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German Type II submarines were based on the Finnish submarine Vesikko. U-3 had a displacement of 254 tonnes (250 long tons) when at the surface and 303 tonnes (298 long tons) while submerged. Officially, the standard tonnage was 250 long tons (250 t), however. [ 4 ]
U-4 was the longest-serving Austro-Hungarian submarine and sank 14,928 gross register tons (GRT) and 7,345 tons of ships, including the Italian armored cruiser Giuseppe Garibaldi in July 1915. U-4 was handed over to France as a war reparation in 1920 and scrapped.
The double-hulled submarine was just under 139 feet (42 m) long and displaced between 240 and 300 tonnes (260 and 330 short tons), depending on whether surfaced or submerged. The design of the submarine had poor diving qualities and several modifications to U-3 ' s diving planes and fins occurred in her first years in the Austro-Hungarian Navy.
SM U-3 was the third German U-boat created by the German Empire in their history, and the first of two submarines in its class. The boat was built by Kaiserliche Werft Danzig and was launched on 27 March 1909.
SM UC-3, a Type UC I submarine launched in 1915 and sunk on 27 May 1916; German submarine U-3 (1935), a Type IIA submarine that served in the Second World War and was scrapped in 1945; German submarine U-3 (S182), a Type 201 submarine of the Bundesmarine that was launched in 1964; loaned out to Royal Norwegian Navy from 1964 to 1966; later ...
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.
U-995, a typical VIIC/41 U-boat on display at the Laboe Naval Memorial. U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars.The term is an anglicized version of the German word U-Boot ⓘ, a shortening of Unterseeboot (under-sea boat), though the German term refers to any submarine.
Submarines of World War II represented a wide range of capabilities with many types of varying specifications produced by dozens of countries. The principle countries engaged in submarine warfare during the war were Germany, Italy, Japan, the United States, United Kingdom and the Soviet Union. The Italian and Soviet fleets were the largest.