Table of Contents
231 relations: Aces of the Deep, Action of 22 September 1914, Afrika Korps, Aftenposten, Air-independent propulsion, Alan Turing, Alfred von Tirpitz, Anglo-German Naval Agreement, Anti-submarine weapon, Arabian Sea, Arctic, Argentina, Armored cruiser, Arms race, Atlantic Ocean, August Howaldt, Austro-Hungarian Navy, Ballast tank, Baltic Sea, Battle of the Atlantic, Battleship, Befehlshaber der U-Boote, Biber (submarine), Black May (1943), Blockade, Bold (decoy), Bombe, Brandtaucher, Caribbean Sea, Chief petty officer, Coastal submarine, Commerce raiding, Computer, Conning tower, Convoy battles of World War II, Convoys in World War I, Cruiser, Das Boot, Deck gun, Decoy, Denmark, Depth charge, Destroyer, Deutsches Museum, Diplomacy, Diving plane, Dolphin-class submarine, Dredging, Electric motor, Engineer, ... Expand index (181 more) »
- Germany in World War II
- Submarines by type
- Submarines of the Imperial German Navy
- Submarines of the Kriegsmarine
- U-boats
- World War I submarines
- World War II submarines
Aces of the Deep
Aces of the Deep is a World War II submarine simulator game developed by Dynamix for MS-DOS in 1994.
See U-boat and Aces of the Deep
Action of 22 September 1914
The Action of 22 September 1914 was an attack by the German U-boat that took place during the First World War.
See U-boat and Action of 22 September 1914
Afrika Korps
The German Africa Corps (DAK), commonly known as Afrika Korps, was the German expeditionary force in Africa during the North African campaign of World War II.
Aftenposten
Aftenposten (stylized as i in the masthead) is Norway's largest printed newspaper by circulation.
Air-independent propulsion
Air-independent propulsion (AIP), or air-independent power, is any marine propulsion technology that allows a non-nuclear submarine to operate without access to atmospheric oxygen (by surfacing or using a snorkel).
See U-boat and Air-independent propulsion
Alan Turing
Alan Mathison Turing (23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist.
Alfred von Tirpitz
Alfred Peter Friedrich von Tirpitz (19 March 1849 – 6 March 1930) was a German grand admiral, State Secretary of the German Imperial Naval Office, the powerful administrative branch of the German Imperial Navy from 1897 until 1916.
See U-boat and Alfred von Tirpitz
Anglo-German Naval Agreement
The Anglo-German Naval Agreement (AGNA) 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.
See U-boat and Anglo-German Naval Agreement
Anti-submarine weapon
An anti-submarine weapon (ASW) is any one of a number of devices that are intended to act against a submarine and its crew, to destroy (sink) the vessel or reduce its capability as a weapon of war.
See U-boat and Anti-submarine weapon
Arabian Sea
The Arabian Sea (हिन्दी|Hindī: सिंधु सागर, baḥr al-ʿarab) is a region of sea in the northern Indian Ocean, bounded on the west by the Arabian Peninsula, Gulf of Aden and Guardafui Channel, on the northwest by Gulf of Oman and Iran, on the north by Pakistan, on the east by India, and on the southeast by the Laccadive Sea and the Maldives, on the southwest by Somalia.
Arctic
The Arctic is a polar region located at the northernmost part of Earth.
Argentina
Argentina, officially the Argentine Republic, is a country in the southern half of South America.
Armored cruiser
The armored cruiser was a type of warship of the late 19th and early 20th centuries.
See U-boat and Armored cruiser
Arms race
An arms race occurs when two or more groups compete in military superiority.
Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's five oceanic divisions, with an area of about.
August Howaldt
August Ferdinand Howaldt (23 October 1809 – 4 August 1883) was a German engineer and ship builder.
Austro-Hungarian Navy
The Austro-Hungarian Navy or Imperial and Royal War Navy (kaiserliche und königliche Kriegsmarine, in short k.u.k. Kriegsmarine, Császári és Királyi Haditengerészet) was the naval force of Austria-Hungary.
See U-boat and Austro-Hungarian Navy
Ballast tank
A ballast tank is a compartment within a boat, ship or other floating structure that holds water, which is used as ballast to provide hydrostatic stability for a vessel, to reduce or control buoyancy, as in a submarine, to correct trim or list, to provide a more even load distribution along the hull to reduce structural hogging or sagging stresses, or to increase draft, as in a semi-submersible vessel or platform, or a SWATH, to improve seakeeping.
Baltic Sea
The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North and Central European Plain.
Battle of the Atlantic
The Battle of the Atlantic, the longest continuous military campaign in World War II, ran from 1939 to the defeat of Nazi Germany in 1945, covering a major part of the naval history of World War II.
See U-boat and Battle of the Atlantic
Battleship
A battleship is a large, heavily armored warship with a main battery consisting of large-caliber guns, designed to serve as capital ships with the most intense firepower.
Befehlshaber der U-Boote
The Befehlshaber der Unterseeboote or BdU (Eng: "Commander of the U-boats") was the supreme commander of the German Navy's U-boat Arm (Ubootwaffe) during the First and Second World Wars. U-boat and Befehlshaber der U-Boote are submarines of the Kriegsmarine and u-boats.
See U-boat and Befehlshaber der U-Boote
Biber (submarine)
Biber (German for "beaver") was a German midget submarine of the Second World War.
