German submarine U-2355

German submarine U-2355 was a Type XXIII U-boat of Nazi Germany's Kriegsmarine during World War II. She was ordered on 20 September 1944, and was laid down on 18 October 1944 at Deutsche Werft AG, Hamburg, as yard number 509. She was launched on 13 December 1944 and commissioned under the command of Oberleutnant zur See Hans-Heino Franke on 12 January 1945.

Design

Like all Type XXIII U-boats, U-2355 had a displacement of when at the surface and while submerged. She had a total length of, a beam width of, and a draught depth of. The submarine was powered by one MWM six-cylinder RS134S diesel engine providing, one AEG GU4463-8 double-acting electric motor electric motor providing, and one BBC silent running CCR188 electric motor providing.
The submarine had a maximum surface speed of and a submerged speed of. When submerged, the boat could operate at for ; when surfaced, she could travel at. U-2355 was fitted with two torpedo tubes in the bow. She could carry two preloaded torpedoes. The complement was 14 – 18 men. This class of U-boat did not carry a deck gun.

On 3 May 1945, U-2355 was scuttled northwest of Laboe as part of Operation Regenbogen.
The wreck now lies at.