German submarine U-1230
|Career (Nazi Germany)|
|Ordered:||14 October 1941|
|Builder:||Deutsche Werft, Hamburg|
|Yard number:||Werk 397|
|Laid down:||15 March 1943|
|Launched:||8 November 1943|
|Commissioned:||26 January 1944|
|Fate:||Surrendered, 8 May 1945|
|General characteristics |
|Type:||Type IXC/40 submarine|
|Displacement:||1,144 t (1,126 long tons) surfaced
1,257 t (1,237 long tons) submerged
|Length:||76.76 m (251 ft 10 in) o/a
58.75 m (192 ft 9 in) pressure hull
|Beam:||6.86 m (22 ft 6 in) o/a 4.44 m (14 ft 7 in) pressure hull|
|Height:||9.6 m (31 ft 6 in)|
|Draft:||4.67 m (15 ft 4 in)|
|Propulsion:||2 × MAN M 9 V 40/46 supercharged 9-cylinder diesel engines, 4,400 hp (3,281 kW)
2 × SSW GU 345/34 double-acting electric motors, 1,000 hp (746 kW)
|Speed:||19 knots (35 km/h; 22 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 nautical miles (117 km; 72 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
|Test depth:||230 m (750 ft)|
|Complement:||4 officers, 44 enlisted|
|Commanders:||Kptlt. Hans Hilbig|
|Victories:||1 ship 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, Norway, returning safely to Kristiansand, Norway in early 1945.
Its one war patrol was of historical interest less for its role in the Battle of the Atlantic (a Canadian steamer of 5,458 tons was its sole victim), than for its role in transporting two German spies to the United States.
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 sabotage the Manhattan Project but failed, and both spies were captured.
At the end of the war it was captured by the Allies, transferred to Loch Ryan in Scotland, and destroyed by the Royal Navy frigate 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 Career
|Date||Ship Name||Nationality||Tonnage (GRT)||Fate|
|3 December 1944||Cornwallis||Canada||5,458||Sunk|
- 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 (1985). U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher. Die deutschen Kriegsschiffe 1815-1945 (in German) III (Koblenz: Bernard & Graefe). ISBN 3-7637-4802-4.
- uboat.net webpage on U-1230
- ibiblio.org webpage for Allied report on the interrogations of Gimpel and Colepaugh