German submarine U-1234 was a Type IXC/40 U-boat of Nazi Germany's Kriegsmarine built during World War II for service in the Battle of the Atlantic. U-1234 was unusual for having sunk twice, once by accident and once as part of the great destruction of the remaining Kriegsmarine in the days before the surrender.
German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-1234 had a displacement of 1,144 tonnes when at the surface and 1,257 tonnes while submerged. The U-boat had a total length of 76.76 m , a pressure hull length of 58.75 m , a beam of 6.86 m , a height of 9.60 m , and a draught of 4.67 m . The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of 4,400 metric horsepower for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1,000 shaft horsepower for use while submerged. She had two shafts and two 1.92 m propellers. The boat was capable of operating at depths of up to 230 metres .
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