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U-boat is an anglicised version of the German word U-Boot, a shortening of Unterseeboot, literally "undersea boat". [1]

195 relations: Aces of the Deep, Action of 22 September 1914, Air-independent propulsion, Alan Turing, Allies of World War I, Allies of World War II, Americas, Anglo-German Naval Agreement, Arctic, Arms race, Atlantic Ocean, August Howaldt, Austria-Hungary, Austro-Hungarian Navy, Baltic Sea, Battle of Jutland, Battle of the Atlantic, Battleship, Beachy Head, Bell Island (Newfoundland and Labrador), Biber (submarine), Blockade, Bold (decoy), Bombe, Brandtaucher, British Empire, Cargo ship, Coastal submarine, Colin Grazier, Commerce raiding, Computer, Crash dive, Cruiser, Das Boot, Deck gun, Denmark, Depth charge, Destroyer, Detonation, Deutsches Museum, Diesel engine, Diplomacy, Dredging, Engineer, Enigma machine, Escort carrier, Fanfare (decoy), Ferromagnetism, First Happy Time, Foxer, ..., Friedrich Krupp Germaniawerft, Fuel cell, G7e torpedo, G7es torpedo, Gal-class submarine, Gallipoli Campaign, German Navy, German submarine U-103, German Type Mittel U submarine, German Type U 139 submarine, German Type U 151 submarine, German Type U 31 submarine, German Type U 66 submarine, German Type UB I submarine, German Type UB II submarine, German Type UB III submarine, German Type UC I submarine, German Type UC II submarine, German Type UC III submarine, German Type UE I submarine, German Type UE II submarine, Grand Fleet, Greece, Gulf of Mexico, Hai (midget submarine), Harwich, Hedgehog (weapon), Herbert Werner, High Seas Fleet, High-frequency direction finding, Hydrogen, Hydrogen peroxide, Imperial German Navy, Inventor, Israeli Navy, Karl Dönitz, Karp-class submarine, Körting Hannover, Kerosene, Kiel, Kobold, Kriegsmarine, Krupp, Leigh Light, List of Knight's Cross of the Iron Cross recipients of the U-boat service, List of most successful German U-boats, List of most successful U-boat commanders, List of U-boats never deployed, List of U-boats of Germany, Loch Ryan, Londonderry Port, Magnetic anomaly detector, Magnetic pistol, Möltenort U-Boat Memorial, Midget submarine, Molch, Monsun Gruppe, Museum of Science and Industry (Chicago), Museum ship, Naval mine, Newfoundland and Labrador, Nuclear submarine, Operation Weserübung, Ore, Orkney Wireless Museum, Paris Peace Conference, 1919, Penang, Periscope, Pre-dreadnought battleship, Prize (law), Q-ship, Radar, Reinhard Scheer, RMS Olympic, Royal Navy, Russia, Russian submarine Forel, Russo-Japanese War, Seehund, Shock wave, Sieglinde (decoy), Silent Hunter III, Sinking of the RMS Lusitania, SM U-1 (Germany), SM U-13, SM U-142, SM U-16 (Germany), SM U-17 (Germany), SM U-19 (Germany), SM U-2 (Germany), SM U-23 (Germany), SM U-27 (Germany), SM U-3 (Germany), SM U-43 (Germany), SM U-5 (Germany), SM U-51, SM U-57, SM U-63 (Germany), SM U-9, Sonar, South Korea, Soviet Union, Steel, Stephen King-Hall, Strategic bombing, Submarine, Submarine snorkel, Submarine warfare, Submarines of the Imperial Japanese Navy, Sussex pledge, T11 torpedo, Thorsten Nordenfelt, Tony Fasson, Torpedo, Treaty of Versailles, Turkey, Type 201 submarine, Type 205 submarine, Type 206 submarine, Type 209 submarine, Type 212 submarine, Type 214 submarine, Type I submarine, Type II submarine, Type IX submarine, Type VII submarine, Type X submarine, Type XIV submarine, Type XVII submarine, Type XXI submarine, Type XXIII submarine, U-boat Campaign (World War I), Uncompleted U-boat projects, United States Armed Forces, United States Navy, Unrestricted submarine warfare, Weimar Republic, Wilhelm Bauer, Wilhelm II, German Emperor, Winston Churchill, Wolfgang Petersen, Wolfpack (naval tactic), World War I, World War II, 7th Cruiser Squadron (United Kingdom). Expand index (145 more) »

Aces of the Deep

Aces of the Deep is a World War II submarine simulator game developed and published by Dynamix for MS-DOS in 1994.

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Action of 22 September 1914

The Action of 22 September 1914 was a German U-boat ambush that took place during the First World War, in which three obsolete Royal Navy cruisers, manned mainly by reservists and sometimes referred to as the livebait squadron, were sunk by a German submarine while on patrol.