See U-boat and Biber (submarine)
Black May (1943)
Black May refers to a period (May 1943) in the Battle of the Atlantic campaign during World War II, when the German U-boat arm (U-Bootwaffe) suffered high casualties with fewer Allied ships sunk; it is considered a turning point in the Battle of the Atlantic.
See U-boat and Black May (1943)
Blockade
A blockade is the act of actively preventing a country or region from receiving or sending out food, supplies, weapons, or communications, and sometimes people, by military force.
Bold (decoy)
Bold (also called Bolde, a term derived from kobold) was a German sonar decoy, used by U-boats during the Second World War from 1942 onwards. U-boat and Bold (decoy) are u-boats.
Bombe
The bombe was an electro-mechanical device used by British cryptologists to help decipher German Enigma-machine-encrypted secret messages during World War II.
See U-boat and Bombe
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. U-boat and Brandtaucher are submarines of Germany.
Caribbean Sea
The Caribbean Sea is a sea of the Atlantic Ocean in the tropics of the Western Hemisphere.
Chief petty officer
A chief petty officer (CPO) is a senior non-commissioned officer in many navies and coast guards, usually above petty officer.
See U-boat and Chief petty officer
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. U-boat and coastal submarine are submarines by type.
See U-boat and Coastal submarine
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.
See U-boat and Commerce raiding
Computer
A computer is a machine that can be programmed to automatically carry out sequences of arithmetic or logical operations (computation).
Conning tower
A conning tower is a raised platform on a ship or submarine, often armoured, from which an officer in charge can conn (conduct or control) the vessel, controlling movements of the ship by giving orders to those responsible for the ship's engine, rudder, lines, and ground tackle.
Convoy battles of World War II
Convoy Battles of World War II occurred when convoys of warships protected cargo ships assembled for mutual defense and were attacked by submarines, surface ships and/or aircraft.
See U-boat and Convoy battles of World War II
Convoys in World War I
The convoy—a group of merchantmen or troopships traveling together with a naval escort—was revived during World War I (1914–18), after having been discarded at the start of the Age of Steam.
See U-boat and Convoys in World War I
Cruiser
A cruiser is a type of warship.
Das Boot
Das Boot (The Boat) is a 1981 West German war film written and directed by Wolfgang Petersen, produced by Günter Rohrbach, and starring Jürgen Prochnow, Herbert Grönemeyer and Klaus Wennemann.
Deck gun
A deck gun is a type of naval artillery mounted on the deck of a submarine.
Decoy
A decoy (derived from the Dutch de kooi, literally "the cage" or possibly ende kooi, "duck cage") is usually a person, device, or event which resembles what an individual or a group might be looking for, but it is only meant to lure them.
See U-boat and Decoy
Denmark
Denmark (Danmark) is a Nordic country in the south-central portion of Northern Europe.
Depth charge
A depth charge is an anti-submarine warfare (ASW) weapon designed to destroy submarines by detonating in the water near the target and subjecting it to a destructive hydraulic shock.
Destroyer
In naval terminology, a destroyer is a fast, maneuverable, long-endurance warship intended to escort larger vessels in a fleet, convoy, or carrier battle group and defend them against a wide range of general threats.
Deutsches Museum
The Deutsches Museum (German Museum, officially Deutsches Museum von Meisterwerken der Naturwissenschaft und Technik (English: German Museum of Masterpieces of Science and Technology)) in Munich, Germany, is the world's largest museum of science and technology, with about 125,000 exhibited objects from 50 fields of science and technology.
See U-boat and Deutsches Museum
Diplomacy
Diplomacy comprises spoken or written communication by representatives of state, intergovernmental, or non-governmental institutions intended to influence events in the international system.
Diving plane
Diving planes, also known as hydroplanes, are control surfaces found on a submarine which allow the vessel to pitch its bow and stern up or down to assist in the process of submerging or surfacing the boat, as well as controlling depth when submerged.
Dolphin-class submarine
The Dolphin class (הצוללות מסדרת דולפין) is a diesel-electric submarine developed in Israel and constructed by Howaldtswerke-Deutsche Werft (HDW) in Kiel, Germany, for the Israeli Navy's Shayetet 7 flotilla. U-boat and Dolphin-class submarine are submarines of Germany.
See U-boat and Dolphin-class submarine
Dredging
Dredging is the excavation of material from a water environment.
Electric motor
An electric motor is an electrical machine that converts electrical energy into mechanical energy.
Engineer
Engineers, as practitioners of engineering, are professionals who invent, design, analyze, build and test machines, complex systems, structures, gadgets and materials to fulfill functional objectives and requirements while considering the limitations imposed by practicality, regulation, safety and cost.
Enigma machine
The Enigma machine is a cipher device developed and used in the early- to mid-20th century to protect commercial, diplomatic, and military communication.
Erich Raeder
Erich Johann Albert Raeder (24 April 1876 – 6 November 1960) was a German admiral who played a major role in the naval history of World War II, and was convicted of war crimes after the war.
Erwin Rommel
Johannes Erwin Eugen Rommel (15 November 1891 – 14 October 1944) was a German Generalfeldmarschall (field marshal) during World War II.
Escort carrier
The escort carrier or escort aircraft carrier (U.S. 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 slower type of aircraft carrier used by the Royal Navy, the Royal Canadian Navy, the United States Navy, the Imperial Japanese Navy and Imperial Japanese Army Air Force in World War II.
