German submarine U-237

German submarine U-237 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

The submarine was laid down on 23 April 1942 at the Friedrich Krupp Germaniawerft yard at Kiel as yard number 667, launched on 17 December and commissioned on 30 January 1943 under the command of Oberleutnant zur See Hubert Nordheimer. After training with the 5th U-boat Flotilla at Kiel, she went to the 23rd flotilla as a trials boat and then to the 31st flotilla. She was sunk by American bombs at the Germaniawerft in Kiel during a raid on 14 May 1943, but was raised, repaired and returned to service. She was sunk a second time by British bombs at the Deutsche Werke in Kiel on 4 April 1945.

Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-237 had a displacement of 769 t when at the surface and 871 t while submerged. She had a total length of 67.10 m, a pressure hull length of 50.50 m, a beam of 6.20 m, a height of 9.60 m, and a draught of 4.74 m. The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2800 to 3200 PS for use while surfaced, two AEG GU 460/8-276 double-acting electric motors producing a total of 750 PS for use while submerged. She had two shafts and two 1.23 m propellers. The boat was capable of operating at depths of up to 230 m.

The submarine had a maximum surface speed of 17.7 kn and a maximum submerged speed of 7.6 kn. When submerged, the boat could operate for 80 nmi at 4 kn; when surfaced, she could travel 8500 nmi at 10 kn. U-237 was fitted with five 53.3 cm torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm SK C/35 naval gun, 220 rounds, and a 2 cm C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.