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Air-independent propulsion

Air-independent propulsion (AIP) is any marine propulsion technology that allows a non-nuclear submarine to operate without access to atmospheric oxygen (by surfacing or using a snorkel).

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Alan Turing

Alan Mathison Turing (23 June 1912 – 7 June 1954) was an English computer scientist, mathematician, logician, cryptanalyst, philosopher, and theoretical biologist.

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Allies of World War I

The Allies of World War I, or Entente Powers, were the countries that opposed the Central Powers in the First World War.

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Allies of World War II

The Allies of World War II, called the United Nations from the 1 January 1942 declaration, were the countries that together opposed the Axis powers during the Second World War (1939–1945).

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Americas

The Americas (also collectively called America)"America." The Oxford Companion to the English Language.

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Anglo-German Naval Agreement

The Anglo-German Naval Agreement of 18 June 1935 was a naval agreement between the United Kingdom and Germany regulating the size of the Kriegsmarine in relation to the Royal Navy.

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Arctic

The Arctic is a polar region located at the northernmost part of Earth.

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Arms race

An arms race, in its original usage, is a competition between two or more states to have the best armed forces.

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Atlantic Ocean

The Atlantic Ocean is the second largest of the world's oceans with a total area of about.

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August Howaldt

August Ferdinand Howaldt (23 October 1809 – 4 August 1883) was a German engineer and ship builder.

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Austria-Hungary

Austria-Hungary, often referred to as the Austro-Hungarian Empire or the Dual Monarchy in English-language sources, was a constitutional union of the Austrian Empire (the Kingdoms and Lands Represented in the Imperial Council, or Cisleithania) and the Kingdom of Hungary (Lands of the Crown of Saint Stephen or Transleithania) that existed from 1867 to 1918, when it collapsed as a result of defeat in World War I. The union was a result of the Austro-Hungarian Compromise of 1867 and came into existence on 30 March 1867.

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Austro-Hungarian Navy

The Austro-Hungarian Navy (German: kaiserliche und königliche Kriegsmarine, Hungarian: Császári és Királyi Haditengerészet "Imperial and Royal War Navy") was the naval force of Austria-Hungary.

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Baltic Sea

The Baltic Sea is a sea of the Atlantic Ocean, enclosed by Scandinavia, Finland, Estonia, Latvia, Lithuania, Russia, Poland, Germany and the North and Central European Plain.

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Battle of Jutland

The Battle of Jutland (Skagerrakschlacht, the Battle of Skagerrak) was a naval battle fought by the British Royal Navy's Grand Fleet under Admiral Sir John Jellicoe, against the Imperial German Navy's High Seas Fleet under Vice-Admiral Reinhard Scheer during the First World War.

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Battle of the Atlantic

The Battle of the Atlantic was the longest continuous military campaign in World War II, running from 1939 to the defeat of Germany in 1945.

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Battleship

A battleship is a large armored warship with a main battery consisting of large caliber guns.

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Beachy Head

Beachy Head is a Chalk headland in East Sussex, England.

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Bell Island (Newfoundland and Labrador)

Bell Island is an island located off the Avalon Peninsula of Newfoundland and Labrador, Canada in Conception Bay.

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Biber (submarine)

The Biber (German for "beaver") was a German midget submarine of the Second World War.

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Blockade

A blockade is an effort to cut off supplies, war material or communications from a particular area by force, either in part or totally.

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Bold (decoy)

Bold (a term derived from kobold) was a German sonar decoy, used by U-boats during the Second World War from 1942 onwards.

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Bombe

The bombe is an electro-mechanical device used by British cryptologists to help decipher German Enigma-machine-encrypted secret messages during World War II.

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Brandtaucher

Brandtaucher (German for Fire-diver) was a submersible designed by the Bavarian inventor and engineer Wilhelm Bauer and built by Schweffel & Howaldt in Kiel for Schleswig-Holstein's Flotilla (part of the Reichsflotte) in 1850.

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British Empire

The British Empire comprised the dominions, colonies, protectorates, mandates and other territories ruled or administered by the United Kingdom and its predecessor states.

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Cargo ship

A cargo ship or freighter ship is any sort of ship or vessel that carries cargo, goods, and materials from one port to another.

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Coastal submarine

A coastal submarine or littoral submarine is a small, maneuverable submarine with shallow draft well suited to navigation of coastal channels and harbors.

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Colin Grazier

Able Seaman Colin Grazier, GC was posthumously awarded the George Cross for the "outstanding bravery and steadfast devotion to duty in the face of danger" which he displayed on 30 October 1942 in action in the eastern Mediterranean when capturing codebooks vital for the breaking of the German naval "Shark" Enigma cipher from the sinking.

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Commerce raiding

Commerce raiding is a form of naval warfare used to destroy or disrupt logistics of the enemy on the open sea by attacking its merchant shipping, rather than engaging its combatants or enforcing a blockade against them.

