German submarine ''U-771'' 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 It superseded the Imperial German Navy of the German Empire (1871–1918) and the inter-war (1919–1935) of the Weimar Republic.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 ...

. She was ordered on 21 November 1940, and 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 21 August 1942 at Kriegsmarinewerft,

Wilhelmshaven Wilhelmshaven (, ''Wilhelm's Harbour''; Northern Low Saxon: ''Willemshaven'') is a coastal town in Lower Saxony, Germany. It is situated on the western side of the Jade Bight, a bay of the North Sea, and has a population of 76,089. Wilhelmsha ...

, as yard number 154. She was launched on 26 September 1943 and commissioned under the command of ''

Oberleutnant zur See ''Oberleutnant zur See'' (''OLt zS'' or ''OLZS'' in the German Navy, ''Oblt.z.S.'' in the ''Kriegsmarine'') is traditionally the highest rank of Lieutenant in the German Navy. It is grouped as OF-1 in NATO. The rank was introduced in the Imper ...

'' Helmut Block on 18 November of that year.

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-771'' 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-771'' 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), one Flak M42 and two twin C/30 anti-aircraft guns. 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

''U-771'' had a comparatively brief service career. While she was commissioned on 18 November 1943, she was not assigned to any war flotillas until 1 June 1944. She was in action for less than a year before being sunk on 11 November 1944, after only two patrols at sea.

First patrol

Following training exercises with the 31st U-boat Flotilla from 18 November 1943 until 31 May 1944, ''U-771'' was assigned to the 9th U-boat Flotilla on 1 June 1944, and was given the position as the lead boat in the flotilla. The next day, ''U-771'' left the port city of Hatvik for

Bergen Bergen (), historically Bjørgvin, is a city and municipality in Vestland county on the west coast of Norway. , its population is roughly 285,900. Bergen is the second-largest city in Norway. The municipality covers and is on the peninsula of ...

occupied Norway The occupation of Norway by Nazi Germany during the Second World War began on 9 April 1940 after Operation Weserübung. Conventional armed resistance to the German invasion ended on 10 June 1940, and Nazi Germany controlled Norway until the ...

. On 21 June 1944, ''U-771'' began her first war patrol, leaving the port city of

Stavanger Stavanger (, , American English, US usually , ) is a city and municipalities of Norway, municipality in Norway. It is the fourth largest city and third largest metropolitan area in Norway (through conurbation with neighboring Sandnes) and the a ...

(at which she had arrived from Bergen the day before). For a period of 25 days, ''U-771'' roamed the

North Sea The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian S ...

in search of Allied convoys. While she never made contact with any enemy vessels, on 26 June 1944, a British

Consolidated Liberator The Consolidated B-24 Liberator is an American heavy bomber, designed by Consolidated Aircraft of San Diego, California. It was known within the company as the Model 32, and some initial production aircraft were laid down as export models des ...

aircraft coded 'N' from No. 86 Squadron RAF engaged ''U-771'' and just north of the British Isles. ''U-317'' was sunk during the action, but

flak 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, ...

from ''U-771'' damaged the Liberator and forced it back to base, where it was judged damaged beyond repair. ''U-771'' continued her patrol. This was the only time during the war that ''U-771'' had any contact with the enemy prior to her sinking.Preisler, Jerome (2012), Page 99 On 15 July, ''U-771'' returned to her U-boat base at Bergen.

Second patrol

''U-771'' spent the next three months travelling to various Norwegian ports, including

Trondheim Trondheim ( , , ; sma, Tråante), historically Kaupangen, Nidaros and Trondhjem (), is a city and municipality in Trøndelag county, Norway. As of 2020, it had a population of 205,332, was the third most populous municipality in Norway, and ...

Kristiansand Kristiansand is a seaside resort city and municipality in Agder county, Norway. The city is the fifth-largest and the municipality the sixth-largest in Norway, with a population of around 112,000 as of January 2020, following the incorporation ...

, Bogenbucht, and

Hammerfest Hammerfest (; sme, Hámmerfeasta ) is a municipality in Troms og Finnmark county, Norway. Hammerfest is the northernmost town in the world with more than 10,000 inhabitants. The administrative centre of the municipality is the town of Hammerfe ...

. During this time, ''U-771'' was reassigned to the 11th U-boat Flotilla on 1 August 1944; she remained a part of that flotilla until 30 September, when she was again reassigned, this time to the

13th U-boat Flotilla The 13th U-boat Flotilla (German ''13. Unterseebootsflottille'') was a World War II U-boat unit of Nazi Germany's ''Kriegsmarine'' stationed in Trondheim, Norway. The emblem of the unit was a cross with a Viking ship in the middle. History In 1 ...

. On 14 October 1944, ''U-771'' finally left Hammerfest and headed into the

Arctic Ocean The Arctic Ocean is the smallest and shallowest of the world's five major oceans. It spans an area of approximately and is known as the coldest of all the oceans. The International Hydrographic Organization (IHO) recognizes it as an ocean, a ...

. Twenty-nine days after she left Hammerfest, on 11 November 1944, ''U-771'' was sunk in the

Andfjord Andfjorden is a fjord on the border of Nordland and Troms og Finnmark counties in Norway. It primarily flows between the large islands of Andøya and Senja. Grytøya and the smaller islands Bjarkøya and Krøttøya are located in the fjord. The ...

near

Harstad ( se, Hárstták) is the second-most populated municipality in Troms og Finnmark county, Norway. It is mostly located on the large island of Hinnøya. The municipal center is the Harstad (town), town of Harstad, the most populous town in Centra ...

, Norway, by torpedoes fired by the British submarine . All 51 of her crewmembers were killed.

Wolfpacks

''U-771'' took part in three wolfpacks, namely: * Zorn (27 – 30 September 1944) * Regenschirm (14 – 16 October 1944) * Panther (16 October – 10 November 1944)

References

Bibliography

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External links

* {{DEFAULTSORT:U0771 German Type VIIC submarines U-boats commissioned in 1943 U-boats sunk in 1944 World War II submarines of Germany 1943 ships World War II shipwrecks in the Arctic Ocean Ships built in Wilhelmshaven U-boats sunk by British submarines Ships lost with all hands Maritime incidents in November 1944