German submarine U-307

















































































































History

Nazi Germany
Name:
U-307
Ordered:
20 January 1941
Builder:
Flender Werke, Lübeck
Yard number:
307
Laid down:
5 November 1941
Launched:
30 September 1942
Commissioned:
18 November 1942
Fate:
Sunk by depth charges, 29 April 1945[1]
General characteristics
Class and type:
Type VIIC submarine
Displacement:

  • 769 tonnes (757 long tons) surfaced

  • 871 t (857 long tons) submerged
Length:

  • 67.10 m (220 ft 2 in) o/a

  • 50.50 m (165 ft 8 in) pressure hull
Beam:

  • 6.20 m (20 ft 4 in) o/a

  • 4.70 m (15 ft 5 in) pressure hull
Height:
9.60 m (31 ft 6 in)
Draught:
4.74 m (15 ft 7 in)
Installed power:

  • 2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels)

  • 750 PS (550 kW; 740 shp) (electric)
Propulsion:

  • 2 shafts

  • 2 × diesel engines

  • 2 × electric motors
Speed:

  • 17.7 knots (32.8 km/h; 20.4 mph) surfaced

  • 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range:

  • 8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced

  • 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:

  • 230 m (750 ft)


  • Crush depth: 250–295 m (820–968 ft)
Complement:
4 officers, 40–56 enlisted
Armament:

  • 5 × 53.3 cm (21 in) torpedo tubes (four bow, one stern)

  • 14 × torpedoes or 26 TMA mines

  • 1 × 8.8 cm (3.46 in) deck gun (220 rounds)

  • 2 × twin 2 cm (0.79 in) C/30 anti-aircraft guns
Service record
Part of:

  • 8th U-boat Flotilla

  • 18 November 1942 – 30 April 1943

  • 11th U-boat Flotilla

  • 1 May – 31 October 1943

  • 13th U-boat Flotilla

  • 1 November 1943 – 29 April 1945
Commanders:


  • Oblt.z.S. Friedrich-Georg Herrle

  • 18 November 1942 – 1 December 1944


  • Oblt.z.S. Erich Krüger

  • 2 December 1944 – 29 April 1945
Operations:
13 patrols
Victories:
2 vessels (7,226 GRT)

German submarine U-307 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The U-boat was laid down on 5 November 1941, and commissioned on 18 November 1942.




Contents






  • 1 Design


  • 2 Service history


    • 2.1 Wolfpacks




  • 3 Fate


  • 4 Summary of raiding history


  • 5 References


  • 6 Bibliography


  • 7 External links





Design


German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-307 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 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 Garbe, Lahmeyer & Co. RP 137/c 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-307 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 two twin 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.[2]



Service history


Despite carrying out 13 war patrols between July 1943 and April 1945, U-307 sank only two vessels; the 7,176-ton American Liberty ship SS William S. Thayer on 30 April 1944, fifty miles south of Bear Island, and the 50-ton Norwegian Army motor boat Lennox in Van Mijenfjorden, Spitsbergen, on 18 August 1944.


In September 1944, together with the supply ship Carl J. Busch, U-307 transported the men of Operation Haudegen, a German military meteorological mission, to Svalbard.



Wolfpacks


U-307 took part in twelve wolfpacks, namely.



  • Wiking (5 September – 8 October 1943)


  • Monsun (3 October – 23 November 1943)

  • Eisenbart (28 October – 8 December 1943)

  • Boreas (28 February – 10 March 1944)

  • Thor (17–26 March 1944)

  • Donner (17–20 April 1944)

  • Donner & Keil (20 April – 3 May 1944)

  • Grimm (31 May - 6 June 1944)

  • Trutz (8 June – 10 July 1944)

  • Rasmus (6–13 February 1945)

  • Hagen (13–21 March 1945)

  • Faust (21–29 April 1945)



Fate


U-307 was sunk on 29 April 1945 in the Barents Sea near Murmansk, Russia, in position 69°24′N 33°44′E / 69.400°N 33.733°E / 69.400; 33.733Coordinates: 69°24′N 33°44′E / 69.400°N 33.733°E / 69.400; 33.733 by depth charges from the British Loch class frigate HMS Loch Insh. There were 37 dead and 14 survivors.



Summary of raiding history
























Date
 Ship Name
 Nationality
 Displacement
 Fate[3]
30 April 1944
William S. Thayer
 United States
 7,176
 Sunk
18 August 1944
Lennox
 Norway
 50
 Sunk


References





  1. ^ Kemp 1999, p. 254.


  2. ^ abcd Gröner 1991, pp. 43-46.


  3. ^ Helgason, Guðmundur. "Ships hit by U-307". German U-boats of WWII - uboat.net. Retrieved 26 December 2014..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}




Bibliography


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  • 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). 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.




External links




  • Helgason, Guðmundur. "The Type VIIC boat U-307". German U-boats of WWII - uboat.net. Retrieved 26 December 2014.


  • Hofmann, Markus. "U 307". Deutsche U-Boote 1935-1945 - u-boot-archiv.de (in German). Retrieved 26 December 2014.















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