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Computer

A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming.

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Crash dive

A crash dive is a maneuver by a submarine in which the vessel submerges as quickly as possible to avoid attack.

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Cruiser

A cruiser is a type of warship.

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Das Boot

Das Boot (German: "The Boat") is a 1981 German war film written and directed by Wolfgang Petersen, produced by Günter Rohrbach, and starring Jürgen Prochnow, Herbert Grönemeyer, and Klaus Wennemann.

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Deck gun

A deck gun is a type of naval artillery mounted on the deck of a submarine.

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Denmark

Denmark (Danmark), officially the Kingdom of Denmark,Kongeriget Danmark,.

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Depth charge

A depth charge is an anti-submarine warfare weapon.

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Destroyer

In naval terminology, a destroyer is a fast, maneuverable long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against smaller powerful short-range attackers.

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Detonation

Detonation is a type of combustion involving a supersonic exothermic front accelerating through a medium that eventually drives a shock front propagating directly in front of it.

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Deutsches Museum

The Deutsches Museum (German Museum) in Munich, Germany, is the world's largest museum of science and technology, with about 28,000 exhibited objects from 50 fields of science and technology.

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Diesel engine

The diesel engine (also known as a compression-ignition or CI engine), named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel which is injected into the combustion chamber is caused by the elevated temperature of the air in the cylinder due to mechanical compression (adiabatic compression).

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Diplomacy

Diplomacy is the art and practice of conducting negotiations between representatives of states.

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Dredging

Dredging is an excavation activity usually carried out underwater, in harbours, shallow seas or freshwater areas with the purpose of gathering up bottom sediments to deepen or widen the sea bottom / channel.

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Engineer

Engineers, as practitioners of engineering, are people who invent, design, analyze, build, and test machines, systems, structures and materials to fulfill objectives and requirements while considering the limitations imposed by practicality, regulation, safety, and cost.

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Enigma machine

The Enigma machines were a series of electro-mechanical rotor cipher machines developed and used in the early- to mid-20th century to protect commercial, diplomatic and military communication.

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Escort carrier

The escort carrier or escort aircraft carrier (US hull classification symbol CVE), also called a "jeep carrier" or "baby flattop" in the United States Navy (USN) or "Woolworth Carrier" by the Royal Navy, was a small and slow type of aircraft carrier used by the Royal Navy, the Imperial Japanese Navy and Imperial Japanese Army Air Force, and the United States Navy in World War II.

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Fanfare (decoy)

The T-Mk 6 Fanfare is a towed sonar decoy developed after the Second World War by the United States Navy.

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Ferromagnetism

Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets.

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First Happy Time

The early phase of the Battle of the Atlantic during which German Navy U-boats enjoyed significant success against the British Royal Navy and its allies was referred to by U-boat crews as "the Happy Time" ("Die Glückliche Zeit"), and later the First Happy Time, after a second successful period was encountered.

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Foxer

Foxer was the code name for a British built acoustic decoy used to confuse German acoustic homing torpedoes like the G7 torpedo during the Second World War.

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Friedrich Krupp Germaniawerft

Friedrich Krupp Germaniawerft (often just called Germaniawerft, "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 the Kaiserliche Marine in World War I and the Kriegsmarine in World War II.

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Fuel cell

A fuel cell is an electrochemical cell that converts the chemical energy from a fuel into electricity through an electrochemical reaction of hydrogen fuel with oxygen or another oxidizing agent.

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G7e torpedo

The G7e or more appropriately the G7e/T2, G7e/T3, and G7e/T4 Falke torpedoes were, with the exception of the T4 model, the standard torpedoes for Germany during World War II.

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G7es torpedo

The G7es (T5) "Zaunkönig" ("wren") was an acoustic torpedo employed by German U-boats during World War II.

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Gal-class submarine

The Type 540 Gal-class submarine is a slightly modified variant of the German HDW Type 206 submarine class (which includes the distinctive dome, or bulge, in the front of the boat), modified for Israeli requirements.

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Gallipoli Campaign

The Gallipoli Campaign, also known as the Dardanelles Campaign, the Battle of Gallipoli, or the Battle of Çanakkale (Çanakkale Savaşı), was a campaign of the First World War that took place on the Gallipoli peninsula (Gelibolu in modern Turkey) in the Ottoman Empire between 17 February 1915 and 9 January 1916.

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German Navy

The German Navy (Deutsche Marine or simply Marine—) is the navy of Germany and part of the unified Bundeswehr ("Federal Defense"), the German Armed Forces.

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German submarine U-103

U-103 may refer to one of the following German submarines.

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German Type Mittel U submarine

Mittel U was a class of U-boats built during World War I by the Kaiserliche Marine.

