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In 1913, the surviving units among the large heterogeneous array of older Torpedo Boat Destroyer types of the "27-knotter" and "30-knotter" varieties were organised into the A, B, C and D classes according to their design speed and the number of funnels they possessed. The earlier "26-knotters" were not included as all six vessels had been deleted before 1913.
Unlike the A, B and C classes, all the (two-funnel) D class were built by one shipbuilder (Thornycroft) and comprised a single class, with minor modifications between batches.
In 1913, lettered names were given to all Royal Navy destroyers, previously known after the first ship of that class. The River or E class of 1913 were the first destroyers of the Royal Navy with a recognisable modern configuration.
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. They were originally conceived in 1885 by Fernando Villaamil for the Spanish Navy as a defense against torpedo boats, and by the time of the Russo-Japanese War in 1904, these "torpedo boat destroyers" (TBDs) were "large, swift, and powerfully armed torpedo boats designed to destroy other torpedo boats". Although the term "destroyer" had been used interchangeably with "TBD" and "torpedo boat destroyer" by navies since 1892, the term "torpedo boat destroyer" had been generally shortened to simply "destroyer" by nearly all navies by the First World War.
HMAS Nepal (G25/D14) was an N-class destroyer of the Royal Australian Navy (RAN). Launched in 1941 as Norseman, the ship suffered significant damage during an air raid on the John I. Thornycroft and Company shipyard, and during repairs was renamed to recognise Nepal's contribution to the British war effort. Although commissioned into the RAN in 1942, the ship remained the property of the Royal Navy.
The Fleet Rehabilitation and Modernization (FRAM) program of the United States Navy extended the lives of World War II-era destroyers by shifting their mission from a surface attack role to that of a submarine hunter. The FRAM program also covered cruisers, aircraft carriers, submarines, amphibious ships, and auxiliaries. The United States Coast Guard also used this term in the 1980s for the modernization of its Hamilton-class cutters.
The A- and B-class destroyers were a group of 18 destroyers built for the Royal Navy during the late 1920s, with two additional ships built for the Royal Canadian Navy. The British ships were divided into two flotillas of eight destroyers, each with a flotilla leader.
The Gearing class was a series of 98 destroyers built for the U.S. Navy during and shortly after World War II. The Gearing design was a minor modification of the Allen M. Sumner class, whereby the hull was lengthened by 14 ft (4.3 m) at amidships, which resulted in more fuel storage space and increased the operating range.
The Fletcher class was a class of destroyers built by the United States during World War II. The class was designed in 1939, as a result of dissatisfaction with the earlier destroyer leader types of the Porter and Somers classes. Some went on to serve during the Korean War and into the Vietnam War.
The Allen M. Sumner class was a group of 58 destroyers built by the United States during World War II. Another twelve ships were completed as destroyer minelayers. The class was named for Allen Melancthon Sumner, an officer in the United States Marine Corps. Often referred to as simply the Sumner, this class was distinguished from the previous Fletcher class by their twin 5-inch/38 caliber gun mounts, dual rudders, additional anti-aircraft weapons, and many other advancements. The Allen M. Sumner design was extended 14 feet (4.3 m) amidships to become the Gearing class, which was produced in larger numbers but did not see significant service in World War II.
The V and W class was an amalgam of six similar classes of destroyer built for the Royal Navy under the 9th, 10th, 13th and 14th of fourteen War Emergency Programmes during the First World War and generally treated as one class. For their time they were among the most powerful and advanced ships of their type in the world, and set the trend for future British designs.
The River-class destroyer was a class of torpedo boat destroyer built for the Royal Navy in the first few years of the 20th century, and which saw extensive service in World War I. These 37 vessels were all constructed to disparate builders' designs, just like the preceding classes.
The Serrano class was a series of six destroyers, built to a British design, which served with the Chilean Navy from 1928 to 1967. In 1927 Chile ordered the Serrano class from John I. Thornycroft & Company in the United Kingdom at the cost of £230,000 for each ship to enhance the Chilean Navy's ability to patrol its extensive coastline. The six vessels were completed by 1929. Serrano, Orella and Hyatt were equipped for minelaying, and Aldea, Riquelme and Videla for minesweeping.
The M class, more properly known as the Admiralty M class, were a class of 85 destroyers built for the Royal Navy of United Kingdom that saw service during World War I. All ships were built to an identical – Admiralty – design, hence the class name. Eighteen other vessels which were officially included within the 'M' class were built to variant designs by three specialist builders – 10 by Yarrow, 6 by Thornycroft, and 2 by Hawthorn Leslie; these are covered in other articles.
The D class as they were known from 1913 was a fairly homogeneous group of torpedo boat destroyers (TBDs) built for the Royal Navy in the mid-1890s. They were all constructed to the individual designs of their builder, John I. Thornycroft & Company of Chiswick, to meet Admiralty specifications. The uniting feature of the class was a top speed of 30 knots and they all had two funnels.
Two Daring-class destroyers were the very first torpedo boat destroyers ("TBDs") to be ordered for the Royal Navy, the order being placed on 27 June 1892.
The three Ardent-class torpedo boat destroyers were ordered by the British Admiralty on 12 October 1893 and served with the Royal Navy. Built by Thornycroft for a contract price of £110,520 for all three vessels, they displaced 301 tons fully laden, and were 201 feet 8 inches (61.47 m) long overall.
HMS Berkeley was a Type I Hunt-class destroyer of the Royal Navy. She was a member of the first subgroup of the Hunt class and saw service in World War II before being bombed at Dieppe and then scuttled by HMS Albrighton.
There have been a number of 21-inch torpedoes in service with the United States. These have been used on ships and submarines of the U.S. Navy. American 21-inch torpedoes are 533 millimeters (21 in) in diameter.