The British L-class submarine is an improved version of a submarine that served throughout which war ?
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British L-class submarine The British L-class submarine was originally planned under the emergency war programme as an improved version of the British E-class submarine. The scale of change allowed the L class to become a separate class.
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British E-class submarine The British E class submarines started out as improved versions of the British D class submarine. The E class served with the Royal Navy throughout World War I as the backbone of the submarine fleet. The last surviving E class submarines were withdrawn from service by 1922.
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BL 7.5-inch naval howitzer The BL 7.5-inch howitzer (naval) was a British anti-submarine mortar developed during World War I.
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HMS Supreme (P252) HMS "Supreme" was a S-class submarine of the third batch built for the Royal Navy during World War II. She survived the war and was sold for scrap in 1950.
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HMS Sea Nymph (P223) HMS "Sea Nymphe" was a S-class submarine of the third batch built for the Royal Navy during World War II. She survived the war and was scrapped in 1948.
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HMS A10 HMS "A10" was an A-class submarine built for the Royal Navy in the first decade of the 20th century. After surviving World War I, she was sold for scrap in 1919.
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HMS Whitley (L23) HMS "Whitley" (L23), ex-Whitby, was an W-class destroyer of the British Royal Navy that saw service in the British campaign in the Baltic Sea against Bolshevik forces during the Russian Civil War and in the early months of World War II.
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HMS Whirlwind (D30) The first HMS "Whirlwind" (R87) was a W-class destroyer of the British Royal Navy that saw service during World War I and World War II.
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Mackerel-class submarine The "Mackerel"-class submarines were a pair of experimental prototype submarines built just prior to World War II and launched in 1940 and 1941. The two submarines were similar in size and capability to the S-class submarines built at the end of World War I, and had been ordered to test the feasibility of using mass production techniques to build small submarines. Until at least 1940 it was thought that mass production of fleet submarines would be impractical, and in any case small submarines could provide area defense for submarine bases. Once it became apparent that there would be sufficient production of the more capable "Gato"-class submarine s, interest in the design waned and no additional small submarines were ordered. Submarine production standardized during the war on the "Gato" class and its successors, the "Balao" and "Tench"-class submarines. In some references, the "Mackerel"s are called the "M class".
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HMS L25 HMS "L25" was a L-class submarine built for the Royal Navy during World War I. She was one of five boats in the class to be fitted as a minelayer. The boat survived the war and was sold for scrap in 1935.
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HMS L24 HMS "L24" was a L-class submarine built for the Royal Navy during World War I. The boat was not completed before the end of the war and was sunk in an accidental collision in 1924.
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HMS E8 HMS "E8" was a British E-class submarine built at Chatham Dockyard. She was laid down on 30 March 1912 and was commissioned on 18 June 1914. She cost £105,700. During World War I she was part of the British submarine flotilla in the Baltic.
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HMS Salmon (N65) HMS "Salmon" was a Royal Navy S-class submarine which was launched on 30 April 1934, and fought in the Second World War. "Salmon" is one of twelve boats named in the song "Twelve Little S-Boats".
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HMS L71 HMS "L71" was a late-model L-class submarine built for the Royal Navy during the First World War. The boat was not completed before the end of the war and was sold for scrap in 1938.
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HMS Vivien (L33) HMS "Vivien" (L33) was a V-class destroyer of the British Royal Navy that saw service in World War I and World War II.
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Yugoslav submarine Nebojša The Yugoslav submarine "Nebojša" was the second of the "Hrabri"-class diesel-electric submarines built by the Vickers-Armstrong Naval Yard on the River Tyne in the United Kingdom, for the Kingdom of Serbs, Croats and Slovenes (later Yugoslavia) and was launched in 1927. Her design was based on that of the British L-class submarine of World War I, and she was built using parts originally assembled for a Royal Navy L-class submarine that was never built. She was armed with six bow-mounted 533 mm torpedo tubes, two 102 mm guns and one machine gun, and could dive to 60 m .
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Submarine aircraft carrier A submarine aircraft carrier is a submarine equipped with aircraft for observation or attack missions. These submarines saw their most extensive use during World War II, although their operational significance remained rather small. The most famous of them were the Japanese I-400 class submarine and the  , although small numbers of similar craft were built for other nations' navies as well.
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I-121-class submarine The I-121"-class submarine (伊百二十一型潜水艦 , I-hyaku-ni-jū-ichi-gata sensuikan ) was a class of submarine in the Imperial Japanese Navy (IJN), serving from the 1920s to the Second World War. The IJN classed it as a Kiraisen" type submarine (機雷潜型潜水艦 , Kiraisen-gata sensuikan ) . The type name, was shortened to Kirai Fusetsu Sensuikan (機雷敷設潜水艦 , Minelaying submarine ) .
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HMS Exmoor (L61) HMS "Exmoor" was a Hunt-class destroyer of the Royal Navy. She was a member of the first subgroup of the class, and saw service in the Second World War, before being sunk by German E-boats in 1941.
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HMS G11 HMS "G11" was a G-class submarine of the Royal Navy in service during the First World War. One of six of her class built by Vickers at Barrow in Furness, she was launched on 22 February 1916, and commissioned on 13 May 1916.
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German submarine U-78 (1940) German submarine "U-78" was a Type VIIC submarine of Nazi Germany's "Kriegsmarine" during World War II. She was the only German submarine to be sunk by land-based artillery fire during the war.
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HMS Spearhead (P263) HMS "Spearhead" was a S-class submarine of the third batch built for the Royal Navy during World War II. She survived the war and was sold to Portugal.