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German Type U 139 submarine

U-139, originally designated "Project 46", was a class of large, long-range U-boats built during World War I by the Kaiserliche Marine.

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German Type U 151 submarine

Type U 151 U-boats were a class of large, long-range submarines initially constructed during World War I to be merchant submarines and later used by the Kaiserliche Marine (Imperial German Navy).

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German Type U 31 submarine

U 31 was a class of U-boats built during World War I by the Kaiserliche Marine.

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German Type U 66 submarine

The Type U 66 was a class of five submarines or U-boats operated by the German Imperial Navy (Kaiserliche Marine) during World War I. The class is alternately referred to as the U-66-class or the Type UD.

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German Type UB I submarine

The Type UB I was a class of small coastal submarines (U-boats) built in Germany at the beginning of the First World War.

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German Type UB II submarine

The UB II type submarine was a class of U-boat built during World War I by the German Imperial Navy.

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German Type UB III submarine

The Type UB III submarine was a class of U-boat built during World War I by the German Imperial Navy.

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German Type UC I submarine

The Type UC I coastal submarines were a class of small minelaying U-boats built in Germany during the early part of World War I. They were the first operational minelaying submarines in the world (although the Russian submarine ''Krab'' was laid down earlier).

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German Type UC II submarine

Type UC II minelaying submarines were used by the Imperial German Navy during World War I. They displaced 417 tons, carried guns, 7 torpedoes and up to 18 mines.

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German Type UC III submarine

Type UC III minelaying submarines were used by the Imperial German Navy (Kaiserliche Marine) during World War I. They displaced at the surface and submerged, carried guns, 7 torpedoes and up to 14 mines.

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German Type UE I submarine

The German Type UE I submarine was an ocean-going single-hull submarine with saddle tanks built by AG Vulkan in Hamburg and Kaiserliche Werft Danzig.

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German Type UE II submarine

The Type UE II submarines were a class of submarines built by the German Empire during World War I as long-range mine-layers.

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Grand Fleet

The Grand Fleet was the main fleet of the British Royal Navy during the First World War.

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Greece

No description.

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Gulf of Mexico

The Gulf of Mexico (Golfo de México) is an ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent.

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Hai (midget submarine)

The Hai (shark) was an advanced model of the ''Marder''-class midget submarines created in Nazi Germany during World War II and operated by the K-Verband.

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Harwich

Harwich is a town in Essex, England and one of the Haven ports, located on the coast with the North Sea to the east.

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Hedgehog (weapon)

The Hedgehog (also known as an Anti-Submarine Projector) was a forward-throwing anti-submarine weapon that was used during the Battle of the Atlantic in the Second World War.

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Herbert Werner

Herbert A. Werner (13 May 1920 – 6 April 2013) was a German submarine officer and captain during World War II.

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High Seas Fleet

The High Seas Fleet (Hochseeflotte) was the battle fleet of the German Imperial Navy and saw action during the First World War.

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High-frequency direction finding

High-frequency direction finding, usually known by its abbreviation HF/DF or nickname huff-duff, is a type of radio direction finder (RDF) introduced in World War II.

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Hydrogen

Hydrogen is a chemical element with symbol H and atomic number 1.

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Hydrogen peroxide

Hydrogen peroxide is a chemical compound with the formula.

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Imperial German Navy

The Imperial German Navy ("Imperial Navy") was the navy created at the time of the formation of the German Empire.

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Inventor

An inventor is a person who creates or discovers a new method, form, device or other useful means that becomes known as an invention.

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Israeli Navy

The Israeli Navy (חיל הים הישראלי, Ḥeil HaYam HaYisraeli (English: Sea Corps of Israel); البحرية الإسرائيلية) is the naval warfare service arm of the Israel Defense Forces, operating primarily in the Mediterranean Sea theater as well as the Gulf of Aqaba and the Red Sea theater.

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Karl Dönitz

Grand Admiral Karl Dönitz (sometimes spelled Doenitz;; 16 September 1891 24 December 1980) was a German admiral who played a major role in the naval history of World War II.

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Karp-class submarine

The Karp class were a class of submarines built by Krupp Germaniawerft for the Imperial Russian Navy.

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Körting Hannover

Körting Hannover AG (previously Körting Brothers AG) is a long-standing industrial engineering company in Hanover.

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Kerosene

Kerosene, also known as paraffin, lamp oil, and coal oil (an obsolete term), is a combustible hydrocarbon liquid which is derived from petroleum.

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Kiel

Kiel is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 249,023 (2016).

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Kobold

The kobold (occasionally cobold) is a sprite stemming from Germanic mythology and surviving into modern times in German folklore.

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Kriegsmarine

The Kriegsmarine (literally "War Navy") was the navy of Germany from 1935 to 1945.

