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German submarine U-674 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 7 April 1942 at the Howaldtswerke yard at Hamburg, launched on 8 May 1943, and commissioned on 15 June 1943 under the command of Oberleutnant zur See Harald Muhs.
| History | |
|---|---|
 Nazi Germany | |
| Name | U-674 |
| Ordered | 20 January 1941 |
| Builder | Howaldtswerke, Hamburg |
| Yard number | 823 |
| Laid down | 7 April 1942 |
| Launched | 8 May 1943 |
| Commissioned | 15 June 1943 |
| Fate | Sunk by British aircraft north of Tromsø on 2 May 1944 |
| General characteristics | |
| Class and type | Type VIIC submarine |
| Displacement | |
| Length |
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| Beam |
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| Height | 9.60 m (31 ft 6 in) |
| Draught | 4.74 m (15 ft 7 in) |
| Installed power |
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| Propulsion |
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| Speed |
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| Range |
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| Test depth |
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| Complement | 4 officers, 40–56 enlisted |
| Armament |
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| Service record | |
| Part of: |
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| Identification codes: | M 52 506 |
| Commanders: |
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| Operations: |
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| Victories: | None |
Attached to 5th U-boat Flotilla based at Kiel, U-674 completed her training period on 31 January 1944 and was assigned to front-line service.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-674 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.[1] 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 Siemens-Schuckert GU 343/38–8 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).[1]
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).[1] 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-674 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 two twin 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.[1]
While operating against convoy RA 59, U-674 was detected by Swordfish B of 842 Naval Air Squadron embarked on HMS Fencer, an escort carrier, north of Tromsø on 2 May 1944. The aircraft attacked, destroying the U-boat. All 49 crew members perished in the attack.[2] [3]
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