German submarine ''U-427'' was a Type VIIC

U-boat U-boats are Submarine#Military, naval submarines operated by Germany, including during the World War I, First and Second World Wars. The term is an Anglicization#Loanwords, anglicized form of the German word , a shortening of (), though the G ...

Nazi Germany Nazi Germany, officially known as the German Reich and later the Greater German Reich, was the German Reich, German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a Totalit ...

's ''

Kriegsmarine The (, ) was the navy of Nazi 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 It superseded the Imperial German Navy of the German Empire (1871–1918) and the inter-war (1919–1935) of the Weimar Republic.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 military branch, branche ...

'' during

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. ''U-427'' 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 ''superstructure'' and the ''pressure hull''. The external portion of a submarine’s hull—that part that does not resist sea pressure and is free-flooding—is known as the “superstructure” i ...

length of , a beam of , a height of , and a draught of . The submarine was powered by two

Germaniawerft Friedrich Krupp Germaniawerft (often just called Germaniawerft, "Germania (personification), Germania shipyard") was a German shipbuilding company, located in the harbour at Kiel, and one of the largest and most important builders of U-boats for ...

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. It is a form of forced induction that is mechanically powered (usually by ...

diesel engine The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...

s producing a total of for use while surfaced, two

Siemens-Schuckert Siemens-Schuckert (or Siemens-Schuckertwerke) was a German electrical engineering company headquartered in Berlin, Erlangen and Nuremberg that was incorporated into the Siemens AG in 1966. Siemens Schuckert was founded in 1903 when Siemens & H ...

GU 343/38–8 double-acting electric motors producing a total of for use while submerged. She had two shafts and two

propeller A propeller (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 a working flu ...

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-427'' 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, with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, such ...

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

anti-aircraft gun Anti-aircraft warfare (AAW) is the counter to aerial warfare and includes "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It encompasses surface-based, subsurface ( submarine-launched), and air-ba ...

s. The boat had a

complement Complement may refer to: The arts * Complement (music), an interval that, when added to another, spans an octave ** Aggregate complementation, the separation of pitch-class collections into complementary sets * Complementary color, in the visu ...

of between forty-four and sixty.

Service history

Built by Danziger Werft, Danzig, the U-boat 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 ...

on 27 July 1942, launched on 6 February 1943 and commissioned on 2 June 1943 with a crew of 53 under their Austrian commander ''

Oberleutnant (English: First Lieutenant) is a senior lieutenant Officer (armed forces), officer rank in the German (language), German-speaking armed forces of Germany (Bundeswehr), the Austrian Armed Forces, and the Swiss Armed Forces. In Austria, ''Oberle ...

'' Carl-Gabriel

Graf (; feminine: ) is a historical title of the German nobility and later also of the Russian nobility, usually translated as "count". Considered to be intermediate among noble ranks, the title is often treated as equivalent to the British title ...

von Gudenus. It survived until the end of the war. Most

s achieved notoriety for the number of kills they achieved, or the total tonnage of the vessels they sank, but in the case of ''U-427'' fame was achieved differently.U-Boat Operations: U-427
, ubootwaffe.net From its first voyage, on 20 June 1944, until the end of the war, ''U-427'' never destroyed any of its targets. It fired

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

at two vessels, and on 29 April 1945, missing both, but it was for its ability to survive under harrowing circumstances that ''U-427'' became known. In April 1945, leading up to, during, and after those two attacks, ''U-427'' survived 678

depth charge A depth charge is an anti-submarine warfare (ASW) weapon designed to destroy submarine A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited ...

attempts. On 2 May 1945, ''U-427'' returned to its base at Kilbotn, Norway, where it remained for the few remaining days before Germany's surrender.Ship details: HMCS ''Iroquois''
, ubootwaffe.net ''U-427'' surrendered at

Narvik () is the third-largest List of municipalities of Norway, municipality in Nordland Counties of Norway, county, Norway, by population. The administrative centre of the municipality is the Narvik (town), town of Narvik. Some of the notable villag ...

, Norway, on 9 May 1945, and was transferred to

Loch Eriboll __NOTOC__ Loch Eriboll (Scottish Gaelic: "Loch Euraboil") is a long sea loch on the north coast of Scotland, which has been used for centuries as a deep water anchorage as it is safe from the often stormy seas of Cape Wrath and the Pentland Fir ...

, Scotland, on 19 May, and later to

Loch Ryan Loch Ryan (, ) is a Scottish sea loch that acts as an important natural harbour for shipping, providing calm waters for ferries operating between Scotland and Northern Ireland. The town of Stranraer is the largest settlement on its shores, wi ...

as part of " Operation Deadlight" when it was sunk on 21 December 1945 at .

References

Bibliography

* * *

External links

* {{DEFAULTSORT:U0427 German Type VIIC submarines U-boats commissioned in 1943 World War II submarines of Germany U-boats sunk in 1945 1943 ships Operation Deadlight Ships built in Danzig Maritime incidents in December 1945