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Krupp

The Krupp family (see pronunciation), a prominent 400-year-old German dynasty from Essen, became famous for their production of steel, artillery, ammunition, and other armaments.

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Leigh Light

The Leigh Light (abbreviated L/L) was a British World War II era anti-submarine device used in the Battle of the Atlantic.

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List of Knight's Cross of the Iron Cross recipients of the U-boat service

The Knight's Cross of the Iron Cross (German: Ritterkreuz des Eisernen Kreuzes) and its variants was the highest award in the military of the Third Reich.

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List of most successful German U-boats

List of successful U-boats contains lists of the most successful German U-boats in the two World Wars based on total tonnage.

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List of most successful U-boat commanders

The list of most successful U-boat commanders contains the top-scoring German U-boat commanders in the two World Wars based on their total tonnage sunk.

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List of U-boats never deployed

During the Second World War, the German Navy built over a thousand U-boats or submarines for service in the Battle of the Atlantic and elsewhere.

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List of U-boats of Germany

Germany has commissioned over 1,500 U-boats (Unterseeboot) into its various navies from 1906 to the present day.

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Loch Ryan

Loch Ryan (Gaelic: Loch Rìoghaine, pronounced) 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.

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Londonderry Port

Londonderry Port, now operating as Foyle Port, is a port on Lough Foyle in Northern Ireland.

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Magnetic anomaly detector

A magnetic anomaly detector (MAD) is an instrument used to detect minute variations in the Earth's magnetic field.

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Magnetic pistol

Magnetic pistol is the term for the device on a torpedo or naval mine that detects its target by its magnetic field, and triggers the fuse for detonation.

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Möltenort U-Boat Memorial

The U-Boot-Ehrenmal Möltenort (Möltenort U-Boat Memorial) in Heikendorf near Kiel is a memorial site belonging to the German War Graves Commission, commemorating the soldiers who died serving in U-Boat units during the First and Second World Wars, along with all victims of submarine warfare.

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Midget submarine

A midget submarine (also called a mini submarine) is any submarine under 150 tons, typically operated by a crew of one or two but sometimes up to 6 or 9, with little or no on-board living accommodation.

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Molch

The Molch (German language: "newt" or "salamander") was an unsuccessful series of one-man midget submarines created during World War II.

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Monsun Gruppe

The Gruppe Monsun or Monsoon Group was a force of German U-boats (submarines) that operated in the Pacific and Indian Oceans during World War II.

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Museum of Science and Industry (Chicago)

The Museum of Science and Industry (MSI) is located in Chicago, Illinois, in Jackson Park, in the Hyde Park neighborhood between Lake Michigan and The University of Chicago.

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Museum ship

A museum ship, also called a memorial ship, is a ship that has been preserved and converted into a museum open to the public for educational or memorial purposes.

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Naval mine

A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines.

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Newfoundland and Labrador

Newfoundland and Labrador (Terre-Neuve-et-Labrador; Akamassiss; Newfoundland Irish: Talamh an Éisc agus Labradar) is the most easterly province of Canada.

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Nuclear submarine

A nuclear submarine is a submarine powered by a nuclear reactor.

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Operation Weserübung

Operation Weserübung was the code name for Germany's assault on Denmark and Norway during the Second World War and the opening operation of the Norwegian Campaign.

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Ore

An ore is an occurrence of rock or sediment that contains sufficient minerals with economically important elements, typically metals, that can be economically extracted from the deposit.

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Orkney Wireless Museum

The Orkney Wireless Museum in Kirkwall, Orkney, Scotland, houses a collection of domestic and military wireless equipment.

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Paris Peace Conference, 1919

The Paris Peace Conference, also known as Versailles Peace Conference, was the meeting of the victorious Allied Powers following the end of World War I to set the peace terms for the defeated Central Powers.

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Penang

Penang is a Malaysian state located on the northwest coast of Peninsular Malaysia, by the Malacca Strait.

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Periscope

A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position.

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Pre-dreadnought battleship

Pre-dreadnought battleships were sea-going battleships built between the mid- to late 1880s and 1905, before the launch of.

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Prize (law)

Prize is a term used in admiralty law to refer to equipment, vehicles, vessels, and cargo captured during armed conflict.

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Q-ship

Q-ships, also known as Q-boats, decoy vessels, special service ships, or mystery ships, were heavily armed merchant ships with concealed weaponry, designed to lure submarines into making surface attacks.

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Radar

Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects.

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Reinhard Scheer

Reinhard Scheer (30 September 1863 – 26 November 1928) was an Admiral in the Imperial German Navy (Kaiserliche Marine).

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RMS Olympic

RMS Olympic was a British transatlantic ocean liner, the lead ship of the White Star Line's trio of liners.

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Royal Navy

The Royal Navy (RN) is the United Kingdom's naval warfare force.

