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Sea Dagger: midget submarine developed by Kockums: a midget submarine of modular design with length of 16 – 20 m depending on various configurations totaling 4, including training, reconnaissance, diver delivery and small attack versions. All versions are consisted of 3 modules, two of which are identical for all versions, the bow and stern ...
Biber (German for "beaver") was a German midget submarine of the Second World War. Armed with two externally mounted 53-centimetre (21 in) torpedoes or mines, they were intended to attack coastal shipping. They were among the smallest submarines in the Kriegsmarine. The Biber was hastily developed to help meet the threat of an Allied invasion ...
NR-1 was launched on 25 January 1969, completed initial sea trials 19 August 1969, and was home-ported at Naval Submarine Base New London. NR-1 was the smallest nuclear submarine ever put into operation. The vessel was casually known as "Nerwin" and was never officially named or commissioned.
Prototype "fleet submarines"—submarines fast enough (21 knots (11 m/s)) to travel with battleships. Twice the size of any concurrent or past U.S. submarine. A poor tandem engine design caused the boats to be decommissioned by 1923 and scrapped in 1930.
Type 212 submarine. Builders: Germany / Italy; Displacement: 1,830/2,500 tons ("A" or "CD" variant) Operators: German Navy: 6 in service (A), 2 more ordered (CD) Marina Militare: 4 in service (A), 3 more ordered with option for a fourth (A) – known as the Todaro-class Royal Norwegian Navy: 4 ordered (CD) Type 214 submarine. Builder: Germany
X-1 (or SS X-1) [1] was a United States Navy Midget Submarine designed under project SCB 65.Laid down on 8 June 1954, at Deer Park, Long Island, New York, by the Engine Division of Fairchild Engine and Airplane Corporation.
Although among the smallest nuclear-powered attack submarines ever built, the Skate class served for many years, with the last being decommissioned in 1989. USS Skate was the first submarine to surface at the North Pole, on 17 March 1959.
Size comparison of common World War II submarines with the Typhoon class Soviet Typhoon-class ballistic missile submarine, with inset of an American football field graphic to convey a sense of the enormous size of the vessel. The Typhoon class was developed under Project 941 as the Soviet Akula class (Акула), meaning shark.