HMS B11

Survived

Type	Submarine
War	First World War
Main guns	2 × 18 in (450 mm) bow torpedo tubes

Old submarine. Dived under five rows of mines into the Dardanelles in December 1914 and sank Mesudiye; her captain, Norman Holbrook, won the Victoria Cross.

Caption:"The B-11 is 135 feet long, 313 tons displacement and carries 15 men submerged. This is the first conspicuous feat accomplished by a British submarine since the war began." Photo: Evening public ledger., Public domain · Wikimedia Commons

Armament and specifications

Armament

2 × 18 in (450 mm) bow torpedo tubes

Builder	Vickers
Launched	21 February 1906
Displacement	287 long tons (292 t) surfaced 316 long tons (321 t) submerged
Length	142 ft 3 in (43.4 m)
Speed	12 knots (22 km/h; 14 mph) (surfaced) 6.5 knots (12.0 km/h; 7.5 mph) (submerged)
Complement	2 officers and 13 ratings

As built, from the ship's Wikipedia article. Figures there may cover later refits too.

Career

Launched

21 February 1906

Sinking of Mesudiye

Survived

13 December 1914

Lt Norman Holbrook, VC

Fate

Survived

Sold for scrap, 1919