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Russia

Russia (rɐˈsʲijə), officially the Russian Federation (p), is a country in Eurasia. At, Russia is the largest country in the world by area, covering more than one-eighth of the Earth's inhabited land area, and the ninth most populous, with over 144 million people as of December 2017, excluding Crimea. About 77% of the population live in the western, European part of the country. Russia's capital Moscow is one of the largest cities in the world; other major cities include Saint Petersburg, Novosibirsk, Yekaterinburg and Nizhny Novgorod. Extending across the entirety of Northern Asia and much of Eastern Europe, Russia spans eleven time zones and incorporates a wide range of environments and landforms. From northwest to southeast, Russia shares land borders with Norway, Finland, Estonia, Latvia, Lithuania and Poland (both with Kaliningrad Oblast), Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, China, Mongolia and North Korea. It shares maritime borders with Japan by the Sea of Okhotsk and the U.S. state of Alaska across the Bering Strait. The East Slavs emerged as a recognizable group in Europe between the 3rd and 8th centuries AD. Founded and ruled by a Varangian warrior elite and their descendants, the medieval state of Rus arose in the 9th century. In 988 it adopted Orthodox Christianity from the Byzantine Empire, beginning the synthesis of Byzantine and Slavic cultures that defined Russian culture for the next millennium. Rus' ultimately disintegrated into a number of smaller states; most of the Rus' lands were overrun by the Mongol invasion and became tributaries of the nomadic Golden Horde in the 13th century. The Grand Duchy of Moscow gradually reunified the surrounding Russian principalities, achieved independence from the Golden Horde. By the 18th century, the nation had greatly expanded through conquest, annexation, and exploration to become the Russian Empire, which was the third largest empire in history, stretching from Poland on the west to Alaska on the east. Following the Russian Revolution, the Russian Soviet Federative Socialist Republic became the largest and leading constituent of the Union of Soviet Socialist Republics, the world's first constitutionally socialist state. The Soviet Union played a decisive role in the Allied victory in World War II, and emerged as a recognized superpower and rival to the United States during the Cold War. The Soviet era saw some of the most significant technological achievements of the 20th century, including the world's first human-made satellite and the launching of the first humans in space. By the end of 1990, the Soviet Union had the world's second largest economy, largest standing military in the world and the largest stockpile of weapons of mass destruction. Following the dissolution of the Soviet Union in 1991, twelve independent republics emerged from the USSR: Russia, Ukraine, Belarus, Kazakhstan, Uzbekistan, Armenia, Azerbaijan, Georgia, Kyrgyzstan, Moldova, Tajikistan, Turkmenistan and the Baltic states regained independence: Estonia, Latvia, Lithuania; the Russian SFSR reconstituted itself as the Russian Federation and is recognized as the continuing legal personality and a successor of the Soviet Union. It is governed as a federal semi-presidential republic. The Russian economy ranks as the twelfth largest by nominal GDP and sixth largest by purchasing power parity in 2015. Russia's extensive mineral and energy resources are the largest such reserves in the world, making it one of the leading producers of oil and natural gas globally. The country is one of the five recognized nuclear weapons states and possesses the largest stockpile of weapons of mass destruction. Russia is a great power as well as a regional power and has been characterised as a potential superpower. It is a permanent member of the United Nations Security Council and an active global partner of ASEAN, as well as a member of the G20, the Shanghai Cooperation Organisation (SCO), the Council of Europe, the Asia-Pacific Economic Cooperation (APEC), the Organization for Security and Co-operation in Europe (OSCE), and the World Trade Organization (WTO), as well as being the leading member of the Commonwealth of Independent States (CIS), the Collective Security Treaty Organization (CSTO) and one of the five members of the Eurasian Economic Union (EEU), along with Armenia, Belarus, Kazakhstan and Kyrgyzstan.

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Russian submarine Forel

Forel (Форель, Forelle - Trout) was a midget submarine designed by Raimondo Lorenzo D’Equevilley-Montjustin and built by Krupp in Kiel, Germany.

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Russo-Japanese War

The Russo–Japanese War (Russko-yaponskaya voina; Nichirosensō; 1904–05) was fought between the Russian Empire and the Empire of Japan over rival imperial ambitions in Manchuria and Korea.

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Seehund

The Seehund (German: "seal"), also known as Type XXVII, was a successful series of German midget submarines created during World War II.

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Shock wave

In physics, a shock wave (also spelled shockwave), or shock, is a type of propagating disturbance.

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Sieglinde (decoy)

Sieglinde was a sonar decoy used during the Second World War by German U-boats.

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Silent Hunter III

Silent Hunter III is a submarine simulation developed by Ubisoft Bucharest and published by Ubisoft.

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Sinking of the RMS Lusitania

The sinking of the Cunard ocean liner RMS ''Lusitania'' occurred on Friday, 7 May 1915 during the First World War, as Germany waged submarine warfare against the United Kingdom which had implemented a naval blockade of Germany.

