German submarine U-3504
German submarine U-3504 was a Type XXI U-boat (one of the "Elektroboote") of Nazi Germany's Kriegsmarine, built for service in World War II. She was ordered on 6 November 1943, and was laid down on 30 June 1944 at F Schichau GmbH, Danzig, as yard number 1649. She was launched on 15 August 1944, and commissioned under the command of Kapitänleutnant Karl-Hartwig Siebold on 23 September 1944. Design Like all Type XXI U-boats, U-3504 had a displacement of when at the surface and while submerged. She had a total length of (o/a), a beam of , and a draught of . The submarine was powered by two MAN SE supercharged six-cylinder M6V40/46KBB diesel engines each providing , two Siemens-Schuckert GU365/30 double-acting electric motors each providing , and two Siemens-Schuckert silent running GV232/28 electric motors each providing . The submarine had a maximum surface speed of and a submerged speed of . When running on silent motors the boat could operate at a speed of . When submerged, the boat could operate at for ; when surfaced, she could travel at . U-3504 was fitted with six torpedo tubes in the bow and four C/30 anti-aircraft guns. She could carry twenty-three torpedoes or seventeen torpedoes and twelve mines. The complement was five officers and fifty-two men. Fate U-3504 was scuttled on 2 May 1945, at Wilhelmshaven, as part of Operation Regenbogen. The wreck was later raised and broken up. References Bibliography External links Type XXI submarines U-boats commissioned in 1944 U-boats sunk in 1945 World War II submarines of Germany 1944 ships Ships built in Danzig Operation Regenbogen (U-boat) Ships built by Schichau Maritime incidents in May 1945