A destroyer tender or destroyer depot ship is a type of

depot ship A depot ship is an auxiliary ship used as a mobile or fixed base for submarines, destroyers, minesweepers, fast attack craft, landing craft, or other small ships with similarly limited space for maintenance equipment and crew dining, berthing and ...

: an

auxiliary ship An auxiliary ship is a naval ship designed to support combatant ships and other naval operations. Auxiliary ships are not primary combatant vessels, though they may have some limited combat capacity, usually for purposes of self-defense. Auxil ...

designed to provide maintenance support to a flotilla of

destroyer In naval terminology, a destroyer is a fast, manoeuvrable, long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against powerful short range attackers. They were originally developed in ...

s or other small

warship A warship or combatant ship is a naval ship that is built and primarily intended for naval warfare. Usually they belong to the armed forces of a state. As well as being armed, warships are designed to withstand damage and are usually faster a ...

s. The use of this class has faded from its peak in the first half of the 20th century as the roles and weaponry of small combatants have evolved (in conjunction with technological advances in

propulsion Propulsion is the generation of force by any combination of pushing or pulling to modify the translational motion of an object, which is typically a rigid body (or an articulated rigid body) but may also concern a fluid. The term is derived from ...

reliability and efficiency).

Background

As the

industrial revolution The Industrial Revolution was the transition to new manufacturing processes in Great Britain, continental Europe, and the United States, that occurred during the period from around 1760 to about 1820–1840. This transition included going f ...

progressed, steam-powered steel ships replaced sail-powered wooden ships; but

naval artillery Naval artillery is artillery mounted on a warship, originally used only for naval warfare and then subsequently used for naval gunfire support, shore bombardment and anti-aircraft roles. The term generally refers to tube-launched projectile-firi ...

remained the preferred weapon. The first large warship to be sunk by a

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. Historically, su ...

was the

Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...

an ironclad in 1891. As major naval powers realized the vulnerability of their expensive

battleship A battleship is a large armored warship with a main battery consisting of large caliber guns. It dominated naval warfare in the late 19th and early 20th centuries. The term ''battleship'' came into use in the late 1880s to describe a type of ...

s to inexpensive

torpedo boat A torpedo boat is a relatively small and fast naval ship designed to carry torpedoes into battle. The first designs were steam-powered craft dedicated to ramming enemy ships with explosive spar torpedoes. Later evolutions launched variants of se ...

s, they started building defensive flotillas of torpedo boat destroyers or

s for short.Potter & Nimitz, p.335 The earliest torpedo boat destroyers were small, to maximize maneuverability, and powered by large steam engines, to maximize speed to intercept enemy torpedo boats before they could get close to the battleships. These torpedo boat destroyers were so full of machinery, coal,

quick-firing gun A quick-firing or rapid-firing gun is an artillery piece, typically a gun or howitzer, which has several characteristics which taken together mean the weapon can fire at a fast rate. Quick-firing was introduced worldwide in the 1880s and 1890s an ...

s and ammunition that there was not enough room for living quarters for their crew. Destroyer tenders with berthing and dining accommodations for the destroyer crews joined the fleet train of colliers accompanying the battle fleet. The destroyer tenders also carried cooks, administrative and medical personnel, and senior ratings qualified to repair the destroyer machinery. Although individual destroyers were too small for these specialized personnel, the skills of those aboard the tender were available to the whole destroyer flotilla. The tender also carried a supply of spare parts for destroyer machinery.Potter & Nimitz p.640

Evolution

When the Great White Fleet circled the globe in 1907, it was accompanied by a tender, , and a

repair ship A repair ship is a naval auxiliary ship designed to provide maintenance support to warships. Repair ships provide similar services to destroyer, submarine and seaplane tenders or depot ships, but may offer a broader range of repair capability incl ...

, . Repair ships did not offer the personnel services of a tender, but offered a broader range of repair capability, including equipment and personnel for repair of more significant machinery failures or battle damage.Lenton & Colledge, p.333 Repair ships carried a fully equipped machine shop and

foundry A foundry is a factory that produces metal castings. Metals are cast into shapes by melting them into a liquid, pouring the metal into a mold, and removing the mold material after the metal has solidified as it cools. The most common metals pr ...

capable of completing any repair not requiring a

drydock A dry dock (sometimes drydock or dry-dock) is a narrow basin or vessel that can be flooded to allow a load to be floated in, then drained to allow that load to come to rest on a dry platform. Dry docks are used for the construction, maintenance, ...

. Destroyer displacement had increased to 1,000 tons by

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

and to 2,000 tons for destroyers accompanying the

Fast Carrier Task Force The Fast Carrier Task Force (TF 38 when assigned to Third Fleet, TF 58 when assigned to Fifth Fleet), was the main striking force of the United States Navy in the Pacific War from January 1944 through the end of the war in August 1945. The task ...

s of

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

. United States destroyer tenders of World War II carried some destroyer ammunition and

depth charge A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive Shock factor, hydraulic shock. Most depth ...

s, and performed torpedo maintenance and resupply, but focused on repair work. The had a foundry,

forge A forge is a type of hearth used for heating metals, or the workplace (smithy) where such a hearth is located. The forge is used by the smith to heat a piece of metal to a temperature at which it becomes easier to shape by forging, or to th ...

, metal lathes, and welders for heavy repairs, plus an

optical Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultravio ...

shop and

clockmaker A clockmaker is an artisan who makes and/or repairs clocks. Since almost all clocks are now factory-made, most modern clockmakers only repair clocks. Modern clockmakers may be employed by jewellers, antique shops, and places devoted strictly to ...

s to repair

binoculars Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects. Most binoculars are sized to be held ...

sextant A sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary use of a sextant is to measure the angle between an astronomical object and the horizon for the purposes of celes ...

marine chronometer A marine chronometer is a precision timepiece that is carried on a ship and employed in the determination of the ship's position by celestial navigation. It is used to determine longitude by comparing Greenwich Mean Time (GMT), or in the modern ...

s, optical rangefinders, and

fire-control system A fire-control system (FCS) is a number of components working together, usually a gun data computer, a director, and radar, which is designed to assist a ranged weapon system to target, track, and hit a target. It performs the same task as a ...

computers A computer is a machine that can be programmed to carry out sequences of arithmetic or logical operations (computation) automatically. Modern digital electronic computers can perform generic sets of operations known as programs. These programs ...

. These tenders operated

still A still is an apparatus used to distill liquid mixtures by heating to selectively boil and then cooling to condense the vapor. A still uses the same concepts as a basic distillation apparatus, but on a much larger scale. Stills have been use ...

s and electric generators to supply fresh water and electrical power to destroyers moored alongside for

boiler A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, centr ...

repair. Each increment of size enabled destroyers to carry more of the personnel and equipment previously found on the tender. Destroyers reached the size of

cruiser A cruiser is a type of warship. Modern cruisers are generally the largest ships in a fleet after aircraft carriers and amphibious assault ships, and can usually perform several roles. The term "cruiser", which has been in use for several hu ...

s during the

Cold War The Cold War is a term commonly used to refer to a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. The term '' cold war'' is used because the ...

, and with that size acquired a cruiser's capability for independent action. Surviving tenders became functionally indistinguishable from repair ships.Cooney, pp.6&13 Some destroyer tenders were designed and built to attend a flotilla of destroyers, while others were converted from ships built for other purposes. Tabled below is a comparison of ships designed as destroyer tenders:

Notes

Sources

* * * * * * {{Warship types of the 19th & 20th centuries Ship types Auxiliary depot ship classes

Background

Evolution

See also

Notes

Sources