U-505, a typical Type IXC boat
|Ordered:||7 August 1939|
|Builder:||DeSchiMAG AG Weser, Bremen|
|Laid down:||1 September 1940|
|Launched:||1 April 1941|
|Commissioned:||1 July 1941|
|Fate:||Scuttled, 17 December 1941|
|Class and type:||Type IXC submarine|
|Height:||9.60 m (31 ft 6 in)|
|Draught:||4.70 m (15 ft 5 in)|
|Test depth:||230 m (750 ft)|
|Complement:||4 officers, 44 enlisted|
|Operations:||1st patrol: 27 November – 17 December 1941|
|Victories:||One commercial ships sunk (4,016 GRT)|
German Type IXC submarines were slightly larger than the original Type IXBs. U-131 had a displacement of 1,120 tonnes (1,100 long tons) when at the surface and 1,232 tonnes (1,213 long tons) while submerged. The U-boat had a total length of 76.76 m (251 ft 10 in), a pressure hull length of 58.75 m (192 ft 9 in), a beam of 6.76 m (22 ft 2 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.70 m (15 ft 5 in). The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of 4,400 metric horsepower (3,240 kW; 4,340 shp) for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1,000 metric horsepower (740 kW; 990 shp) for use while submerged. She had two shafts and two 1.92 m (6 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 18.3 knots (33.9 km/h; 21.1 mph) and a maximum submerged speed of 7.3 knots (13.5 km/h; 8.4 mph). When submerged, the boat could operate for 63 nautical miles (117 km; 72 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 13,450 nautical miles (24,910 km; 15,480 mi) at 10 knots (19 km/h; 12 mph). U-131 was fitted with six 53.3 cm (21 in) torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one 10.5 cm (4.13 in) SK C/32 naval gun, 180 rounds, and a 3.7 cm (1.5 in) SK C/30 as well as a 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of forty-eight.
On 6 December she torpedoed and sank the 4,016 ton British cargo ship Scottish Trader, a straggler from convoy SC 56, en route from Philadelphia to Liverpool, south of Iceland. All 43 of the crew perished.
On 17 December U-131 was spotted by a Grumman Martlet aircraft from the escort carrier HMS Audacity while shadowing Convoy HG 76 as part of the Seeräuber (English: "Pirate", lit. "Sea Robber") wolfpack.
U-131 was forced to dive, while ships of the 36th Escort Group, commanded by Frederic John Walker in HMS Stork, with four other escorts, including the destroyers HMS Exmoor, Blankney and Stanley and the corvette Pentstemon, approached to continue the attack. Detected by Stanley's ASDIC (sonar), she was depth charged by Pentstemon, and forced to surface, due to chlorine gas coming from the batteries. Unable to dive, she attempted to escape by running at full speed on the surface. While under pursuit U-131 shot down an attacking Martlet aircraft, killing the pilot, but was then shelled by the escort group, which scored several hits. Realizing that the situation was hopeless, the crew abandoned the U-boat and scuttled her. All 47 of the crew survived and were taken prisoner.
U-131 took part in one wolfpack, namely.
- Seeräuber (14–17 December 1941)
Summary of raiding history
|6 December 1941||Scottish Trader||United Kingdom||4,016||Sunk|
- Kemp 1999, pp. 75-6.
- Gröner 1991, p. 68.
- Helgason, Guðmundur. "Patrol of U-boat U-131 from 27 Nov 1941 to 17 Dec". U-boat patrols - uboat.net. Retrieved 31 January 2015.
- Helgason, Guðmundur. "Scottish Trader (Steam merchant)". Ships hit by U-boats - uboat.net. Retrieved 31 January 2015.
- Helgason, Guðmundur. "Wolfpack Seeräuber". Wolfpacks - U-boat Operations - uboat.net. Retrieved 31 January 2015.
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- 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.
- Kemp, Paul (1999). U-Boats Destroyed - German Submarine Losses in the World Wars. London: Arms & Armour. ISBN 1-85409-515-3.
- Helgason, Guðmundur. "The Type IXC boat U-131". German U-boats of WWII - uboat.net. Retrieved 31 January 2015.
- Hofmann, Markus. "U 131". Deutsche U-Boote 1935-1945 - u-boot-archiv.de (in German). Retrieved 31 January 2015.