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SM U-1 (Germany)

SM U-1, also known in English as the German Type U 1 submarine, was the first U-boat class of the U-boat series of submarines produced for the German Empire's Imperial German Navy.

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SM U-13

SM U-13 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-13 was engaged in the naval warfare and took part in the First Battle of the Atlantic.

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SM U-142

SM U-142 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-142 was not engaged in the naval warfare.

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SM U-16 (Germany)

SM U-16 was one of the 329 submarines serving in the Imperial German Navy in World War I.

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SM U-17 (Germany)

SM U-17 was a German submarine during World War I. U-17 sank the first British merchant vessel in the First World War, and also sank another nine ships and captured one ship, surviving the war without casualty.

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SM U-19 (Germany)

SM U-19 was a German Type U 19 U-boat built for the Imperial German Navy.

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SM U-2 (Germany)

SM U-2 was a German U-boat built for the Imperial German Navy.

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SM U-23 (Germany)

SM U-23 was one of the 329 U-boats serving in the Imperial German Navy in World War I. U-23 was engaged in the naval warfare and took part in the First Battle of the Atlantic.

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SM U-27 (Germany)

SM U-27 was a German Type ''U-27'' U-boat built for service in the Imperial German Navy.

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SM U-3 (Germany)

SM U-3 was the third German U-boat created by the German Empire in their history, and the first of two submarines in its class.

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SM U-43 (Germany)

SM U-43 was one of 329 submarines serving in the Imperial German Navy in World War I. She engaged in commerce warfare in the First Battle of the Atlantic, performing 11 patrols from 1915-1918.

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SM U-5 (Germany)

SM U-5 was a German Type U 5 U-boat built for the Imperial German Navy.

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SM U-51

SM U-51 was a Type U 51 submarine, one of 329 submarines in the Imperial German Navy in World War I. She engaged in commerce warfare during the First Battle of the Atlantic.

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SM U-57

SM U-57 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-57 was engaged in naval warfare and took part in the First Battle of the Atlantic.

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SM U-63 (Germany)

SM U-63 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-63 was engaged in naval warfare and took part in the First Battle of the Atlantic.

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SM U-9

SM U-9 was a German Type U 9 U-boat.

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Sonar

Sonar (originally an acronym for SOund Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.

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South Korea

South Korea, officially the Republic of Korea (대한민국; Hanja: 大韓民國; Daehan Minguk,; lit. "The Great Country of the Han People"), is a country in East Asia, constituting the southern part of the Korean Peninsula and lying east to the Asian mainland.

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Soviet Union

The Soviet Union, officially the Union of Soviet Socialist Republics (USSR) was a socialist state in Eurasia that existed from 1922 to 1991.

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Steel

Steel is an alloy of iron and carbon and other elements.

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Stephen King-Hall

William Stephen Richard King-Hall, Baron King-Hall (21 January 1893 – 2 June 1966) was a British naval officer, writer, politician and playwright.

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Strategic bombing

Strategic bombing is a military strategy used in a total war with the goal of defeating the enemy by destroying its morale or its economic ability to produce and transport materiel to the theatres of military operations, or both.

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Submarine

A submarine (or simply sub) is a watercraft capable of independent operation underwater.

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Submarine snorkel

A submarine snorkel is a device which allows a submarine to operate submerged while still taking in air from above the surface.

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Submarine warfare

Submarine warfare is one of the four divisions of underwater warfare, the others being anti-submarine warfare, mine warfare and mine countermeasures.

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Submarines of the Imperial Japanese Navy

Imperial Japanese Navy submarines originated with the purchase of five Holland type submarines from the United States in 1904.

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Sussex pledge

The Sussex Pledge was a promise made by Germany to the United States in 1916, during World War I before the latter entered the war.

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T11 torpedo

The G7es (TXI) "Zaunkönig II" was a torpedo developed for German U-boats during World War II.

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Thorsten Nordenfelt

Thorsten Nordenfelt (1 May 1842 – 18 August 1920), was a Swedish inventor and industrialist.

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Tony Fasson

Lieutenant Francis Anthony Blair Fasson, (17 July 1913 – 30 October 1942), known as Tony Fasson, was a British Royal Navy officer.

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Torpedo

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

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Treaty of Versailles

The Treaty of Versailles (Traité de Versailles) was the most important of the peace treaties that brought World War I to an end.

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Turkey

Turkey (Türkiye), officially the Republic of Turkey (Türkiye Cumhuriyeti), is a transcontinental country in Eurasia, mainly in Anatolia in Western Asia, with a smaller portion on the Balkan peninsula in Southeast Europe.

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Type 201 submarine

The Type 201 was Germany's first class of military submarines built after World War II.

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Type 205 submarine

The Type 205 was a class of German diesel-electric submarines.