Fanfare (decoy)
The T-Mk 6 Fanfare is a towed sonar decoy developed after the Second World War by the United States Navy.
See U-boat and Fanfare (decoy)
Ferromagnetism
Ferromagnetism is a property of certain materials (such as iron) that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet.
Finnish submarine Saukko
Saukko (Pu110) was a small submarine that served in the Finnish Navy during the Second World War.
See U-boat and Finnish submarine Saukko
Finnish submarine Vesikko
Vesikko is a submarine, which was launched on 10 May 1933 at the Crichton-Vulcan dock in Turku. U-boat and Finnish submarine Vesikko are submarines of Germany.
See U-boat and Finnish submarine Vesikko
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.
See U-boat and First Happy Time
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.
See U-boat and Foxer
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.
See U-boat and Friedrich Krupp Germaniawerft
Fuel cell
A fuel cell is an electrochemical cell that converts the chemical energy of a fuel (often hydrogen) and an oxidizing agent (often oxygen) into electricity through a pair of redox reactions.
G7a torpedo
The G7a(TI) was the standard issue Kriegsmarine torpedo introduced to service in 1934.
G7e torpedo
The G7e torpedo was the standard electric torpedo used by the German Kriegsmarine submarines in World War II.
G7es torpedo
The G7es (T5) "Zaunkönig" ("wren") was a passive acoustic torpedo employed by German U-boats during World War II.
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. U-boat and Gal-class submarine are submarines of Germany.
See U-boat and Gal-class submarine
Gasoline
Gasoline or petrol is a petrochemical product characterized as a transparent, yellowish, and flammable liquid normally used as a fuel for spark-ignited internal combustion engines.
German invasion of the Netherlands
The German invasion of the Netherlands (Duitse aanval op Nederland), otherwise known as the Battle of the Netherlands (Slag om Nederland), was a military campaign part of Case Yellow (Fall Gelb), the Nazi German invasion of the Low Countries (Belgium, Luxembourg, and the Netherlands) and France during World War II.
See U-boat and German invasion of the Netherlands
German Navy
The German Navy is part of the unified (Federal Defense), the German Armed Forces.
German submarine U-36 (S186)
U-36 (S186) is a Type 212A submarine of the German Navy. U-boat and German submarine U-36 (S186) are submarines of Germany.
See U-boat and German submarine U-36 (S186)
German submarine V-80
The V-80 (Versuchs-U-Boot V 80) was a 76-ton experimental submarine and the only representative of the German Type V design produced for Nazi Germany's Kriegsmarine.
See U-boat and German submarine V-80
German Type Mittel U submarine
Mittel U was a class of U-boats built during World War I by the Kaiserliche Marine.
See U-boat and German Type Mittel U submarine
Grand Fleet
The Grand Fleet was the main battlefleet of the Royal Navy during the First World War.
Greece
Greece, officially the Hellenic Republic, is a country in Southeast Europe.
Gruppenhorchgerät
The Gruppenhorchgerät ('group listening device', abbreviated GHG) was a hydrophone array which was used on vessels of the German Kriegsmarine in World War II. U-boat and Gruppenhorchgerät are u-boats.
See U-boat and Gruppenhorchgerät
Gulf of Mexico
The Gulf of Mexico (Golfo de México) is an ocean basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent.
Hai (midget submarine)
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.
See U-boat and Hai (midget submarine)
Hans Zenker
Hans Zenker (10 August 1870 in Bielitz – 18 August 1932 in Göttingen) was a German admiral.
Harwich
Harwich is a town in Essex, England, and one of the Haven ports on the North Sea coast.
Hedgehog (weapon)
The Hedgehog (also known as an Anti-Submarine Projector) was a forward-throwing anti-submarine weapon that was used primarily during the Second World War.
See U-boat and Hedgehog (weapon)
Hellmuth Walter
Hellmuth Walter (26 August 1900 – 16 December 1980) was a German engineer who pioneered research into rocket engines and gas turbines.
See U-boat and Hellmuth Walter
Herbert Werner
Herbert A. Werner (13 May 1920 – 6 April 2013) was a German submarine officer and captain during World War II.
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.
See U-boat and High Seas Fleet
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.
See U-boat and High-frequency direction finding
Hydrogen
Hydrogen is a chemical element; it has symbol H and atomic number 1.
Hydrogen peroxide
Hydrogen peroxide is a chemical compound with the formula.
See U-boat and Hydrogen peroxide
Imperial German Navy
The Imperial German Navy or the Kaiserliche Marine (Imperial Navy) was the navy of the German Empire, which existed between 1871 and 1919.
See U-boat and Imperial German Navy
Indian Ocean
The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or approx.
Invention
An invention is a unique or novel device, method, composition, idea or process.
Invincible-class submarine
The Invincible-class submarines, formally classified as the Type 218SG submarines, is a class of conventionally-powered attack submarines on order by the Republic of Singapore Navy (RSN) from German-based naval conglomerate ThyssenKrupp Marine Systems (TKMS). U-boat and Invincible-class submarine are submarines of Germany.
See U-boat and Invincible-class submarine
Israeli Navy
The Israeli Navy (חיל הים הישראלי, Ḥeil HaYam HaYisraeli,; 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 Eilat and the Red Sea theater.
Kaiser
Kaiser is the German word for "emperor".
