German submarine U-715

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History
Nazi Germany
Name: U-715
Ordered: 10 April 1941
Builder: H. C. Stülcken Sohn, Hamburg
Yard number: 781
Laid down: 28 March 1942
Launched: 14 December 1942
Commissioned: 17 March 1943
Fate: Sunk by Canadian aircraft off Faeroe on 13 June 1944
General characteristics
Class and type: Type VIIC submarine
Displacement:
  • 769 t (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: 4 officers, 40–56 enlisted
Armament:
Service record
Identification codes: M 51 222
Commanders: Oblt.z.S. Helmut Röttger
Operations: 1 war patrol
Victories: no ships sunk

German submarine U-715 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 28 March 1942 at the H. C. Stülcken Sohn yard at Hamburg, launched on 14 December 1942, and commissioned on 17 March 1943 under the command of Oberleutnant zur See Helmut Röttger.

Attached to 5th U-boat Flotilla based at Kiel, U-715 completed her training period on 31 May 1944 and was assigned to front-line service.

Design[edit]

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-715 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-715 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]

Service history[edit]

On the first and final patrol, U-715 was spotted north-east of Faeroe on 13 June 1944 by Canso T of No. 162 Squadron RCAF and attacked with depth charges while snorkeling at periscope depth. Heavily damaged, the U-boat surfaced and returned fire, managing to down the Canadian aircraft before sinking in position 62°55′N 2°59′W / 62.917°N 2.983°W / 62.917; -2.983Coordinates: 62°55′N 2°59′W / 62.917°N 2.983°W / 62.917; -2.983. This was the first occasion when a submerged U-boat was detected and attacked. Of the crew of 52, only 16 survived.[2]

References[edit]

  1. ^ a b c d Gröner 1991, pp. 43-46.
  2. ^ Busch, Röll 1999, p. 258.

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. 
  • 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]