys
  • 2 × SSE Mk8 launchers for Type 2066 and Type 2071 torpedo decoys
  • RESM Racal UAP passive intercept
  • CESM Outfit CXA
  • SAWCS decoys carried from 2002
Armament
  • 5 × 21-inch (533 mm) torpedo tubes with stowage for up to 30 weapons:

HMS Trenchant was a Trafalgar-class nuclear-powered fleet submarine of the Royal Navy built by Vickers Shipbuilding, Barrow-in-Furness. Trenchant was based at HMNB Devonport. She was 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.[2] She was commissioned into the Royal Navy on 14 January 1989.[3]

Following the Integrated Review of 2020, Trenchant left active service in 2021 and formally decommissioned in May 2022.

  1. ^ a b c d e f g h Bush, Steve (2014). British Warships and Auxiliaries. Maritime Books. p. 12. ISBN 978-1904459552.
  2. ^ "HMS Trenchant (S91) - Royal Navy". mod.uk. Retrieved 7 August 2016.
  3. ^ Jane's Fighting Ships, 2004–2005. Jane's Information Group Limited. p. 796. ISBN 0-7106-2623-1.