Recognition Guide Warships of the Second World War
Royal Navy — Submarine

HMS P311

HMS P311
Ministry of Information official photographer — http://media.iwm.org.uk/iwm/mediaLib//31/media-31786/large.jpg This photograph TR 526 comes from the collections of the Imperial War Museums — Public domain — Wikimedia Commons Plate On Board the Submarine Depot Ship HMS Forth, Holy Loch, Scotland, 1942 The depot ship HMS FORTH transferring a practice torpedo to the submarine P311. HMS SIBYL (P217) is seen alongside and another submarine is seen in the background.

Service

  1. Royal Navy as HMS P3117 August 1942 — 31 December 1942143 days of the war
HMS P311 Particulars
Name
HMS P311
Builder
Vickers-Armstrongs, Barrow
Ordered
11 June 1931
Laid down
25 April 1941
Launched
5 March 1942
Commissioned
7 August 1942
Fate
Missing after 31 December 1942 (1942)
Status
Unknown

Specifications

Displacement, surfaced
1,290 long tons (1,311 t)
Displacement, submerged
1,560 long tons (1,585 t)
Length
84.12 m (276 ft)
Beam
7.62 m (25 ft)
Draught
3.66 m (12 ft)
Speed
15.5 knots (28.7 km/h, 17.8 mph)
Range
4,500 nmi (8,334 km)
Complement
61
Main gun
102 mm (4 in)

HMS P311 was a submarine built for the Royal Navy. Her keel was laid at Vickers-Armstrongs, Barrow on 25 April 1941. Launched on 5 March 1942, she entered service on 7 August 1942.

The boat displaced 1,290 long tons surfaced and 1,560 long tons submerged. She measured 84.1 m (276 ft) long with a beam of 7.6 m (25 ft). Her designed speed was 15.5 knots, and she carried a complement of 61. Her main battery was of 102 mm (4.0 in) calibre.

She was in commission for 143 days of the Second World War.

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

Armament and machinery

Armament and machinery
Propulsion
  • Two shafts
  • Twin diesel engines 2,500 hp (1.86 MW) each
  • Twin electric motors 1,450 hp (1.08 MW) each
Armament
  • 6 internal forward-facing 21 in torpedo tubes
  • 2 external forward-facing torpedo tubes
  • 2 external amidships rear-facing torpedo tubes
  • 1 external rear-facing torpedo tubes
  • 6 reload torpedoes
  • 1 x 4 inch deck gun

Sources

  • Facts harvested from HMS P311 on Wikipedia. Figures only — no wording is taken from it.
  • Photograph: Ministry of Information official photographer — http://media.iwm.org.uk/iwm/mediaLib//31/media-31786/large.jpg This photograph TR 526 comes from the collections of the Imperial War Museums — Public domain — Wikimedia Commons