Karl Dönitz
Karl Dönitz (sometimes spelled Doenitz;; 16 September 189124 December 1980) was a German admiral who briefly succeeded Adolf Hitler as head of state in May 1945, holding the position until the dissolution of the Flensburg Government following Germany's unconditional surrender to the Allies days later.
Körting Hannover
Körting Hannover AG (previously Körting Brothers AG) is a long-standing industrial engineering company in Hanover.
See U-boat and Körting Hannover
Kerosene
Kerosene, or paraffin, is a combustible hydrocarbon liquid which is derived from petroleum.
Kiel
Kiel is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 246,243 (2021).
See U-boat and Kiel
Kobben-class submarine
The Kobben class (also known as Type 207) is a customized version of the German Type 205 submarine.
See U-boat and Kobben-class submarine
Kriegsmarine
The Kriegsmarine was the navy of Nazi Germany from 1935 to 1945.
Krupp
Friedrich Krupp AG Hoesch-Krupp (formerly Friedrich Krupp GmbH), trading as Krupp, was the largest company in Europe at the beginning of the 20th century as well as Germany's premier weapons manufacturer during both world wars.
See U-boat and Krupp
Leigh Light
The Leigh Light (L/L) was a British World War II era anti-submarine device used in the Battle of the Atlantic.
Light cruiser
A light cruiser is a type of small or medium-sized warship.
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 military award in Nazi Germany.
See U-boat and List of Knight's Cross of the Iron Cross recipients of the U-boat service
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. U-boat and list of most successful German U-boats are submarines of Germany and u-boats.
See U-boat and List of most successful German U-boats
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. U-boat and List of U-boats never deployed are u-boats.
See U-boat and List of U-boats never deployed
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. U-boat and List of U-boats of Germany are submarines of Germany and u-boats.
See U-boat and List of U-boats of Germany
Loch Ryan
Loch Ryan (Loch Rìoghaine) 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.
Lohmann Affair
The Lohmann Affair or Phoebus Affair was a scandal in the affairs of the German Weimar Republic in 1927, where a secret rearmament programme was uncovered during bankruptcy proceedings of the Phoebus Film AG production company.
Londonderry Port
Londonderry Port, now operating as Foyle Port, is a port located on Lough Foyle in Northern Ireland.
See U-boat and Londonderry Port
Lothar von Arnauld de la Perière
Vizeadmiral Lothar von Arnauld de la Perière (18 March 1886 – 24 February 1941), born in Posen, Prussia, and of French-German descent, was a German U-boat commander during World War I. With 194 ships and sunk, he is the most successful submarine captain ever.
See U-boat and Lothar von Arnauld de la Perière
Magnetic anomaly detector
A magnetic anomaly detector (MAD) is an instrument used to detect minute variations in the Earth's magnetic field.
See U-boat and Magnetic anomaly detector
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.
See U-boat and Magnetic pistol
Mark 24 mine
The Mark 24 mine (also known as FIDO or Fido) is an air-dropped anti-submarine (ASW) acoustic torpedo developed by the United States during World War II; it was called a mine to conceal its capabilities.
Max Valentiner
Captain Christian August Max Ahlmann Valentiner (15 December 1883 – 19 July 1949) was a German U-boat commander during World War I. He was the third highest-scoring U-boat commander of the war, and was awarded the Pour le Mérite for his achievements.
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 sailors who died serving in U-Boat units during the First and Second World Wars, along with all victims of submarine warfare. U-boat and Möltenort U-Boat Memorial are u-boats.
See U-boat and Möltenort U-Boat Memorial
Midget submarine
A midget submarine is any submarine under 150 tons, typically operated by a crew of one or two but sometimes up to six or nine, with little or no on-board living accommodation.
See U-boat and Midget submarine
Military Merit Cross (Prussia)
The Military Merit Cross (German: Militär-Verdienstkreuz) was the highest bravery award of the Kingdom of Prussia for non-commissioned officers and enlisted soldiers.
See U-boat and Military Merit Cross (Prussia)
Molch
Molch (German language: "newt" or "salamander") was an unsuccessful series of one-man midget submarines created during World War II.
See U-boat and Molch
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.
Naval mine
A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines.
Netherlands
The Netherlands, informally Holland, is a country located in Northwestern Europe with overseas territories in the Caribbean.
North Sea
The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium and France.
Nuclear submarine
A nuclear submarine is a submarine powered by a nuclear reactor, but not necessarily nuclear-armed.
See U-boat and Nuclear submarine
NV Ingenieurskantoor voor Scheepsbouw
italic (Dutch: engineer-office for shipbuilding), usually contracted to IvS, was a Dutch dummy company set up in The Hague and funded by the Reichsmarine after World War I in order to maintain and develop German submarine know-how and to circumvent the limitations set by the Treaty of Versailles.
See U-boat and NV Ingenieurskantoor voor Scheepsbouw
Officer
An officer is a person who has a position of authority in a hierarchical organization.
Operation Deadlight
Operation Deadlight was the code name for the Royal Navy operation of November 1945 – February 1946 to scuttle German U-boats surrendered to the Allies after the defeat of Germany near the end of World War II. U-boat and operation Deadlight are u-boats.
See U-boat and Operation Deadlight
Operation Weserübung
Operation Weserübung (Unternehmen Weserübung,, 9 April – 10 June 1940) was the invasion of Denmark and Norway by Nazi Germany during the Second World War and the opening operation of the Norwegian Campaign.
