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German submarine U-1230

Summary

German submarine U-1230 was a Type IXC/40 U-boat of Nazi Germany's Kriegsmarine during World War II.

History
Nazi Germany
NameU-1230
Ordered14 October 1941
BuilderDeutsche Werft, Hamburg
Yard number393
Laid down15 March 1943
Launched8 November 1943
Commissioned26 January 1944
Fate
General characteristics
Class and typeType IXC/40 submarine
Displacement
  • 1,144 t (1,126 long tons) surfaced
  • 1,257 t (1,237 long tons) submerged
Length
Beam
  • 6.86 m (22 ft 6 in) o/a
  • 4.44 m (14 ft 7 in) pressure hull
Height9.60 m (31 ft 6 in)
Draught4.67 m (15 ft 4 in)
Installed power
  • 4,400 PS (3,200 kW; 4,300 bhp) (diesels)
  • 1,000 PS (740 kW; 990 shp) (electric)
Propulsion
Speed
  • 18.3 knots (33.9 km/h; 21.1 mph) surfaced
  • 7.3 knots (13.5 km/h; 8.4 mph) submerged
Range
  • 13,850 nmi (25,650 km; 15,940 mi) at 10 knots (19 km/h; 12 mph) surfaced
  • 63 nmi (117 km; 72 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth230 m (750 ft)
Complement4 officers, 44 enlisted
Armament
Service record
Part of:
Identification codes: M 42 644
Commanders:
  • Kptlt. Hans Hilbig
  • 26 January 1944 – 5 May 1945
Operations:
  • 1 patrol:
  • a. 8 October 1944 – 13 February 1945
  • b. 20 – 23 February 1945
Victories: 1 merchant ship sunk
(5,458 GRT)

Laid down on 15 March 1943 at the Deutsche Werft in Hamburg, and commissioned on 26 January 1944 under the command of Kapitänleutnant Hans Hilbig, it only undertook one patrol, operating from Horten Naval Base, Norway, returning safely to Kristiansand, Norway in early 1945.

Design edit

German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-1230 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-1230 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) Flak M42 as well as two twin 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of forty-eight.[1]

Service history edit

Its one war patrol was of historical interest less for its role in the Battle of the Atlantic (a Canadian steamer of 5,458 Gross register tonnage was its sole victim), than for its role in transporting two German spies to the United States.

Operation Magpie edit

William Curtis Colepaugh and Eric Gimpel were landed at Hancock Point in the Gulf of Maine on 29 November 1944 in Operation Elster ("Magpie"). The mission was intended to gather technical intelligence but failed, and both spies were captured.

Fate edit

At the end of the war it was captured by the Allies, transferred to Loch Ryan in Scotland, and sunk on 17 December 1945 by the Royal Navy frigate HMS Cubitt as part of "Operation Deadlight". Unusually for a U-boat, U-1230 does not seem to have suffered any casualties during the war.

Summary of raiding history edit

Date Ship Name Nationality Tonnage (GRT) Fate[2]
3 December 1944 Cornwallis   Canada 5,458 Sunk

References edit

  1. ^ a b c d Gröner 1991, p. 68.
  2. ^ Helgason, Guðmundur. "Ships hit by U-1230". German U-boats of WWII – uboat.net. Retrieved 17 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). Vol. IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2.
  • Gröner, Erich; 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.

External links edit

  • Helgason, Guðmundur. "The Type IXC/40 boat U-1230". German U-boats of WWII – uboat.net. Retrieved 29 December 2014.
  • ibiblio.org webpage for Allied report on the interrogations of Gimpel and Colepaugh

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