German submarine U-1221
German submarine "U-1221" was a Type IXC/40 U-boat built for Nazi Germany's "Kriegsmarine" during World War II. Design. German Type IXC/40 submarines were slightly larger than the original Type IXCs. "U-1221" had a displacement of when at the surface and while submerged. The U-boat 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 MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of for use while surfaced, two Siemens-Schuckert 2  GU 345/34 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-1221" was fitted with six torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one SK C/32 naval gun, 180 rounds, and a SK C/30 as well as a C/30 anti-aircraft gun. The boat  had a complement of forty-eight. Service history. "U-1221" was ordered on 25 August 1941 from Deutsche Werft, AG in Hamburg under the yard number 384. Her keel was laid down on 28 October 1942 and the U-boat was launched the following year on 26 May 1943. She was commissioned into service under the command of "Oberleutnant zur See" Karl Kölzer (Crew 31) in the 4th U-boat Flotilla on 11 August 1943. On 20 January 1944, Kölzer handed over command to "Oberleutnant zur See" Paul Ackermann (Crew XII/39), who took her on her first - and only - patrol in  the West Atlantic from 20 August until 28 November 1944. During an air raid by Eighth Air Force on Kiel, "U-1221" was hit by two bombs in the fore-ship on 3 April 1945. The U-boat sank immediately, taking the skeleton crew of 18 with her. Seven of her crew perished, while the rest was rescued through the stern torpedo tubes the next day.