See U-boat and Operation Weserübung
Orkney Wireless Museum
The Orkney Wireless Museum in Kirkwall, Orkney, Scotland, houses a collection of domestic and military wireless equipment.
See U-boat and Orkney Wireless Museum
Oslo
Oslo (or; Oslove) is the capital and most populous city of Norway.
See U-boat and Oslo
Paris Peace Conference (1919–1920)
The Paris Peace Conference was a set of formal and informal diplomatic meetings in 1919 and 1920 after the end of World War I, in which the victorious Allies set the peace terms for the defeated Central Powers.
See U-boat and Paris Peace Conference (1919–1920)
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.
Petty officer
A petty officer (PO) is a non-commissioned officer in many navies.
Plan Z
Plan Z was the re-equipment and expansion of the Kriegsmarine (German navy) ordered by Adolf Hitler in early 1939.
Portugal
Portugal, officially the Portuguese Republic, is a country located on the Iberian Peninsula in Southwestern Europe, whose territory also includes the Macaronesian archipelagos of the Azores and Madeira.
Pour le Mérite
The Pour le Mérite, also informally known as the "Blue Max", is an order of merit (Verdienstorden) established in 1740 by King Frederick II of Prussia.
Pre-dreadnought battleship
Pre-dreadnought battleships were sea-going battleships built from the mid- to late- 1880s to the early 1900s.
See U-boat and Pre-dreadnought battleship
Prize (law)
In admiralty law prizes (from the Old French prise, "taken, seized") are equipment, vehicles, vessels, and cargo captured during armed conflict.
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.
Reichsmarine
The was the name of the German Navy during the Weimar Republic and first two years of Nazi Germany.
Rivet
A rivet is a permanent mechanical fastener.
See U-boat and Rivet
RMS Hesperian
RMS Hesperian was a British ocean liner that was torpedoed and sunk by the German submarine south west by south of the Fastnet Rock in the Atlantic Ocean on 4 September 1915 with the loss of 32 lives, while she was travelling from Liverpool, United Kingdom to Montreal, Canada.
Royal Navy
The Royal Navy (RN) is the naval warfare force of the United Kingdom, British Overseas Territories and Crown Dependencies, and a component of His Majesty's Naval Service.
Russian submarine Forel
Forel (Форель, Forelle - Trout) was a midget submarine designed by and built by Krupp in Kiel, Germany. U-boat and Russian submarine Forel are submarines of Germany.
See U-boat and Russian submarine Forel
Russo-Japanese War
The Russo-Japanese War was fought between the Japanese Empire and the Russian Empire during 1904 and 1905 over rival imperial ambitions in Manchuria and the Korean Empire.
See U-boat and Russo-Japanese War
Saddle tank (submarine)
Saddle tanks are a type of ballast tank configuration fitted to submarines.
See U-boat and Saddle tank (submarine)
Scuttling
A ship is scuttled when its crew deliberately sinks it, typically by opening holes in its hull.
Second Happy Time
The Second Happy Time (officially Operation Paukenschlag ("Operation Drumbeat"), and also known among German submarine commanders as the "American Shooting Season") was a phase in the Battle of the Atlantic during which Axis submarines attacked merchant shipping and Allied naval vessels along the east coast of North America.
See U-boat and Second Happy Time
Seehund
Seehund (German: "seal"), also known as Type XXVII, was a midget submarine built by Nazi Germany during World War II.
Sieglinde (decoy)
Sieglinde was a sonar decoy used during the Second World War by German U-boats. U-boat and Sieglinde (decoy) are u-boats.
See U-boat and Sieglinde (decoy)
Silent Hunter II
Silent Hunter II is a 2001 World War II U-boat combat simulation published by Ubi Soft for PCs with Windows 95/98/ME.
See U-boat and Silent Hunter II
Silent Hunter III
Silent Hunter III is a submarine simulation developed by Ubisoft Bucharest and published by Ubisoft.
See U-boat and Silent Hunter III
Singapore
Singapore, officially the Republic of Singapore, is an island country and city-state in maritime Southeast Asia.
Sinking of the RMS Lusitania
The was a British-registered ocean liner that was torpedoed by an Imperial German Navy U-boat during the First World War on 7 May 1915, about off the Old Head of Kinsale, Ireland. U-boat and Sinking of the RMS Lusitania are German Empire in World War I.
See U-boat and Sinking of the RMS Lusitania
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.
See U-boat and SM U-1 (Germany)
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.
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.
SM U-16 (Germany)
SM U-16 was one of the 329 submarines serving in the Imperial German Navy in World War I.
See U-boat and SM U-16 (Germany)
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 ten ships, damaged one ship and captured two ships, surviving the war without casualty.
See U-boat and SM U-17 (Germany)
SM U-19 (Germany)
SM U-19 was a German Type U-19 U-boat built for the Imperial German Navy.
See U-boat and SM U-19 (Germany)
SM U-2 (Germany)
SM U-2 was a German U-boat built for the Imperial German Navy.
See U-boat and SM U-2 (Germany)
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.
See U-boat and SM U-23 (Germany)
SM U-27 (Germany)
SM U-27 was a German Type ''U-27'' U-boat built for service in the Imperial German Navy.
See U-boat and SM U-27 (Germany)
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.
See U-boat and SM U-3 (Germany)
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.
See U-boat and SM U-43 (Germany)
SM U-5 (Germany)
SM U-5 was a German Type U 5 U-boat built for the Imperial German Navy.
See U-boat and SM U-5 (Germany)
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.
