Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-456 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.[2] 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 superchargeddiesel 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 Siemens-Schuckert GU 343/38–8 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).[2]
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).[2] 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-456 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 a 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.[2]
Service history
The boat's service began on 28 September 1941 with training as part of the 6th U-boat Flotilla. She was transferred to the 11th flotilla on 1 July 1942 and then to the 1st flotilla on 1 December 1942.
In 11 patrols she sank six ships for a total of 31,528 gross register tons (GRT), plus two ships damaged.
HMS Edinburgh
In the late afternoon of 30 April 1942, during the attack on the Arctic Convoy QP 11, two of her torpedoes struck and crippled the Royal Navy light cruiser HMS Edinburgh. At the time Edinburgh was carrying many tons of gold bullion from the USSR destined for the UK.
In the early morning light U-456 was caught on the surface by an RAF Coastal CommandLiberator bomber of 86 Squadron operating out of Northern Ireland, as she circled ahead of convoy HX 237. U-456 dived at once, but not before the aircraft had launched the new American Fido acoustic homing torpedo at the submerged submarine. The aircraft, low on fuel, was unable to press home the attack. U-456 was badly damaged and forced to re-surface. On the following day she was depth charged and sunk on 12 May 1943 at position 46° 39' N 26° 54' W by HMS Opportune.
^Helgason, Guðmundur. "Ships hit by U-456". German U-boats of WWII - uboat.net. Retrieved 28 April 2014.
Bibliography
Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. Vol. II. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN0-85177-593-4.
Further reading
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. ISBN1-55750-186-6.
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. ISBN3-8132-0514-2.
Edwards, Bernard (1996). Dönitz and the Wolf Packs – The U-Boats at War. London: Cassell Military Classics. pp. 141, 208, 210, 211. ISBN0-304-35203-9.
External links
Helgason, Guðmundur. "The Type VIIC boat U-456". German U-boats of WWII - uboat.net. Retrieved 27 December 2014.
