Henry J. Kaiser-class replenishment oiler

Class of replenishment oiler craft

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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, cp 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[2]
Armament|

* Multiple .50 caliber machine guns
* Space, weight, and power reservations for 2 Phalanx Close-In Weapons Systems[1]

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 under the TAO(X) project which will build 20 double-hulled ships, starting with USNS John Lewis and USNS Harvey Milk.[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.

## Technical overview[edit]

There are stations on both sides of each ship for underway replenishment of fuel and stores. The ships in this class have a small capacity to carry and transfer fresh and frozen foods as well as other materials, and have two dry cargo transfer rigs.

Patuxent, Laramie, and Rappahannock differ from the other 15 ships, in having double hulls to meet the requirements of the Oil Pollution Act of 1990. Hull separation is 6 feet (1.8 m) at the sides and 6 feet 6 inches (1.98 m) on the bottom. This resulted in a 12% reduction in cargo capacity.

## Construction program[edit]

The circumstances of the construction program were convoluted and it is worthwhile to spell them out here. The original contract, for T-AO 187, was awarded to Avondale Industries, (Avondale), in November 1982. This contract included options for T-AOs 188, 189 and 190, which were exercised in January 1983, (T-AO 188) and November 1983, (T-AOs 189 and 190). A second-source contract, for T-AOs 191 and 192, was awarded to Pennsylvania Shipbuilding Company, (Penn Ship), in May 1985.

This contract included options for T-AOs 194 and 196, which were never exercised. After Penn Ship began to have cash flow problems, the Navy transferred these options from Penn Ship's contract to Avondale's contract and exercised them in June 1988. Additional options on Avondale's contract were executed in June 1985 for T-AO 193, in February 1986 for T-AO 195, in February 1987 for T-AO 197, in June 1988 for T-AO 198, in October 1988 for T-AOs 200, 202 and 204, and in March 1989 for T-AOs 199, 201 and 203.

The Navy's contract with Penn Ship for T-AOs 191 and 192 was terminated before the ships were complete. A new contract was executed with Tampa Shipyards, Inc., of Tampa FL, a division of the American Ship Building Company. This company should not be confused with Tampa Shipbuilding Company, (TASCO), which was a totally different entity, at a different location, long gone by 1989.

Disputes over corrective construction and materials costs between the U.S. Navy and Tampa Shipyards resulted in termination of this contract in 1993, when T-AO 191 was said to be 95% complete and T-AO 192 84% complete. The Navy then determined that the ships were no longer needed as oilers, and undertook a study of the feasibility of converting them to ammunition ships. This study concluded that such a conversion was cost-prohibitive and the ships were placed in long-term storage in an incomplete condition. They were sold for recycling in 2011.

## Naming[edit]

The class is named for its lead unit, Henry J. Kaiser, which is named for the American industrialist and shipbuilder Henry J. Kaiser (1882–1967). The first nine ships were named for American shipbuilders, inventors, naval architects, and aeronautical engineers who played important roles in the history of the U.S. Navy. The tenth to eighteenth ships were named after American rivers, which is a more traditional naming convention for U.S. Navy oilers.

## Operations[edit]

In U.S. Navy service, the ships serve in a non-commissioned status in the Military Sealift Command, with primarily civilian crews, and as such, they are prefixed as "USNS" instead of "USS", as commissioned ships are. After joining the fleet, the 16 completed ships all saw active service between 1986 and 1996, when Andrew J. Higgins became the first unit of the class to be laid up. Since then, some of the others have also spent periods out of service in reserve or in a limited operational status.

## Foreign transfer[edit]

Andrew J. Higgins never re-entered U.S. service after being laid up in 1996. She was sold to Chile in 2009 and was commissioned into the Chilean Navy in 2010 as Almirante Montt.

