German submarine U-1235

German submarine U-1235 was a Type IXC/40 U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 25 May 1943 at the Deutsche Werft yard at Hamburg, launched on 25 January 1944, and commissioned on 17 May 1944. She served with 31st U-boat Flotilla, a training unit, and with 33rd U-boat Flotilla from 1 December 1944 until 15 April 1945.

Design
German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-1235 had a displacement of 1144 t when at the surface and 1257 t 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 4400 PS for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1000 shp 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 m.

The submarine had a maximum surface speed of 18.3 kn and a maximum submerged speed of 7.3 kn. When submerged, the boat could operate for 63 nmi at 4 kn; when surfaced, she could travel 13850 nmi at 10 kn. U-1235 was fitted with six 53.3 cm torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one 10.5 cm SK C/32 naval gun, 180 rounds, and a 3.7 cm Flak M42 as well as two twin 2 cm C/30 anti-aircraft guns. The boat had a complement of forty-eight.

Service history
The U-boat completed two combat patrols in early 1945, but did not sink any ships.

Fate
U-1235 was sunk on 15 April 1945 in the North Atlantic by hedgehogs from the destroyer escorts USS Stanton (DE-247) and USS Frost (DE-144) during Operation Teardrop, at position 42.9°N, -30.41667°W.