HMS TRENCHANT (S91)
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.
Following the Integrated Review of 2020, TRENCHANT is now scheduled to decommission by the end of 2021.
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,
2021 Fate: in active service.
Class and type: Trafalgar-class submarine, Displacement: Surfaced: 4,500 to 4,800 t (4,700 long tons; 5,300 short tons), Submerged: 5,200 to 5,300 t (5,200 long tons; 5,800 short tons). Length: 85.4 m (280 ft), Beam: 9.8 m (32 ft), Draught: 9.5 m (31 ft).
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
Speed: Over 30 knots (56 km/h), submerged, Range: Unlimited.
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
5 × 21-inch (533 mm) torpedo tubes with stowage for up to 30 weapons:
Tomahawk Block IV cruise missiles.
Niger 2021 3300F sgMS?, Scott? (Trenchant in border) Although this edition was authorized by the Niger postal administration, it was not sold in Niger, but only distributed to the novelty trade by the Nigerian philatelic agency.
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