German submarine ''U-307'' was a Type VIIC

U-boat U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic warfare role ...

Nazi Germany Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was ...

's ''

Kriegsmarine The (, ) was the navy of Germany from 1935 to 1945. It superseded the Imperial German Navy of the German Empire (1871–1918) and the inter-war (1919–1935) of the Weimar Republic. The was one of three official branches, along with the a ...

'' during

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

. The

was

laid down Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship. Keel laying is one o ...

on 5 November 1941, and commissioned on 18 November 1942.

Design

German Type VIIC submarines German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ger ...

were preceded by the shorter Type VIIB submarines. ''U-307'' had a displacement of when at the surface and while submerged. She had a total length of , a

pressure hull A submarine hull has two major components, the ''light hull'' and the ''pressure hull''. The light hull (''casing'' in British usage) of a submarine is the outer non-watertight hull which provides a hydrodynamically efficient shape. The pressure ...

length of , a

beam Beam may refer to: Streams of particles or energy *Light beam, or beam of light, a directional projection of light energy **Laser beam *Particle beam, a stream of charged or neutral particles **Charged particle beam, a spatially localized grou ...

of , a height of , and a draught of . The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder

supercharged In an internal combustion engine, a supercharger compresses the intake gas, forcing more air into the engine in order to produce more power for a given displacement. The current categorisation is that a supercharger is a form of forced induct ...

diesel engine The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-call ...

s producing a total of for use while surfaced, two Garbe, Lahmeyer & Co. RP 137/c double-acting electric motors producing a total of for use while submerged. She had two shafts and two

propeller A propeller (colloquially often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon ...

s. The boat was capable of operating at depths of up to . The submarine had a maximum surface speed of and a maximum submerged speed of . When submerged, the boat could operate for at ; when surfaced, she could travel at . ''U-307'' was fitted with five

torpedo tube A torpedo tube is a cylindrical device for launching torpedoes. There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboa ...

s (four fitted at the bow and one at the stern), fourteen

torpedo A modern torpedo is an underwater ranged weapon launched above or below the water surface, self-propelled towards a target, and with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, su ...

es, one SK C/35 naval gun, 220 rounds, and two twin C/30

anti-aircraft gun Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It includes surface based, ...

s. The boat had a

complement A complement is something that completes something else. Complement may refer specifically to: The arts * Complement (music), an interval that, when added to another, spans an octave ** Aggregate complementation, the separation of pitch-class ...

of between forty-four and sixty.

Service history

Despite carrying out 13 war patrols between July 1943 and April 1945, ''U-307'' sank only two vessels; the 7,176 GRT American

Liberty ship Liberty ships were a class of cargo ship built in the United States during World War II under the Emergency Shipbuilding Program. Though British in concept, the design was adopted by the United States for its simple, low-cost construction. Mass ...

on 30 April 1944, fifty miles south of Bear Island, and the 50 GRT

Norwegian Army The Norwegian Army ( no, Hæren) is the land warfare service branch of the Norwegian Armed Forces. The Army is the oldest of the Norwegian service branches, established as a modern military organization under the command of the King of Norway ...

motor boat ''Lennox'' in

Van Mijenfjorden Van Mijenfjorden is the third-longest fjord in Norway's Svalbard archipelago. It lies in the southern portion of Spitsbergen island, south of Nordenskiöld Land and north of Nathorst Land. The fjord is long, being separated from Bellsund further ...

Spitsbergen Spitsbergen (; formerly known as West Spitsbergen; Norwegian: ''Vest Spitsbergen'' or ''Vestspitsbergen'' , also sometimes spelled Spitzbergen) is the largest and the only permanently populated island of the Svalbard archipelago in northern Norw ...

, on 18 August 1944. In September 1944, together with the supply ship '' Carl J. Busch'', ''U-307'' transported the men of

Operation Haudegen Operation Haudegen ( peration Broadsword was the name of a Nazi Germany, German operation during the Second World War to establish meteorological stations on Svalbard. In September 1944, the submarine ''U-307'' and the supply ship ''Carl J. ...

, a German military meteorological mission, to

Svalbard Svalbard ( , ), also known as Spitsbergen, or Spitzbergen, is a Norwegian archipelago in the Arctic Ocean. North of mainland Europe, it is about midway between the northern coast of Norway and the North Pole. The islands of the group range ...

Wolfpacks

''U-307'' took part in twelve wolfpacks, namely: * Wiking (5 September – 8 October 1943) *

Monsun Monsun (4 March 1990 – 9 September 2012) was a bay Thoroughbred racehorse and stallion bred in Germany by Gestüt Isarland and owned by Baron Georg von Ullmann. Background Monsun was a son of Germany's first triple crown winner and champion ...

(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 The Barents Sea ( , also ; no, Barentshavet, ; russian: Баренцево море, Barentsevo More) is a marginal sea of the Arctic Ocean, located off the northern coasts of Norway and Russia and divided between Norwegian and Russian territo ...

near

Murmansk Murmansk (Russian: ''Мурманск'' lit. "Norwegian coast"; Finnish: ''Murmansk'', sometimes ''Muurmanski'', previously ''Muurmanni''; Norwegian: ''Norskekysten;'' Northern Sámi: ''Murmánska;'' Kildin Sámi: ''Мурман ланнҍ'') i ...

, Russia, in position by depth charges from the British

Loch class frigate The Loch class was a class of anti-submarine (A/S) frigate built for the Royal Navy and her Allies during World War II. They were an innovative design based on the experience of three years of fighting in the Battle of the Atlantic and att ...

. There were 37 dead and 14 survivors.

Summary of raiding history

References

Bibliography

* * * *

External links

* * {{DEFAULTSORT:U0307 German Type VIIC submarines World War II submarines of Germany World War II shipwrecks in the Arctic Ocean U-boats commissioned in 1942 1942 ships U-boats sunk by depth charges U-boats sunk by British warships U-boats sunk in 1945 Ships built in Lübeck Maritime incidents in April 1945