Replenishment oiler

The replenishment oiler HMAS Sirius (right) providing fuel to the amphibious warfare ship USS Juneau while both are underway

A replenishment oiler is a naval auxiliary ship with fuel tanks and dry cargo holds, which can conduct underway replenishment on the high seas. Several countries have used replenishment oilers.

The US Navy hull classification symbol for this type of ship was AOR. Replenishment oilers are slower and carry fewer dry stores than the US Navy's fast combat support ships (AOEs).

History

The development of the oiler paralleled the change from coal- to oil-fired boilers in warships. Prior to the adoption of oil fired machinery, navies could extend the range of their ships either by maintaining coaling stations or for warships to raft together with colliers and for coal to be manhandled aboard. Though arguments related to fuel security were made against such a change, the ease with which liquid fuel could be transferred led in part to its adoption by navies worldwide.

The forerunner of the modern replenishment oiler was a Kriegsmarine (German navy) ship, the Dithmarschen, which was built in 1938. The Dithmarschen was designed to provide both fuel and stores (including munitions) to the German fleet. After World War II she was claimed by the United States as a war prize and commissioned into the United States Navy as the USS Conecuh (AOR-110). The ship proved the feasibility and flexibility of this sort of vessel in supporting task forces at sea.

The fast combat support ship (AOE) was developed first by the United States Navy as a logistics support vessel for aircraft carrier task forces, but the resulting vessel, while capable of high speed and of maintaining station as a component in the task force, was at the time the most expensive auxiliary ship ever procured by the United States Navy. For other applications not requiring high speed, such as anti-submarine groups, a smaller, less capable but much less expensive variant was desirable. This variant was the Wichita-class AOR.

Characteristics

A replenishment oiler at work

For smaller navies, such as the Royal New Zealand Navy, replenishment oilers are typically one of the largest ships in the navy. Such ships are designed to carry large amounts of fuel and dry stores for the support of naval operations far away from port. Replenishment oilers are also equipped with more extensive medical and dental facilities than smaller ships can provide.

Such ships are equipped with multiple refueling gantries to refuel and resupply multiple ships at a time. The process of refueling and supplying ships at sea is called underway replenishment. Furthermore, such ships often are designed with helicopter decks and hangars. This allows the operation of rotary-wing aircraft, which allows the resupply of ships by helicopter. This process is called vertical replenishment. Furthermore, such ships, when operating in concert with surface groups, can act as the aviation maintenance platform where helicopters receive more extensive maintenance than can be provided by the smaller hangars of the escorting ships.

Their size, additional facilities, and ability to support the operation of other vessels, means that replenishment oilers have been used as command ships, with some ships, such as the French Durance-class, this capability being built into the vessels from the start.

Armament

Because the replenishment oiler is not a combat unit, but rather a support vessel, such ships are often lightly armed, usually with self-defense systems (such as the Phalanx CIWS close-in weapons systems), small arms, machine guns and/or light automatic cannons. They may also carry man-portable air-defense systems for additional air defense capability.

Examples

Replenishment oilers include:

The Canadian Navy (sJoint Support Ship Project) and the Spanish Navy^[1] are actively designing and building replenishment oilers.

References

↑ "Petrolero de Flota 'Marqués de la Ensenada' - Surface Ships". armada.mde.es. Armada Española. 2011. Retrieved May 4, 2011.

External links

Wikimedia Commons has media related to Oilers.

Modern naval ships and warships

List of naval ship classes in service submarine auxiliary

Aircraft carriers	Aircraft cruiser Amphibious assault ship Anti-submarine warfare carrier Balloon carrier CAM ship Escort carrier Fighter catapult ship Fleet carrier Helicopter carrier Light aircraft carrier Merchant aircraft carrier Seaplane tender Submarine aircraft carrier Supercarrier

Battleships	Coastal defence ship Dreadnought Fast battleship Pre-dreadnought battleship Super-dreadnought (Standard-type battleship) Treaty battleship

Cruisers	Armored cruiser Battlecruiser Flight deck cruiser Heavy cruiser Pocket battleship Light cruiser Merchant raider Protected cruiser Strike cruiser Unprotected cruiser

Escort	Aviso Convoy rescue ship Destroyer Destroyer escort Destroyer leader Frigate Guided missile destroyer Kaibōkan Sloop

Transport	Amphibious transport dock Amphibious warfare ship Attack transport Dock landing ship Landing craft Landing craft carrier Landing Craft Support Landing Ship Heavy Landing ship, infantry Landing Ship Medium Landing Ship, Tank Landing Ship Vehicle Troopship

Patrol craft	Armed boarding steamer Armed yacht Coastal Motor Boat Corvette Gunboat Harbour Defence Motor Launch Motor Launch Naval drifter Naval trawler Ocean boarding vessel Patrol boat Q-ship Steam Gun Boat Submarine chaser Torpedo boat

Fast attack craft	E-boat MAS MGB Missile boat MTB MTM MTSM PT boat Shin'yō

Mine warfare	Danlayer Destroyer minesweeper Mine countermeasures vessel Mine planter Minehunter Minelayer Minesweeper

Command and support	Amenities ship Ammunition ship Auxiliary repair dock Auxiliary ship Collier Combat stores ship Command ship Crane vessel Depot ship Destroyer tender Dispatch boat Fast combat support ship General stores issue ship Hospital ship Naval tugboat Net laying ship Repair ship Replenishment oiler Submarine tender

Submarines	Attack submarine Ballistic missile submarine Coastal submarine Cruise missile submarine Cruiser submarine Deep-submergence vehicle DSRV Fleet submarine Midget submarine U-boat

Miscellaneous	Arsenal ship Barracks ship Breastwork monitor Flagship Guard ship Littoral combat ship Monitor River monitor Training ship

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