HMS Usurper

U-class submarine

Displacement: 540 long tons (549 t)
Length: 58.22 m (191 ft)
Beam: 4.9 m (16.1 ft)
Speed: 11.3 knots (20.8 km/h, 12.9 mph)
Complement: 27
Main gun: 76 mm (3 in)

Service

Royal Navy as HMS Usurper (P56)2 February 1943 — 3 October 1943243 days of the war

U-class submarine Particulars

Name: HMS Usurper
Builder: Vickers-Armstrongs, High Walker
Laid down: 18 September 1941
Launched: 24 September 1942
Commissioned: 2 February 1943
Fate: Sunk 3 October 1943 (1943)
Status: Wreck

Specifications

Displacement, surfaced: 540 long tons (549 t)
Displacement, submerged: 730 long tons (742 t)
Length: 58.22 m (191 ft)
Beam: 4.9 m (16.1 ft)
Draught: 4.62 m (15.2 ft)
Speed: 11.3 knots (20.8 km/h, 12.9 mph)
Complement: 27
Main gun: 76 mm (3 in)

HMS Usurper was a U-class submarine of the Royal Navy. Vickers-Armstrongs, High Walker laid her keel on 18 September 1941. She entered service on 2 February 1943, having been launched on 24 September 1942.

She was one of 53 ships of her class.

The boat displaced 540 long tons surfaced and 730 long tons submerged. She measured 58.2 m (191 ft) long with a beam of 4.9 m (16 ft). Her designed speed was 11.2 knots, and she carried a complement of 27. Her main battery was of 76 mm (3.0 in) calibre.

She was in commission for 243 days of the Second World War.

She was sunk on 3 October 1943. The wreck survives.

Written from the harvested record. Every figure above is sourced; the wording is this site's own.

Armament and machinery

Propulsion: 2 shaft diesel-electric
2 Paxman Ricardo diesel generators + electric motors
615 / 825 hp
Armament: 4 bow internal 21 inch (533 mm) torpedo tubes – 8–10 torpedoes
1 3 in gun

Sister ships

28 more in the class

Sources

Facts harvested from HMS Usurper on Wikipedia. Figures only — no wording is taken from it.