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.
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.
See U-boat and SM U-63 (Germany)
SM U-9
SM U-9 was a German Type U 9 U-boat.
Sonar
Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on or under the surface of the water, such as other vessels.
See U-boat and Sonar
South Korea
South Korea, officially the Republic of Korea (ROK), is a country in East Asia.
Soviet Union
The Union of Soviet Socialist Republics (USSR), commonly known as the Soviet Union, was a transcontinental country that spanned much of Eurasia from 1922 to 1991.
Steam
Steam is a substance containing water in the gas phase, often mixed with air and/or an aerosol of liquid water droplets.
See U-boat and Steam
Stephen King-Hall
William Stephen Richard King-Hall, Baron King-Hall of Headley (21 January 1893 – 2 June 1966) was a British naval officer, writer, politician and playwright who served as the member of parliament for Ormskirk from 1939 to 1945.
See U-boat and Stephen King-Hall
Strategic bombing
Strategic bombing is a systematically organized and executed attack from the air which can utilize strategic bombers, long- or medium-range missiles, or nuclear-armed fighter-bomber aircraft to attack targets deemed vital to the enemy's war-making capability.
See U-boat and Strategic bombing
Submarine
A submarine (or sub) is a watercraft capable of independent operation underwater.
Submarine snorkel
A submarine snorkel is a device which allows a submarine to operate submerged while still taking in air from above the surface.
See U-boat and Submarine snorkel
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.
See U-boat and Submarines of the Imperial Japanese Navy
TCG Gür (1936)
TCG Gür was a German-designed submarine built in 1929-30 by the Echevarrieta y Larrinaga Shipyard in Cádiz, Spain, and bought by the Turkish Navy in 1935 where it served until 1947.
Thorsten Nordenfelt
Thorsten Nordenfelt (1 March 1842 – 8 February 1920), was a Swedish inventor and industrialist.
See U-boat and Thorsten Nordenfelt
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.
Torpedo boat
A torpedo boat is a relatively small and fast naval ship designed to carry torpedoes into battle.
TR-1700-class submarine
The TR-1700 (Santa Cruz) is a class of diesel-electric patrol submarines built by Thyssen Nordseewerke for the Argentine Navy in the 1980s, with two submarines completed. U-boat and tR-1700-class submarine are submarines of Germany.
See U-boat and TR-1700-class submarine
Treaty of Versailles
The Treaty of Versailles was a peace treaty signed on 28 June 1919.
See U-boat and Treaty of Versailles
Tridente-class submarine
The Tridente-class submarines, also designated as U 209PN, are diesel-electric submarines based on the Type 214 submarine developed by Howaldtswerke-Deutsche Werft GmbH (HDW) for the Portuguese Navy.
See U-boat and Tridente-class submarine
Turkey
Turkey, officially the Republic of Türkiye, is a country mainly in Anatolia in West Asia, with a smaller part called East Thrace in Southeast Europe.
Type 201 submarine
The Type 201 was Germany's first U-boat class built after World War II.
See U-boat and Type 201 submarine
Type 205 submarine
The Type 205 was a class of German diesel-electric submarines.
See U-boat and Type 205 submarine
Type 206 submarine
The Type 206 is a class of diesel-electric submarines (U-boats) developed by Howaldtswerke-Deutsche Werft (HDW).
See U-boat and Type 206 submarine
Type 209 submarine
The Type 209 (U-Boot-Klasse 209) is a range of diesel-electric attack submarines developed exclusively for export by Howaldtswerke-Deutsche Werft of Germany.
See U-boat and Type 209 submarine
Type 212A submarine
The Type 212A is a class of diesel-electric submarine developed by Howaldtswerke-Deutsche Werft AG (HDW) for the German Navy (German: U-Boot-Klasse 212 A), and the Italian Navy where it is known as the Todaro class.
See U-boat and Type 212A submarine
Type 214 submarine
The Type 214 is a class of diesel–electric submarines developed exclusively for export by Howaldtswerke-Deutsche Werft GmbH (HDW).
See U-boat and Type 214 submarine
Type 216 submarine
The Type 216 is a submarine design concept announced by Howaldtswerke-Deutsche Werft based on the Type 212/214. U-boat and Type 216 submarine are submarines of Germany.
See U-boat and Type 216 submarine
Type I submarine
The Type I U-boat was the first post–World War I attempt to produce an oceangoing submarine for Nazi Germany's Kriegsmarine.
See U-boat and Type I submarine
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.
See U-boat and Type II submarine
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.
See U-boat and Type IX submarine
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.
See U-boat and Type U 139 submarine
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).
See U-boat and Type U 151 submarine
Type U 31 submarine
Type U 31 was a class of U-boats built during World War I by the Kaiserliche Marine.
See U-boat and Type U 31 submarine
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.
See U-boat and Type U 66 submarine
Type UB I submarine
The Type UB I submarine (sometimes known as the UB-1 class) was a class of small coastal submarines (U-boats) built in Germany at the beginning of the First World War.
See U-boat and Type UB I submarine
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.
See U-boat and Type UB II submarine
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.
See U-boat and Type UB III submarine
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).
See U-boat and Type UC I submarine
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.
See U-boat and Type UC II submarine
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.
See U-boat and Type UC III submarine
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.
See U-boat and Type UE I submarine
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.
See U-boat and Type UE II submarine
Type VII submarine
Type VII U-boats were the most common type of German World War II U-boat.
