German_submarine_U-855

German submarine <i>U-855</i>

German submarine U-855

German World War II submarine

German submarine U-855 was a Type IXC/40 U-boat built for Nazi Germany's Kriegsmarine during World War II.

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Design

German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-855 had a displacement of 1,144 tonnes (1,126 long tons) when at the surface and 1,257 tonnes (1,237 long tons) while submerged.[1] 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 6.86 m (22 ft 6 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.67 m (15 ft 4 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 shaft horsepower (1,010 PS; 750 kW) 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).[1]

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).[1] 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 13,850 nautical miles (25,650 km; 15,940 mi) at 10 knots (19 km/h; 12 mph). U-855 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.[1]

Service history

U-855 was ordered on 5 June 1941 from DeSchiMAG AG Weser in Bremen under the yard number 1061. Her keel was laid down on 21 October 1942 and the U-boat was launched the following year on 17 April 1943. She was commissioned into service under the command of Kapitänleutnant Albert Sürenhagen (Crew 36) in 4th U-boat Flotilla.

On 3 April 1944 Sürenhagen handed over command to Oberleutnant zur See Prosper Ohlsen (Crew 36). U-855 transferred to the 10th U-boat Flotilla for front-line service and left Kiel for operations in the North Atlantic on 22 June 1944, but experienced engine problems which forced her to return to Kiel. The U-boat left Kiel again on 1 July and served as a weather boat in the North Atlantic until September 1944.

An attack on an unescorted freighter on 6 September 1944 was not successful. The next day U-855 met with U-516 and supplied her with provisions for twelve days. The following day, 9 September, she refuelled U-516 before making for port. Her last transmission was received on 11 September 1944, after that the U-boat was missing.[2]

Since U-855 would have had to pass through known mine barrages about a week into her return voyage. Since she failed to report the successful passage, as other U-boats would do, she was probably sunk by a mine in the Northern Barrage on 17 October. That day another U-boat in the vicinity, U-804 reported hearing an explosion of a mine. The previous assumption that U-855 was attacked and sunk by a British aircraft, Liberator 'A' of No. 224 Squadron RAF, on 24 September is not correct as this attack damaged U-763.[2]

References

  1. [1]
    Gröner 1991, p. 68.
  2. [2]
    Busch & Röll 1999, p. 291.

Bibliography

  • 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). Der U-Boot-Krieg, 1939-1945: Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945] (in German). Vol. IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2.
  • Gröner, Eric; Jung, Dieter; Maass, Martin (1991). German Warships 1815-1945: U-boats and Mine Warfare Vessels. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
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