German submarine U-757

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History
Nazi Germany
Name: U-757
Ordered: 9 October 1939[1]
Builder: Kriegsmarinewerft Wilhelmshaven
Yard number: 140
Laid down: 18 May 1940[1]
Launched: 14 December 1941[1]
Commissioned: 28 February 1942[1]
Status: Destroyed 8 January 1944[1]
General characteristics
Class and type: Type VIIC submarine
Displacement:
  • 769 tonnes (757 long tons) surfaced
  • 871 t (857 long tons) submerged
Length:
Beam:
  • 6.20 m (20 ft 4 in) o/a
  • 4.70 m (15 ft 5 in) pressure hull
Height: 9.60 m (31 ft 6 in)
Draught: 4.74 m (15 ft 7 in)
Installed power:
  • 2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels)
  • 750 PS (550 kW; 740 shp) (electric)
Propulsion:
Speed:
  • 17.7 knots (32.8 km/h; 20.4 mph) surfaced
  • 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range:
  • 8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced
  • 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:
  • 230 m (750 ft)
  • Crush depth: 250–295 m (820–968 ft)
Complement: 4officers, 40–56 enlisted
Armament:
Service record
Part of:
Commanders:
  • K.Kapt. Friedrich Deetz
  • 28 February 1942 – 8 January 1944
Operations: 5 patrols
Victories: 3 ships sunk for a total of 11,504 GRT

German submarine U-757 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. Laid down as yard number 140 at the Kriegsmarinewerft (KMW) in Wilhelmshaven, U-757 served with 6th U-boat Flotilla from 28 February 1942 to 8 January 1944 under the command of Korvettenkapitän Friedrich Deetz.[1]

Design[edit]

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-757 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.[2] 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).[2]

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).[2] 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-757 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 an anti-aircraft gun. The boat had a complement of between forty-four and sixty.[2]

Service history[edit]

U-757's first victims were the British transport vessel HMS LCT-2398 - destroying 291 tons of shipping - in the convoy HX 228, and the American merchant vessel William C. Gorgas- destroying a further 7,197 tons of shipping. Both incidents occurred on 11 March 1943, fourteen days into her twenty-five-day-long third patrol. Of the seventy-three crewmen on board the Gorgas, twenty-two perished.

On her fourth patrol, U-757 sank the Norwegian Fernhill on 7 August 1943, thirty-one days into her sixty-day patrol, 4,116 tons of shipping lost in the sea. Of the ship's forty-four crewmen, forty survived the attack, being rescued by the American tanker Idaho two days later.

Fate[edit]

On 8 January 1944 in the North Atlantic, south-west of Iceland, U-757 was hit by depth charges from the British frigate HMS Bayntun and the Canadian corvette HMCS Camrose. U-757 went down with all 49 seamen, at position 50°33′N 18°03′W / 50.550°N 18.050°W / 50.550; -18.050Coordinates: 50°33′N 18°03′W / 50.550°N 18.050°W / 50.550; -18.050.

Wolfpacks[edit]

U-757 took part in five wolfpacks, namely.

  • Panther (6–10 October 1942)
  • Neuland (4–12 March 1943)
  • Without name (11–29 July 1943)
  • Rügen 5 (6–7 January 1944)
  • Rügen (7–8 January 1944)

Summary of raiding history[edit]

Date Ship Nationality Tonnage[Note 1] Fate[3]
11 March 1943 William C. Gorgas  United States 7,197 Sunk
11 March 1943 HMS LCT-2398  Royal Navy 291 Sunk
7 August 1943 Fernhill  Norway 4,116 Sunk

References[edit]

Notes[edit]

  1. ^ Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

Citations[edit]

  1. ^ a b c d e f Helgason, Guðmundur. "The Type VIIC boat U-757". German U-boats of WWII - uboat.net. 
  2. ^ a b c d Gröner 1991, pp. 43-46.
  3. ^ Helgason, Guðmundur. "Ships hit by U-757". German U-boats of WWII - uboat.net. Retrieved 12 February 2014. 

Bibliography[edit]

  • Busch, Rainer; Röll, Hans-Joachim (1999). German U-boat commanders of World War II : a biographical dictionary. Translated by Brooks, Geoffrey. London, Annapolis, Md: Greenhill Books, Naval Institute Press. ISBN 1-55750-186-6. 
  • Busch, Rainer; Röll, Hans-Joachim (1999). Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945]. Der U-Boot-Krieg (in German). IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2. 
  • Edwards, Bernard (1996). Dönitz and the Wolf Packs - The U-boats at War. Cassell Military Classics. p. 173. ISBN 0-304-35203-9. 
  • Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4. 

External links[edit]