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An auxiliary ship is a
naval ship A naval ship (or naval vessel) is a military ship (or sometimes boat, depending on classification) that is used by a navy. Naval ships are differentiated from civilian ships by construction and purpose. Generally, naval ships are damage resili ...
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. Auxiliary ships are extremely important for
navies A navy, naval force, military maritime fleet, war navy, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operation ...
of all sizes because if they were not present the primary fleet vessels would be unsupported. Thus, virtually every navy maintains an extensive fleet of auxiliary ships, however, the composition and size of these auxiliary fleets vary depending on the nature of each navy and its primary mission. Smaller coastal
navies A navy, naval force, military maritime fleet, war navy, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operation ...
tend to have smaller auxiliary vessels focusing primarily on littoral and training support roles, while larger blue-water navies tend to have larger auxiliary fleets comprising longer-range fleet support vessels designed to provide support far beyond
territorial waters Territorial waters are informally an area of water where a sovereign state has jurisdiction, including internal waters, the territorial sea, the contiguous zone, the exclusive economic zone, and potentially the extended continental shelf ( ...
.


Roles


Replenishment

One of the most direct ways that auxiliary ships support the fleet is by providing
underway replenishment Underway replenishment (UNREP) (United States Navy, U.S. Navy) or replenishment at sea (RAS) (North Atlantic Treaty Organization/Commonwealth of Nations) is a method of transferring fuel, munitions, and stores from one ship to another while unde ...
(also known as "replenishment at sea") to major fleet units. This allows the fleet to remain in the same location, with the replenishment vessels bringing up fuel,
ammunition Ammunition, also known as ammo, is the material fired, scattered, dropped, or detonated from any weapon or weapon system. The term includes both expendable weapons (e.g., bombs, missiles, grenades, land mines), and the component parts of oth ...
, food, and supplies from
shore A coast (coastline, shoreline, seashore) is the land next to the sea or the line that forms the boundary between the land and the ocean or a lake. Coasts are influenced by the topography of the surrounding landscape and by aquatic erosion, su ...
to the fleet wherever it is operating. Oilers ("replenishment tankers") are vessels specifically designed to bring fuel oil to the fleet, while the earlier Colliers supplied coal-burning
steamship A steamship, often referred to as a steamer, is a type of steam-powered vessel, typically ocean-faring and seaworthy, that is propelled by one or more steam engines that typically move (turn) propellers or paddlewheels. The first steamships ...
s. Specific role replenishment vessels include combat stores ships, depot ships, general stores issue ships, and ammunition ships. Tenders are specifically designed to support a type of smaller naval unit, like
submarine A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...
s,
destroyers 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 conceived i ...
, and
seaplane A seaplane is a powered fixed-wing aircraft capable of takeoff, taking off and water landing, landing (alighting) on water.Gunston, "The Cambridge Aerospace Dictionary", 2009. Seaplanes are usually divided into two categories based on their tech ...
s, providing a mobile base of operations for these units: specifically
destroyer tender A destroyer tender or destroyer depot ship is a type of depot ship: an auxiliary ship designed to provide maintenance support to a flotilla of destroyers or other small warships. The use of this class has faded from its peak in the first half of ...
s,
submarine tender A submarine tender, in British English a submarine depot ship, is a type of depot ship that supplies and supports submarines. Development Submarines are small compared to most oceangoing vessels, and generally cannot carry large amounts of foo ...
s,
seaplane tender A seaplane tender is a boat or ship that supports the operation of seaplanes. Some of these vessels, known as seaplane carriers, could not only carry seaplanes but also provided all the facilities needed for their operation; these ships are rega ...
s, torpedo boat tenders.


Transport

Supporting front-line operating bases requires immense transportation capacity. Transport ships are often converted
merchant ship A merchant ship, merchant vessel, trading vessel, or merchantman is a watercraft that transports cargo or carries passengers for hire. This is in contrast to pleasure craft, which are used for personal recreation, and naval ships, which are ...
s simply commissioned (APA, APD, APH, APV) into naval service. Tankers are transports specifically designed to ship fuel to forward locations. Transport ships are often employed not only carrying cargo for naval support but are in support of all forces of a nation's military (AK, AKA, AKN, AKR, AKS). In particular,
troopship A troopship (also troop ship or troop transport or trooper) is a ship used to carry soldiers, either in peacetime or wartime. Troopships were often drafted from commercial shipping fleets, and were unable to land troops directly on shore, typic ...
s and
attack transport Attack transport is a United States Navy ship classification for a variant of ocean-going troopship adapted to transporting invasion forces ashore. Unlike standard troopships – often drafted from the Merchant navy, merchant fleet &ndash ...
s are used to carry a large number of soldiers to operational theatres. Some transport ships are highly specialized, like the ammunition ships employed by the US Navy. Large ocean tugs (AT, ATO, ATF, ATA, ATR) are used to tow large auxiliary ships, like barges, floating repair docks, and floating cranes in the open sea, also disabled ships.


