German submarine U-632 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 4 September 1941 at the Blohm & Voss yard at Hamburg, launched on 27 May 1942, and commissioned on 23 July 1942 under the command of Oberleutnant zur See Hans Karpf.
Attached to 5th U-boat Flotilla based at Kiel, U-632 completed her training period on 31 December 1942 and was assigned to front-line service.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-632 had a displacement of 769t when at the surface and 871t while submerged. She had a total length of 67.1m (220.1feet), a pressure hull length of 50.5m (165.7feet), a beam of 6.2m (20.3feet), a height of 9.6m (31.5feet), and a draught of 4.74m (15.55feet). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of NaNPS for use while surfaced, two BBC GG UB 720/8 double-acting electric motors producing a total of 750PS for use while submerged. She had two shafts and two 1.23abbr=onNaNabbr=on 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-632 was fitted with five 53.30NaN0 torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.82NaN2 SK C/35 naval gun, 220 rounds, and one twin 2sp=usNaNsp=us C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.
Operating from Brest, France, U-632 went on two war patrols. On the second patrol, while operating against Convoy HX 231, U-632 sank the Dutch cargo ship after chasing her for more than nine hours and having twice missed her target. Later that day Liberator of No. 86 Squadron RAF detected U-632 and sank her with five depth charges southwest of Iceland in position 58.0333°N -70°W on 6 April 1943. All 48 crew members were killed in the attack.
| Date | Ship Name | Nationality | Tonnage (GRT) | Fate[1] | |
|---|---|---|---|---|---|
| 3 February 1943 | Cordelia |  United Kingdom | 8,190 | Sunk | |
| 6 April 1943 |  Netherlands | 7,065 | Sunk |