German submarine U-707

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History
Nazi Germany
Name: U-706
Operator: Kriegsmarine
Ordered: 9 October 1939
Builder: H. C. Stülcken Sohn, Hamburg
Yard number: 771
Launched: 18 December 1941
Commissioned: 1 July 1942
Fate: Sunk on 9 November 1943 off the Azores at 40°31′N 20°17′W / 40.517°N 20.283°W / 40.517; -20.283Coordinates: 40°31′N 20°17′W / 40.517°N 20.283°W / 40.517; -20.283
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:
Propulsion:
  • 2 × shafts
  • 2 × 1.23 m (4 ft 0 in) propellers
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 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph)
Test depth:
  • 230 m (750 ft)
  • Crush depth: 250–295 m (820–968 ft)
Complement: 44–60 officers & ratings
Armament:

German submarine U-707 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

Ordered 6 August 1940, she was laid down 2 January 1941 and launched 18 December 1941. She had a relatively brief career from 1 July 1942 to 9 November 1943, and during this time she was commanded by Oberleutnant zur See Günther Gretschel.

Design[edit]

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-707 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 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).[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-707 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.[1]

Patrol History[edit]

During her career, U-707 sunk two ships, for a total tonnage of 11,811 GRT, namely the US freighter Jonathan Sturges, a straggler of convoy ON 166, and the British freighter North Britain also a straggler of convoy ONS 5.

She participated in nine wolfpacks, namely,

  • Haudegen (26 January – 2 February 1943)
  • Nordsturm (2–9 February 1943)
  • Haudegen (9–15 February 1943) rejoined
  • Taifun (15–20 February 1943)
  • Specht (19 April – 4 May 1943)
  • Fink (4–6 May 1943)
  • Naab (12–15 May 1943)
  • Donau 2 (15–26 May 1943)
  • Schill (25 October – 9 November 1943)

Fate[edit]

While on patrol east of the Azores, she was depth charged and sunk on 9 November 1943 from a RAF Fortress aircraft, from Sqdn. 220/J R.A.F, at position 40°31′N 20°17′W / 40.517°N 20.283°W / 40.517; -20.283. She was lost with all hands; 51 dead.

Summary of raiding history[edit]

Date Ship Name Nationality Tonnage (GRT) Fate[2]
24 February 1943 Jonathan Sturges  United States 7,176 Sunk
5 May 1943 North Britain  United Kingdom 4,635 Sunk

References[edit]

  1. ^ a b c d Gröner 1991, pp. 43-46.
  2. ^ Helgason, Guðmundur. "Ships hit by U-707". German U-boats of WWII - uboat.net. Retrieved 9 February 2014. 

Bibliography[edit]

  • Busch, Rainer; Röll, Hans-Joachim (1999). Deutsche U-Boot-Verluste von September 1939 bis Mai 1945. Der U-Boot-Krieg (in German). IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2. 
  • 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]