German submarine U-903 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. She was ordered on 16 July 1942, and was laid down on 25 August 1942 at Flender Werke AG, Lübeck, as yard number 329. She was launched on 17 July 1943 and commissioned under the command of Leutnant zur See Hans Hellmann on 4 September 1943. Design German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-903 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 SSW 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-903 was fitted with five torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes or 26 TMA mines, one SK C/35 naval gun, (220 rounds), one Flak M42 and two twin C/30 anti-aircraft guns. The boat had a complement of between 44 — 52 men. Service history On 5 May 1945, U-903 was scuttled in the Gelting Bay near Gelting. She was later raised and broken up in 1947. References Bibliography External links German Type VIIC submarines U-boats commissioned in 1943 World War II submarines of Germany Ships built in Lübeck 1943 ships Operation Regenbogen (U-boat) Maritime incidents in May 1945