The Imperial German Navy or the Imperial Navy was the navy of the German Empire, which existed between 1871 and 1919. It grew out of the small Prussian Navy, which was mainly for coast defence. Kaiser Wilhelm II greatly expanded the navy. The key leader was Admiral Alfred von Tirpitz, who greatly expanded the size and quality of the navy, while adopting the sea power theories of American strategist Alfred Thayer Mahan. The result was a naval arms race with Britain, as the German navy grew to become one of the greatest maritime forces in the world, second only to the Royal Navy.
The Royal Navy's T class of diesel-electric submarines was designed in the 1930s to replace the O, P, and R classes. Fifty-three members of the class were built just before and during the Second World War, where they played a major role in the Royal Navy's submarine operations. Four boats in service with the Royal Netherlands Navy were known as the Zwaardvisch class.
HMS A5 was an early Royal Navy submarine. She was a member of Group Two of the first British A class of submarines. Like all members of her class, she was built at Vickers Barrow-in-Furness.
The A class was the Royal Navy's first class of British-designed submarines. Thirteen were built by Vickers at Barrow-in-Furness between 1902 and 1905 as an improvement on the US Plunger class.
The Naval Laws were five separate laws passed by the German Empire, in 1898, 1900, 1906, 1908, and 1912. These acts, championed by Kaiser Wilhelm II and his Secretary of State for the Navy, Grand Admiral Alfred von Tirpitz, committed Germany to building up a navy capable of competing with the Royal Navy of the United Kingdom.
Holland 1 is the first submarine commissioned by the Royal Navy. The first in a six-boat batch of the Holland-class submarine, she was lost in 1913 while under tow to be scrapped following her decommissioning. Recovered in 1982, she was put on display at the Royal Navy Submarine Museum, Gosport. Her battery bank found in the boat was discovered to be functional after being cleaned and recharged.
The history of the submarine spans the entire history of human endeavour as mankind has since early civilisation sought to explore and travel under the sea. Humanity has employed a variety of methods to travel underwater for exploration, recreation, research and significantly, warfare. While early attempts, such as those by Alexander the Great, were rudimentary, the advent of new propulsion systems, fuels, and sonar, propelled an increase in submarine technology. The introduction of the diesel engine, then the nuclear submarine, saw great expansion in submarine use – and specifically military use – during World War I, World War II, and the Cold War. The Second World War use of the U-Boat by the German Navy against the Royal Navy and commercial shipping, and the Cold War's use of submarines by the United States and Russia, helped solidify the submarine's place in popular culture. The latter conflicts also saw an increasing role for the military submarine as a tool of subterfuge, hidden warfare, and nuclear deterrent. The military use of submarines continues to this day, predominantly by North Korea, China, the United States and Russia.
The British U-class submarines were a class of 49 small submarines built just before and during the Second World War. The class is sometimes known as the Undine class, after the first submarine built. A further development was the British V-class submarine of 1942.
The Royal Navy Submarine Service is one of the five fighting arms of the Royal Navy. It is sometimes known as the Silent Service, as submarines are generally required to operate undetected.
Gymnote was one of the world's first all-electric submarines and the first functional submarine equipped with torpedoes.
HMS E9 was a British E class submarine built by Vickers, Barrow. She was laid down on 1 June 1912 and was commissioned on 18 June 1914.
HMS Conflict was the lead ship of the Conflict-class destroyers built by J. Samuel White, at East Cowes, Isle of Wight for the Royal Navy. She was launched on 13 December 1894, and entered service in 1899. After an initial spell in the Mediterranean Fleet, Conflict returned to British waters, where she served the rest of her career. Conflict was part of the Portsmouth Local Defence Flotilla during the First World War, which she survived. Conflict was sold for scrap on 20 May 1920.
HMS Wizard was a Conflict-class destroyer built by the White shipyard for the Royal Navy, and launched on 26 February 1895. In 1910, she was reconstructed with only two funnels. She is believed to be the only destroyer fitted with in turning screws. She was sold in 1920.
HMS Starfish was a Sturgeon-class destroyer which served with the Royal Navy. Built by Vickers, she was launched in 1895 and sold in 1912.
The QF 3-pounder Hotchkiss or in French use Canon Hotchkiss à tir rapide de 47 mm were a family of long-lived light 47 mm naval guns introduced in 1886 to defend against new, small and fast vessels such as torpedo boats and later submarines. There were many variants produced, often under license which ranged in length from 32 to 50 calibers but 40 caliber was the most common version. They were widely used by the navies of a number of nations and often used by both sides in a conflict. They were also used ashore as coastal defense guns and later as an anti-aircraft gun, whether on improvised or specialized HA/LA mounts.
Gustave Zédé was one of the world's earliest commissioned naval submarines. She was launched on 1 July 1893 at Toulon, France, although only formally entering service with the French Navy in May 1900 after a long series of trials and design alterations. The submarine carried out the first successful torpedo attack by a submerged vessel against a surface ship.
HMS Proteus was a Parthian-class submarine designed and built by Vickers Shipbuilding and Engineering in Barrow-in-Furness for the Royal Navy. She was laid down on 18 July 1928, launched on 22 August 1929 and completed on 17 June 1930. Like other submarines in her class she served on the China Station before the war. In the Second World War, mainly based at Alexandria in the Mediterranean, Proteus sank 15 enemy vessels and damaged several others during her service.
Hrabri (Brave) was the lead boat of the Hrabri-class submarines; built for the Kingdom of Serbs, Croats and Slovenes– Yugoslavia by the Vickers-Armstrong Naval Yard in the United Kingdom. Launched in 1927, her design was based on the British L-class submarine of World War I, and was built using parts from an L-class submarine that was never completed. The Hrabri-class were the first submarines to serve in the Royal Yugoslav Navy (KM), and after extensive sea trials and testing Hrabri sailed from the UK to the Adriatic coast of Yugoslavia, arriving in April 1928. The submarine was armed with six bow-mounted 533 mm (21 in) torpedo tubes, two 102 mm (4 in) deck guns, one QF 2-pounder L/39 anti-aircraft gun and two machine guns. Its maximum diving depth was restricted to 55 metres (180 ft) by Yugoslav naval regulations.
The TB 114 class was a class of four 160-foot torpedo boats built for the British Royal Navy in 1903–1905 by the shipbuilder J. Samuel White. All four ships served in local defence flotillas during the First World War, with one of the ships being sunk in 1918. The remaining three ships were withdrawn from use after the end of the war, with the last of the class sold for scrap in 1921.
Royal Navy 
