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E 31

Built By: Alexander Stephens (Clyde)
Build Group: E3
Fate: Scrapped 6th September 1922.
E 31
E 31

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Commanders
1916: Lieutenant Commander   F E B Feilman

Events

 01-12-1914   Laid Down
 23-08-1915   Launched
 27-12-1915   Completed
E3 Specification
Length overall  181 ft
Beam  15 ft
Displacement   667 tons (surface)
  807 tons (submerged)
Diving Depth  200 ft
Speed  Surface 15.25 knots (design)
  Surface: 1500 miles on full power or 3000 miles at 10 knots (service)
  Submerged: 99 miles at 3 knots (design)
  Submerged: 10 miles at 9 knots or 65 miles at 5 knots (service)
No. of shafts  2
Propeller  3 blades, 5 ft 7 inch diameter
Armament  2 x 18 inch bow tubes
  2 x 18 inch beam tubes
  1 x 18 inch stern tube
  (10 torpedoes carried)
  1 x 2-pounder gun
Endurance  Surface: 3000 miles at 10 knots (design)
  Surface: 1500 miles on full power or 3000 miles at 10 knots (service)
  Submerged: 99 miles at 3 knots (design)
  Submerged: 10 miles at 9 knots or 65 miles at 5 knots (service)
Complement  3 Officers, 28 Ratings.
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Triton (N 15)

Class: 1935 - 1970: T Class
Built By: Vickers (Barrow)
Build Group: T 1
Fate:
On 28 November 1940, Triton left Malta for a patrol in the southern Adriatic Sea. On 6 December, the Italian merchant Olimpia was torpedoed by a British submarine in the area. Her distress message was picked up by the Royal Navy, which assumed that the attack had been carried out by Triton.

The submarine was never heard from again, and was declared lost with all hands on 18 December. Olimpia was successfully towed to port by Italian escort units.

The Italian Navy claimed that Triton was sunk by torpedo boats, probably Confienza, possibly by Clio, but the date cited was several days after contact was lost.

British sources claimed that Triton was sunk by naval mines in the Strait of Otranto
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