Type VII U-boats were the most common type of German World War II U-boat. 703 boats were built by the end of the war. The lone surviving example, U-995, is on display at the Laboe Naval Memorial located in Laboe, Schleswig-Holstein, Germany.
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 front company NV Ingenieurskantoor voor Scheepsbouw Den Haag (I.v.S) and built in 1933 by the Finnish Crichton-Vulcan shipyard in Turku, Finland. It was too small to undertake sustained operations far away from the home support facilities. Its primary role was found to be in the training schools, preparing new German naval officers for command. It appeared in four sub-types.
U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. The term is an anglicized version of the German word U-Boot, a shortening of Unterseeboot, though the German term refers to any submarine. Austro-Hungarian Navy submarines were also known as U-boats.
Type XXI submarines were a class of German diesel–electric Elektroboot submarines designed during the Second World War. One hundred and eighteen were completed, with four being combat-ready. During the war only two were put into active service and went on patrols, but these were not used in combat.
German Type XXIII submarines were the first so-called elektroboote to become operational. They were small coastal submarines designed to operate in the shallow waters of the North Sea, Black Sea and Mediterranean Sea, where larger Type XXI electric boats were at risk in World War II. They were so small they could carry only two torpedoes, which had to be loaded externally. As with their far larger sisters—the Type XXI—they were able to remain submerged almost all of the time and were faster than conventional U-boats, due to the improved streamlining of their shape, batteries with larger capacity and the snorkel, which allowed the diesel engines to be used while submerged. The Type XXI and XXIII U-boats revolutionized post-war submarine design. Nearly a thousand Type XXIII boats were projected towards the close of World War II, but most of these were either cancelled, scrapped incomplete, or only projected.
The Type 205 was a class of German diesel-electric submarines. They were single-hull vessels optimized for the use in the shallow Baltic Sea. The Type 205 is a direct evolution of the Type 201 class with lengthened hull, new machinery and sensors. The biggest difference though is that ST-52 steel is used for the pressure hull since the Type 201's non-magnetic steel proved to be problematic. Type 206, the follow-on class, finally succeeded with non-magnetic steel hulls.
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.
The UB II type submarine was a class of U-boat built during World War I by the German Imperial Navy. They were enlarged from the preceding type UB I and were more effective vessels. The boats were a single hull design with a 50-metre maximum diving depth and a 30-45 second diving time. In 1915 and 1916, 30 were built at two different shipyards.
German submarine U-1 was the first U-boat built for Nazi Germany's Kriegsmarine following Adolf Hitler's abrogation of the terms of the Treaty of Versailles in 1935, which banned Germany possessing a submarine force.
Seehund, also known as Type XXVII, was a midget submarine built by Nazi Germany during World War II. Designed in 1944 and operated by two-man crews, it was used by the Kriegsmarine during the closing months of the war, sinking nine merchant vessels and damaging an additional three, while losing 35 boats, mostly attributed to bad weather. The French Navy used four captured boats after the war until 1953.
NV Ingenieurskantoor voor Scheepsbouw, 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. The company designed several submarine types for paying countries, including the Soviet S-class submarine, as well as the prototypes for the German Type II submarines and Type VII submarines.
During World War II, Nazi Germany's Kriegsmarine considered various submarine designs for specialized operations or improving U-boat performance. Many of these designs did not come to fruition for various reasons; some were abandoned due to practical considerations, while others towards the end of the war had to be abandoned as the yards where they were being built were overrun by allied forces.
Kaiserliche Werft Danzig was a German shipbuilding company founded in 1852 as Königliche Werft Danzig and renamed Kaiserliche Werft after the proclamation of the German Empire in 1871. Together with Kaiserliche Werft Kiel and Kaiserliche Werft Wilhelmshaven it was one of three shipyards responsible for maintenance, repair and construction of warships for the Imperial German Navy. Kaiserliche Werft Danzig closed in 1918 after the end of World War I, but soon opened when Danziger Werft was founded on its site in 1919.
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.
The Schichau-Werke was a German engineering works and shipyard based in Elbing, Germany on the Frisches Haff of then-East Prussia. It also had a subsidiary shipyard in nearby Danzig. Due to the Soviet conquest of eastern Germany, Schichau moved to Bremerhaven in March 1945, and its successors continued in business until 2009.
SM U-115 was a German Type U 115 U-boat of the Imperial German Navy built at Schichau-Werke, Elbing. As her sister ship SM U-116, she was never completed and ultimately broken up in Danzig after the armistice. Her main engines were used in M/S Adolf Sommerfeld ex SMS Gefion. Both boats had been offered to the IGN free of charge by Schichau in an attempt to gain experience in building submarines. When construction of the two boats began to lag behind due to shortages in raw materials and lack of experience in submarine construction, they were declared "war boats" (Kriegsboote), formally ordered by the Reichsmarineamt and given their respective designation. Though 14 more boats of the class were ordered on 29 June 1918 for delivery in 1919, on 20 October 1918, Schichau-Werke reported U 115 would not be ready for delivery until the spring of 1919. None of the 16 planned units would be complete before the end of the war.
The S-99 experimental submarine was the only ship of the Project 617 class that the Soviet Union built during the early Cold War. She was the only Soviet submarine which used a German Walter turbine fueled by high-test peroxide (HTP). Entering service in 1956, the boat was assigned to a training unit of the Baltic Fleet. S-99 was badly damaged by a HTP explosion in 1959 and was not repaired. The submarine was decommissioned in 1964 and subsequently scrapped.
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. The boat was built by Kaiserliche Werft Danzig and was launched on 27 March 1909.
The Ingenieurbüro Glückauf was a department of the Reich Ministry of Armaments and War Production, which during the Second World War was the design office of the Hauptausschuß Schiffbau. It completed construction and production plans for U-Boats of the Kriegsmarine. This affected both submarine types that were designed for the U-boat war, as well as midget submarines which were used by the small combat units of the Kriegsmarine.
Kriegsmarine (planned)