See U-boat and Type VII submarine
Type X submarine
Type X (XB) U-boats were a special type of German submarine (U-boat).
See U-boat and Type X submarine
Type XIV submarine
The Type XIV U-boat was designed to resupply other U-boats,Rössler (2001), p. 151.
See U-boat and Type XIV submarine
Type XVII submarine
The Type XVII U-boats were small coastal submarines that used a high-test peroxide propulsion system, which offered a combination of air-independent propulsion and high submerged speeds.
See U-boat and Type XVII submarine
Type XXI submarine
Type XXI submarines were a class of German diesel–electric Elektroboot (German: "electric boat") submarines designed during the Second World War.
See U-boat and Type XXI submarine
Type XXIII submarine
German Type XXIII submarines were the first so-called elektroboote ("electric boats") to become operational.
See U-boat and Type XXIII submarine
Ula-class submarine
The Ula class is a Norwegian submarine type which was assembled in Germany in the late 1980s and early 1990s. U-boat and Ula-class submarine are submarines of Germany.
See U-boat and Ula-class submarine
Ultra (cryptography)
adopted by British military intelligence in June 1941 for wartime signals intelligence obtained by breaking high-level encrypted enemy radio and teleprinter communications at the Government Code and Cypher School (GC&CS) at Bletchley Park.
See U-boat and Ultra (cryptography)
Uncompleted U-boat projects
During World War II, Nazi Germany's Kriegsmarine considered various submarine designs for specialized operations or improving U-boat performance.
See U-boat and Uncompleted U-boat projects
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of the continental mainland.
United States
The United States of America (USA or U.S.A.), commonly known as the United States (US or U.S.) or America, is a country primarily located in North America.
United States declaration of war on Germany (1917)
On April 2, 1917, President Woodrow Wilson asked a special joint session of the United States Congress for a declaration of war against the German Empire. U-boat and United States declaration of war on Germany (1917) are German Empire in World War I.
See U-boat and United States declaration of war on Germany (1917)
Unrestricted submarine warfare
Unrestricted submarine warfare is a type of naval warfare in which submarines sink merchant ships such as freighters and tankers without warning.
See U-boat and Unrestricted submarine warfare
Vetehinen-class submarine
The Vetehinen-class submarine was a Finnish 500-tonne submarine class of three vessels that was designed and built in the 1920s and early 1930s.
See U-boat and Vetehinen-class submarine
Walther Forstmann
Walther Forstmann (9 March 1883 – 2 November 1973) was one of the most highly decorated U-boat commanders in the Kaiserliche Marine during World War I. He also served in the Kriegsmarine during World War II in different staff positions.
See U-boat and Walther Forstmann
Weimar Republic
The Weimar Republic, officially known as the German Reich, was a historical period of Germany from 9 November 1918 to 23 March 1933, during which it was a constitutional federal republic for the first time in history; hence it is also referred to, and unofficially proclaimed itself, as the German Republic.
See U-boat and Weimar Republic
Welding
Welding is a fabrication process that joins materials, usually metals or thermoplastics, primarily by using high temperature to melt the parts together and allow them to cool, causing fusion.
Wilhelm Bauer
Wilhelm Bauer (23 December 1822 – 20 June 1875) was a German engineer who built several hand-powered submarines.
Winston Churchill
Sir Winston Leonard Spencer Churchill (30 November 187424 January 1965) was a British statesman, soldier, and writer who was twice Prime Minister of the United Kingdom, from 1940 to 1945 during the Second World War, and 1951 to 1955.
See U-boat and Winston Churchill
Wolfgang Petersen
Wolfgang Petersen (14 March 1941 – 12 August 2022) was a German filmmaker.
See U-boat and Wolfgang Petersen
Wolfpack (naval tactic)
The wolfpack was a convoy attack tactic employed in the Second World War.
See U-boat and Wolfpack (naval tactic)
World war
A world war is an international conflict that involves most or all of the world's major powers.
World War I
World War I (alternatively the First World War or the Great War) (28 July 1914 – 11 November 1918) was a global conflict between two coalitions: the Allies (or Entente) and the Central Powers.
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two alliances: the Allies and the Axis powers.
