Henry J. Kaiser-class replenishment oiler

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USNS Big Horn (T-AO-198)
Class overview
Name	Henry J. Kaiser class
Builders	Avondale Shipyard, Inc., New Orleans, Louisiana (16 ships) Pennsylvania Shipbuilding Company, Philadelphia, Pennsylvania, and Tampa Shipyards, Inc., Tampa, Florida (2 ships; neither completed)
Preceded by	Cimarron class
Succeeded by	John Lewis class
Built	August 1984-May 1996
In service	December 1986-present
Planned	18
Completed	16
Cancelled	2 (Ship hulls scrapped in 2011)
Active	14 US, 1 Chile as of 1 March 2011
Laid up	1
Retired	0
General characteristics
Type	Fleet replenishment oiler
Tonnage	31,200 DWT
Displacement	All ships: 9,500 tons light Patuxent, Laramie, and Rappahannock: 42,000 long tons (42,674 metric tons) full load All other ships: Variously reported as 40,700 long tons (41,353 metric tons) and as 42,382 tons full load
Length	677 ft (206.3 m)
Beam	97 ft 5 in (29.7 m)
Draft	35 ft (10.7 m) maximum
Installed power	16,000 hp (12,000 kW) per shaft 34,442 hp (25,683 kW) total sustained
Propulsion	Two medium-speed Colt-Pielstick PC4-2/2 10V-570 diesel engines, two shafts, controllable pitch propellers
Speed	20 knots (37 km/h)
Capacity	Patuxent, Laramie, and Rappahannock: 159,000 bbl (25,300 m3) of fuel oil and jet fuel Other ships:178,000 to 180,000 bbl (28,300 to 28,600 m3) of fuel oil and jet fuel All ships: 7,400 sq ft (690 m2) of dry cargo space; eight 20 ft (6.1 m) refrigerated containers with room for 128 pallets
Complement	66 to 89 civilian personnel and 7 to 24 U.S. Navy personnel
Sensors and processing systems	2 x AN/SPS-59 LN-66 surface search radars
Electronic warfare & decoys	AN/SLQ-25 Nixie Torpedo Countermeasures[1]
Armament	Multiple .50 caliber machine guns Space, weight, and power reservations for 2 Phalanx Close-In Weapons Systems[2]
Aviation facilities	Helicopter landing platform
Notes	5 refueling stations 2 dry cargo transfer rigs

The Henry J. Kaiser class is an American class of eighteen fleet replenishment oilers which began construction in August 1984. The class comprises fifteen oilers which are operated by Military Sealift Command to provide underway replenishment of fuel to United States Navy combat ships and jet fuel for aircraft aboard aircraft carriers at sea.^[3]

Twelve of the Kaisers are not double-hulled like most modern tankers. The class will be replaced by the John Lewis-class replenishment oiler.^[4]

One ship, operated by the United States from 1987 to 1996, was sold to Chile in 2009 and commissioned into the Chilean Navy in 2010. Two ships were scrapped in 2011 while still incomplete.