German submarine U-3004 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 4 June 1944 at AG Weser, Bremen as yard number 1163. She was launched on 26 July 1944, and commissioned under the command of Kapitänleutnant Helmut Thurmann, on 30 August 1944.[3]