See also
Germany in World War II
- Battle of Remagen
- Battle of the Ruhr
- Birkenkopf
- Bormann dictations
- Case Brown
- European Advisory Commission
- Food and agriculture in Nazi Germany
- French declaration of war on Germany (1939)
- Göring Telegram
- German war crimes
- German–Yugoslav Partisan negotiations
- Greater Germanic Reich
- Guderian-Plan
- Himmler's wartime diaries
- Hitler's Warriors
- Kurt Martin
- Kvarstad vessels
- Military history of Germany during World War II
- Nazi foreign policy debate
- Operation Cowboy
- Operation Desert
- Operation Margarethe II
- The Holocaust in Germany
- Turkish declaration of war on Germany and Japan
- U-boat
- United Kingdom declaration of war on Germany (1939)
- Wilhelm Gustloff Stiftung
- XGRS
Submarines by type
- Attack submarines
- Ballistic missile submarines
- Coastal submarine
- Cruiser submarine
- Deep-submergence vehicles
- Fleet submarine
- Flying submarine
- Merchant submarines
- Mesoscaphe
- Midget submarines
- Nuclear-powered submarines
- Semi-submarine
- Semi-submersible
- Submarine aircraft carrier
- Submarine aircraft carriers
- U-boat
Submarines of the Imperial German Navy
Submarines of the Kriegsmarine
- Befehlshaber der U-Boote
- Foreign U-boats
- HMS H6
- Italian submarine Comandante Cappellini
- List of U-boat flotillas
- U-boat
- Yugoslav submarine Sava
U-boats
- Atlantic U-boat campaign of World War I
- Battle of the Caribbean
- Battle of the St. Lawrence
- Befehlshaber der U-Boote
- Bold (decoy)
- Führer der Unterseeboote
- Foreign U-boats
- German U-boat bases in occupied Norway
- Gruppenhorchgerät
- List of German U-boats in World War II
- List of German U-boats in World War II (1-599)
- List of German U-boats in World War II (600-4712)
- List of U-boat flotillas
- List of U-boat types
- List of U-boats never deployed
- List of U-boats of Germany
- List of most successful German U-boats
- List of the largest ships hit by U-boats in World War I
- List of wolfpacks of World War II
- Lists of U-boats
- Möltenort U-Boat Memorial
- Mediterranean U-boat campaign of World War II
- Metox radar detector
- Operation Deadlight
- Operation Neuland
- Operationsbefehl Hartmut
- Shadow Divers
- Sieglinde (decoy)
- Sonar decoy
- Submarine films
- Type XXVI submarine
- U-boat
- U-boat Campaign (World War I)
- U-boat War Badge
- U-boat campaign
World War I submarines
World War II submarines
- HNoMS B-5
- List of specifications of submarines of World War II
- List of submarines of World War II
- Matchanu-class submarine
- U-boat
References
Also known as Eiserne Särge, German U-boat, German U-boats, German submarine, German submarines, U Boat, U boats, U boot, U-Boats, U-Boot, Uboat, Undersea boat, Underseaboat, Unterseeboot.
, Enigma machine, Erich Raeder, Erwin Rommel, Escort carrier, Fanfare (decoy), Ferromagnetism, Finnish submarine Saukko, Finnish submarine Vesikko, First Happy Time, Foxer, Friedrich Krupp Germaniawerft, Fuel cell, G7a torpedo, G7e torpedo, G7es torpedo, Gal-class submarine, Gasoline, German invasion of the Netherlands, German Navy, German submarine U-36 (S186), German submarine V-80, German Type Mittel U submarine, Grand Fleet, Greece, Gruppenhorchgerät, Gulf of Mexico, Hai (midget submarine), Hans Zenker, Harwich, Hedgehog (weapon), Hellmuth Walter, Herbert Werner, High Seas Fleet, High-frequency direction finding, Hydrogen, Hydrogen peroxide, Imperial German Navy, Indian Ocean, Invention, Invincible-class submarine, Israeli Navy, Kaiser, Karl Dönitz, Körting Hannover, Kerosene, Kiel, Kobben-class submarine, Kriegsmarine, Krupp, Leigh Light, Light cruiser, List of Knight's Cross of the Iron Cross recipients of the U-boat service, List of most successful German U-boats, List of U-boats never deployed, List of U-boats of Germany, Loch Ryan, Lohmann Affair, Londonderry Port, Lothar von Arnauld de la Perière, Magnetic anomaly detector, Magnetic pistol, Mark 24 mine, Max Valentiner, Möltenort U-Boat Memorial, Midget submarine, Military Merit Cross (Prussia), Molch, Monsun Gruppe, Naval mine, Netherlands, North Sea, Nuclear submarine, NV Ingenieurskantoor voor Scheepsbouw, Officer, Operation Deadlight, Operation Weserübung, Orkney Wireless Museum, Oslo, Paris Peace Conference (1919–1920), Periscope, Petty officer, Plan Z, Portugal, Pour le Mérite, Pre-dreadnought battleship, Prize (law), Q-ship, Reichsmarine, Rivet, RMS Hesperian, Royal Navy, Russian submarine Forel, Russo-Japanese War, Saddle tank (submarine), Scuttling, Second Happy Time, Seehund, Sieglinde (decoy), Silent Hunter II, Silent Hunter III, Singapore, 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, Steam, Stephen King-Hall, Strategic bombing, Submarine, Submarine snorkel, Submarines of the Imperial Japanese Navy, TCG Gür (1936), Thorsten Nordenfelt, Torpedo, Torpedo boat, TR-1700-class submarine, Treaty of Versailles, Tridente-class submarine, Turkey, Type 201 submarine, Type 205 submarine, Type 206 submarine, Type 209 submarine, Type 212A submarine, Type 214 submarine, Type 216 submarine, Type I submarine, Type II submarine, Type IX submarine, Type U 139 submarine, Type U 151 submarine, Type U 31 submarine, Type U 66 submarine, Type UB I submarine, Type UB II submarine, Type UB III submarine, Type UC I submarine, Type UC II submarine, Type UC III submarine, Type UE I submarine, Type UE II submarine, Type VII submarine, Type X submarine, Type XIV submarine, Type XVII submarine, Type XXI submarine, Type XXIII submarine, Ula-class submarine, Ultra (cryptography), Uncompleted U-boat projects, United Kingdom, United States, United States declaration of war on Germany (1917), Unrestricted submarine warfare, Vetehinen-class submarine, Walther Forstmann, Weimar Republic, Welding, Wilhelm Bauer, Winston Churchill, Wolfgang Petersen, Wolfpack (naval tactic), World war, World War I, World War II.