## Ships[edit]

Photo | Ship | Hull No. | Status | Years Active | NVR
Page

|
|
|
|
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| Henry J. Kaiser | T-AO-187 | Active - Proposed decommission 2027[5] | 1986–present | AO187
| Joshua Humphreys | T-AO-188 | Active - Proposed decommission 2026[5] | 1987-1996; 2005-2006; 2010-present | AO188
| John Lenthall | T-AO-189 | Active - Proposed decommission 2023[5] | 1987-1996; 1998–present | AO189
| Andrew J. Higgins | T-AO-190 | Inactivated May 1996. Sold to the Chilean Navy May 2009. Towed to Atlantic Marine Alabama shipyard, Mobile, Alabama, September 2009 for three-month refit. Commissioned in Chilean Navy on 10 February 2010 and renamed Almirante Montt.[1] | 1987-1996 (USA); 2010–present (Chile)  | AO190
| Benjamin Isherwood | T-AO-191 | Cancelled when 95.3% complete,
transferred to the Maritime Administration,
laid up in the James River Reserve Fleet,
scrapped in 2011 | Launched 1988, christened 1991, never in service | AO191
| Henry Eckford | T-AO-192 | Cancelled when 84% complete,
transferred to the Maritime Administration,
laid up in the James River Reserve Fleet,
scrapped in 2011 | Launched 1989, never in service  | AO192
| Walter S. Diehl | T-AO-193 | Decommissioned 1 October 2022[6] | 1988–2022 | AO193
| John Ericsson | T-AO-194 | Active - Proposed decommission 2026[5] | 1991–present | AO194
| Leroy Grumman | T-AO-195 | Active - Proposed decommission 2025[5] | 1989–present | AO195
| Kanawha | T-AO-196 | Active | 1991–present | AO196
| Pecos | T-AO-197 | Active - Proposed decommission 2026[5] | 1990–present | AO197
| Big Horn | T-AO-198 | Active | 1992–present | AO198
| Tippecanoe | T-AO-199 | Active | 1993–present | AO199
| Guadalupe | T-AO-200 | Active | 1992–present | AO200
| Patuxent | T-AO-201 | Active | 1995–present | AO201
| Yukon | T-AO-202 | Active | 1994–present | AO202
| Laramie | T-AO-203 | Active | 1996–present | AO203
| Rappahannock | T-AO-204 | Active | 1995–present | AO204

## References[edit]

1. ^ "T-AO-187 Kaiser Class - Archived 7/99". www.forecastinternational.com. Retrieved 19 October 2017. "The electronics consist of two LN-66 radar units, a commercial fathometer and an SLQ-25 NIXIE torpedo decoy. They have space and weight reserved to mount two Mark 15 Phalanx close-in weapons systems when required."
2. ^ "SLQ-25A/B (NIXIE) - Archive 7/2005". www.forecastinternational.com. Retrieved 19 October 2017.
3. ^ "FLEET REPLENISHMENT OILERS - T-AO". www.navy.mil. US Navy. Retrieved 19 October 2017.
4. ^ Ronald O'Rourke. "Navy John Lewis (TAO-205) Class Oiler Shipbuilding Program: Background and Issues for Congress" (PDF). fas.org. Retrieved 19 October 2017.
5. ^ a b c d e f "Report to Congress on the Annual Long-Range Plan for Construction of Naval Vessels" (PDF). media.defense.gov. 20 April 2022. Retrieved 6 October 2022.
6. ^ "Walter S. Diehl". nvr.navy.mil. 7 October 2022. Retrieved 2 November 2022.

## External links[edit]

Wikimedia Commons has media related to Henry J. Kaiser class oilers.

* v
* t
* e

Henry J. Kaiser-class replenishment oilers

United States Navy|

| Completed|

* Henry J. Kaiser
* Joshua Humphreys
* John Lenthall
* Andrew J. Higgins
* Walter S. Diehl
* John Ericsson
* Leroy Grumman
* Kanawha
* Pecos
* Big Horn
* Tippecanoe
* Guadalupe
* Patuxent
* Yukon
* Laramie
* Rappahannock

|

Canceled|

* Benjamin Isherwood
* Henry Eckford

Chilean Navy|

* Almirante Montt (ex-Andrew J. Higgins)

* List of auxiliaries of the United States Navy

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