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Type 206 submarine

The Type 206 is a class of diesel-electric submarines (Uboats) developed by Howaldtswerke-Deutsche Werft (HDW).

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Type 209 submarine

The Type 209 is a class of diesel-electric attack submarine developed exclusively for export by Howaldtswerke-Deutsche Werft of Germany.

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Type 212 submarine

The German Type 212 class, also Italian Todaro class, is a highly advanced design of non-nuclear submarine developed by Howaldtswerke-Deutsche Werft AG (HDW) for the German and Italian navies.

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Type 214 submarine

The Type 214 is a diesel-electric submarine developed by Howaldtswerke-Deutsche Werft GmbH (HDW).

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Type I submarine

The Type I U-boat was the first post–World War I attempt by Nazi Germany's Hocheseeflotte to produce an oceangoing submarine.

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Type II submarine

The Type II U-boat was designed by Nazi Germany as a coastal U-boat, modeled after the CV-707 submarine, which was designed by the Dutch dummy company NV Ingenieurskantoor voor Scheepsbouw den Haag (I.v.S) (set up by Germany after World War I in order to maintain and develop German submarine technology and to circumvent the limitations set by the Treaty of Versailles) and built in 1933 by the Finnish Crichton-Vulcan shipyard in Turku, Finland.

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Type IX submarine

The Type IX U-boat was designed by Nazi Germany's Kriegsmarine in 1935 and 1936 as a large ocean-going submarine for sustained operations far from the home support facilities.

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Type VII submarine

Type VII U-boats were the most common type of German World War II U-boat.

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Type X submarine

Type X (XB) U-boats were a special type of German submarine (U-boat).

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Type XIV submarine

The Type XIV U-boat was a modification of the Type IXD, designed to resupply other U-boats, being the only Submarine tenders built which were not surface ships.

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Type XVII submarine

The Type XVII U-boats were small coastal submarines that used Hellmuth Walter's high-test peroxide propulsion system, which offered a combination of air-independent propulsion and high submerged speeds.

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Type XXI submarine

Type XXI U-boats were a class of German diesel-electric Elektroboot (German: "electric boat") submarines designed during the Second World War.

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Type XXIII submarine

German Type XXIII submarines were the first so-called elektroboats to become operational.

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U-boat Campaign (World War I)

The U-boat Campaign from 1914 to 1918 was the World War I naval campaign fought by German U-boats against the trade routes of the Allies.

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Uncompleted U-boat projects

During World War II, Nazi Germany's Kriegsmarine considered various submarine designs for specialized operations or improving U-boat performance.

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United States Armed Forces

The United States Armed Forces are the military forces of the United States of America.

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United States Navy

The United States Navy (USN) is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States.

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Unrestricted submarine warfare

Unrestricted submarine warfare is a type of naval warfare in which submarines sink vessels such as freighters and tankers without warning, as opposed to attacks per prize rules (also known as "cruiser rules").

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Weimar Republic

The Weimar Republic (Weimarer Republik) is an unofficial, historical designation for the German state during the years 1919 to 1933.

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Wilhelm Bauer

Wilhelm Bauer (23 December 1822 – 20 June 1875) was a Bavarian inventor and engineer who built several hand-powered submarines.

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Wilhelm II, German Emperor

Wilhelm II (Friedrich Wilhelm Viktor Albert von Hohenzollern; 27 January 18594 June 1941) was the last German Emperor (Kaiser) and King of Prussia, ruling the German Empire and the Kingdom of Prussia from 15 June 1888 to 9 November 1918.

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Winston Churchill

Sir Winston Leonard Spencer-Churchill (30 November 187424 January 1965) was a British politician, army officer, and writer, who was Prime Minister of the United Kingdom from 1940 to 1945 and again from 1951 to 1955.

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Wolfgang Petersen

Wolfgang Petersen (born 14 March 1941) is a German film director and screenwriter.

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Wolfpack (naval tactic)

The term wolfpack refers to the mass-attack tactics against convoys used by German U-boats of the Kriegsmarine during the Battle of the Atlantic, and by submarines of the United States Navy against Japanese shipping in the Pacific Ocean in World War II.

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World War I

World War I (often abbreviated as WWI or WW1), also known as the First World War, the Great War, or the War to End All Wars, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918.

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World War II

World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier.

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7th Cruiser Squadron (United Kingdom)

The 7th Cruiser Squadron (also known as Cruiser Force C) was a blockading force of the Royal Navy during the First World War used to close the English Channel to German traffic.

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Redirects here:

Eiserne Särge, German U-boat, German U-boats, German submarine, German submarines, U Boat, U boat, U boats, U boot, U-Boat, U-Boats, U-Boot, U-boats, Uboat, Unterseeboot.

References

[1] https://en.wikipedia.org/wiki/U-boat

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