Repair

Repairing ships at sea or in conflict areas is important as it allows these vessels to return to service more quickly, while also increasing the chance of survival for ships critically damaged in battle. Repair vessels (US Navy: AR, ARB, ARC, ARG, ARH, ARL, ARV) range from small equipment ships known as Auxiliary repair docks, to the larger Auxiliary floating drydocks, there are also Aircraft repair ships that specialize in repair of naval aircraft.


Harbor

Harbor support is a critical support role, with various types of vessels including
tugboat A tugboat or tug is a marine vessel that manoeuvres other vessels by pushing or pulling them, with direct contact or a tow line. These boats typically tug ships in circumstances where they cannot or should not move under their own power, suc ...
s,
barge A barge is typically a flat-bottomed boat, flat-bottomed vessel which does not have its own means of mechanical propulsion. Original use was on inland waterways, while modern use is on both inland and ocean, marine water environments. The firs ...
s, lighter barges, derrick-crane vessels, and others used to move ships and equipment around the port facilities, and
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 an ...
s and tends to service ships currently in the harbor. These vessels also help maintain the harbor by dredging channels, maintaining
jetties A jetty is a man-made structure that protrudes from land out into water. A jetty may serve as a breakwater, as a walkway, or both; or, in pairs, as a means of constricting a channel. The term derives from the French word ', "thrown", signif ...
and
buoy A buoy (; ) is a buoyancy, floating device that can have many purposes. It can be anchored (stationary) or allowed to drift with ocean currents. History The ultimate origin of buoys is unknown, but by 1295 a seaman's manual referred to navig ...
s, and even providing floating platforms for port defenses. In US Navy, tugboats are type YT, YTB, YTM, YTL or a Type V ship. and barges are classified as a
Type B ship The Type B ship is a United States Maritime Administration (MARAD) designation for World War II barges. Barges are very low cost to build, operate, and move, and can transport bulky cargo. Because barges lack engines for self-propulsion, they are ...
or YF, YFN, YFR, or YFRN.


Support

Radar picket A radar picket is a radar-equipped station, ship, submarine, aircraft, or vehicle used to increase the radar detection range around a nation or military (including naval) force to protect it from surprise attack, typically air attack, or from c ...
to increase the radar detection range around a force. Communications Relay Ships (AGMR) are floating communications stations. Tracking ships or Range Instrumentation Ships (AGM) are equipped with antennas and electronics to support the launching and tracking of missiles and rockets.
Command ship Command ships serve as the flagships of the commander of a fleet. They provide communications, office space, and accommodations for a fleet commander and their staff, and serve to coordinate fleet activities. An auxiliary command ship feature ...
(AGF) are flagships of the commander of a fleet. Wind-class icebreaker (AGB WAGB) are support ships.
Rescue and salvage ship Rescue and salvage ships (hull classification symbol ARS) are a type of military salvage tug. They are tasked with coming to the aid of stricken vessels. Their general mission capabilities include combat salvage, lifting, towing, retraction of grou ...
and
Submarine rescue ship A submarine rescue ship is a surface support ship for submarine rescue and deep-sea salvage operations. Methods employed include the McCann Rescue Chamber, deep-submergence rescue vehicles (DSRV's) and diving operations. List of active su ...
(ASR) for surface support ship for ship and submarine rescue. Barracks ships or Auxiliary Personal Living ships, (APL) are vessels-barges for service men to live on.


Research

A wide variety of vessels are employed as Technical Research Ships(AGTR), Tracking Ships(AGM), Environmental Research Ships (AGER), Hydrofoil Research Ships (AGEH), and Survey Vessels, primarily to provide a navy with a better understanding of its operating environment or to assist in testing new technologies for employment in other vessels.


Hospital

Hospital ship A hospital ship is a ship designated for primary function as a floating healthcare, medical treatment facility or hospital. Most are operated by the military forces (mostly navy, navies) of various countries, as they are intended to be used in or ...
s are able to provide medical care in remote locations to personnel.


Unclassified auxiliary ship

The
US Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...
also used an unclassified miscellaneous auxiliary ship classification in which the unclassified miscellaneous auxiliary ship classification is ''IX''. An unclassified miscellaneous auxiliary ship can be a new ship without a classified role or a ship that does not fit into a standard category or a ship that had been removed from its classification.Unclassified (IX): Special Types
'shipscribe.com''


See also

*
List of auxiliaries of the United States Navy This is a list of Auxiliary ship, auxiliaries of the United States Navy. It covers the various types of ships that support the frontline combat vessels of the United States Navy. Auxiliary ships which function as hospital ships and as oilers a ...
* List of auxiliary ship classes in service *
Service Squadron A Service Squadron (ServRon) was a United States Navy squadron that supported fleet combat ships and US Navy Auxiliary ships. Service Squadrons were used by the US Navy from their inception in 1943 to as late as the early 1980s. At the time of t ...
*
US Naval Advance Bases US Naval Advance Bases were built globally by the United States Navy during World War 2, World War II to support and project U.S. naval operations worldwide. A few were built on Allies of World War II, Allied soil, but most were captured enemy fa ...


References


Notes


Bibliography

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External links

* {{DEFAULTSORT:Auxiliary Ship Ship types