German submarine U-457
|Ordered:||16 January 1940|
|Builder:||Deutsche Werke, Kiel|
|Laid down:||26 October 1940|
|Launched:||4 October 1941|
|Commissioned:||5 November 1941|
|Fate:||Sunk northeast of the North Cape by a British warship, September 1942|
|Class & type:||Type VIIC submarine|
|Height:||9.60 m (31 ft 6 in)|
|Draft:||4.74 m (15 ft 7 in)|
|Complement:||4 officers, 40–56 enlisted|
She carried out three patrols. She sank two ships and damaged one more.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-457 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. 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 supercharged diesel 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).
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). 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-457 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 an anti-aircraft gun. The boat had a complement of between forty-four and sixty.
The submarine was laid down on 26 October 1941 in the Deutsche Werke, Kiel as yard number 288, launched on 4 October 1941 and commissioned on 5 November under the command of Korvettenkapitän Karl Brandenburg.
She sank the Christopher Newport 35 nautical miles (65 km; 40 mi) east of Bear Island on 4 July. The ship, from the ill-fated convoy PQ-17, had already been hit by an aerial torpedo in the Barents Sea. A 'coup de gráce' torpedo from the British submarine P-614 failed to sink the ship; but one from U-457 succeeded.
The boat then went on to sink the Aldersdale on 7 July 1942; after the merchantman, also a member of PQ-17, had been bombed. U-457 came across the abandoned tanker and after firing 75 rounds from her deck gun, finished the wreck off with a single torpedo.
Her second foray was relatively uneventful - starting in Narvik on 8 August 1942 and finishing in Trondheim on 7 September.
3rd patrol and loss
Forty-five men died in U-457; there were no survivors.
U-457 took part in two wolfpacks, namely.
- Eisteufel (30 June - 12 July 1942)
- Trägertod (12–16 September 1942)
Summary of raiding history
|4 July 1942||Christopher Newport||United States||7,191||Sunk|
|7 July 1942||Aldersdale||Royal Fleet Auxiliary||8,402||Sunk|
|14 September 1942||Atheltemplar||United Kingdom||8,939||Damaged|
- Kemp 1999, p. 90.
- Helgason, Guðmundur. "The Type VIIC boat U-457". German U-boats of WWII - uboat.net. Retrieved 24 September 2012.
- Gröner 1991, pp. 43-46.
- The Times Atlas of the World - Third edition, revised 1995, ISBN 0 7230 0809 4, p. 24
- Helgason, Guðmundur. "Ships hit by U-454". German U-boats of WWII - uboat.net. Retrieved 27 December 2014.
- 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; 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 VIIC boat U-457". German U-boats of WWII - uboat.net. Retrieved 27 December 2014.