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German submarine U-480
''U-480'' was an experimental ''Kriegsmarine'' Type VIIC U-boat of World War II. Considered by many to be the first stealth submarine, it was equipped with a special rubber coating (codenamed "Alberich", probably after the German mythological character who had the ability to become invisible), that made it difficult to detect with British ASDIC (sonar).
The U-boat was laid down in the Deutsche Werke in Kiel as yard number 311 on 8 August 1942, launched on 14 August 1943 and commissioned on 6 October 1943 under ''Oberleutnant zur See'' Hans-Joachim Förster. ''U-480'' carried out three war patrols, all under Förster's command. Because of its coating, the boat was sent to the heavily defended English Channel. The ''Alberich'' worked; ''U-480'' was never detected by sonar.
==Design==
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. ''U-480'' had a displacement of when at the surface and while submerged. She had a total length of , a pressure hull length of , a beam of , a height of , and a draught of . The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of for use while surfaced, two Siemens-Schuckert GU 343/38–8 double-acting electric motors producing a total of for use while submerged. She had two shafts and two propellers. The boat was capable of operating at depths of up to .
The submarine had a maximum surface speed of and a maximum submerged speed of . When submerged, the boat could operate for at ; when surfaced, she could travel at . ''U-480'' was fitted with five torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one , 220 rounds, and an anti-aircraft gun. The boat had a complement of between forty-four and sixty.
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