German submarine U-755
German submarine U-755
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German submarine U-755

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German submarine U-755

German submarine U-755 was a German Type VIIC submarine U-boat built for Nazi Germany's Kriegsmarine for service during World War II. Under the command of Kapitänleutnant Walter Göing. U-755 served with 9th U-boat Flotilla in the Atlantic, and later with 29th U-boat Flotilla operated in the Mediterranean Sea.

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-755 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), a beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.74 m (15 ft 7 in). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two Garbe, Lahmeyer & Co. RP 137/c double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two 1.23 m (4 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).

The submarine had a maximum surface speed of 17.7 knots (32.8 km/h; 20.4 mph) and a maximum submerged speed of 7.6 knots (14.1 km/h; 8.7 mph). When submerged, the boat could operate for 80 nautical miles (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,500 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph). U-755 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and a 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.

Work on U-755 began on 11 January 1940 at the Kriegsmarinewerft in Wilhelmshaven. She was commissioned on 3 November 1941, under the command of Kapitänleutnant Walter Göin and trained with 5th U-Boat Flotilla until 31 July 1942.

Serving with 9th U-boat Flotilla, she served in two patrols. On 9 September 1942 – thirty-four days into her first patrol- U-755 sank her first ship. At 15:16 on 9 September 1942, she fired a spread of three torpedoes at the USS Muskeget, two hits were reported. Of the 121 on board, all were killed. U-755 docked at Brest on 6 October, after sixty-four days at sea.

On 1 November, U-755 began travelling from Brest to La Spezia in Italy, after a further twenty-two days at sea.

On 1 December 1942, U-755 was transferred from 9th U-boat Flotilla, to 29th U-boat Flotilla. She began her twenty-five-day-long third voyage on 27 January 1943. She returned to La Spezia from Algeria on 20 February.

U-755 set out on her fourth patrol on 21 March 1943, where she was to head to Morocco, and then to Toulon, in Vichy France. At 02:07 on 26 March 1943, U-755 fired three torpedoes at a convoy north of Ceuta and confirmed a hit in the bow of FFL Sergent Gouarne (P-43), which broke in two and sank in approximately ninety seconds, killing five of its nineteen-man complement. The U-boat attacked the same convoy with another spread of three torpedoes at 04.13 hours and reported a hit after 12 minutes, but this was probably an end-of-run detonation.

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