The ''Nitro''-class

ammunition ship An ammunition ship is an auxiliary ship specially configured to carry ammunition, usually for naval ships and aircraft. An ammunition ship's cargo handling systems, designed with extreme safety in mind, include ammunition hoists with airlocks bet ...

s are a class of three

auxiliary vessel 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 ...

s of the

United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...

. Launched in 1958-1959, they were among the first specialized

underway replenishment Replenishment at sea (RAS) (North Atlantic Treaty Organization/Commonwealth of Nations) or underway replenishment (UNREP) (U.S. Navy) is a method of transferring fuel, munitions, and stores from one ship to another while under way. First develope ...

ships built after the Second World War, to carry munitions. These and the s are sometimes considered to form a single class. A fourth ship of the class was planned under the 1959 military construction program but was eventually cancelled before construction began. Soon after completion, all ships of the class were modified to stow surface to air missiles as large as the RIM-8 Talos in their holds. Initially ships of the ''Nitro'' class were armed with eight

3"/50 caliber gun The 3"/50 caliber gun (spoken "three-inch fifty-caliber") in United States naval gun terminology indicates the gun fired a projectile in diameter, and the barrel was 50 calibers long (barrel length is 3 in × 50 = ). Different guns (identifi ...

s in Mk 33 twin mounts. Two Mk 33 mounts were located on the forecastle and another two were located near the stern. During the mid-1960s all ships of the class had the two Mk 33 mounts near the stern replaced with a

helicopter A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. These attributes ...

landing pad. This allowed each ship to utilize helicopters during replenishment operations. The ''Nitro''s were decommissioned in 1993-1995 following the end of 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 have been scrapped.

Ships in class

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Notes

Nitro class ammunition ship {{US-navy-stub