German submarine U-483

German submarine U-483 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

She carried out two patrols. She caused one warship to be declared a total loss.

She surrendered on 9 May 1945; she was sunk as part of Operation Deadlight on 16 December 1945.

Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-483 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 Siemens-Schuckert GU 343/38–8 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-483 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), one 3.7 cm Flak M42 and two twin 2 cm C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.

Service history
The submarine was laid down on 20 March 1943 at Deutsche Werke in Kiel as yard number 318, launched on 30 October and commissioned on 22 December under the command of Kapitänleutnant Hans-Joachim von Morstein.

She served with the 5th U-boat Flotilla from 22 December 1943 for training and the 3rd flotilla from 1 August 1944 for operations. She was reassigned to the 11th flotilla on 5 September.

First patrol
U-432's first patrol was preceded by short journeys from Kiel in Germany to Horten Naval Base (south of Oslo) and then Stavanger, both in Norway. The patrol itself began when the boat departed Stavanger on 3 October 1944. A Schnorchel [an underwater engine-functioning and breathing device], failure northwest of Scotland on the 12th resulted in the death of one man.

On 1 November 1944 she torpedoed the British frigate HMS Whitaker (K580) off Malin Head, Ireland. The bows were blown off the US-built ship. The commander, all the other officers and 84 ratings died, but the ship did not sink. The fires were put out and the flooding was stopped. She was eventually towed to Londonderry Port, then Belfast, but she was declared a total loss.

Second patrol
By now based at Bergen, the boat left there for her second foray on 7 February 1945. According to one source, she managed to enter the Irish Sea. She docked at Trondheim on 26 March.

Fate
U-483 surrendered in Trondheim on 9 May 1945. She was transferred to Scapa Flow then Loch Ryan in Scotland on 29 May for Operation Deadlight. She was sunk on 16 December by causes unknown.