Cimarron class Support Ship

The Cimarron class of fleet oilers (AO) was introduced in the early 1980s but their design proved to be too small to satisfy the Navy needs so the ships were cut into two sections and a third about 35.7 m long was added in order to increase the fuel load. Further ten planned ships were cancelled and the more capable Henry J. Kaiser class was build instead

Derivatives / Succeeded by
1986	Henry J. Kaiser class

Specifications

135

crew

37000

full load (tn)

210

length (m)

beam (m)

9.80

draught (m)

max speed (knots)

24000

power (shp)

Naval Engine boilers

Naval Engine steam turbines

Close-In Weapon System CIWS Phalanx 20 mm

Aircraft

		Typical	Max
Landing platform only. No hangar
US Navy	B-V 107M H-46 Sea Knight	0	1

Shipyards

Avondale Shipyard -

List of Ships

Filter: Hide Transfers Hide derivatives

--	--		US Navy	T-AO-191	Henry J. Kaiser class USNS Benjamin Isherwood
--	--		US Navy	T-AO-192	Henry J. Kaiser class USNS Henry Eckford
1981	1998		US Navy	AO 177	USS Cimarron
1981	1999		US Navy	AO 178	USS Monongahela
1981	1998		US Navy	AO 179	USS Merrimack
1982	1999		US Navy	AO 180	USS Willamette
1983	1999		US Navy	AO 186	USS Platte
1986	--		US Navy	T-AO-187	Henry J. Kaiser class USNS Henry J. Kaiser	NHJK
1987	--		US Navy	T-AO-188	Henry J. Kaiser class USNS Joshua Humphreys	NHJH
1987	--		US Navy	T-AO-189	Henry J. Kaiser class USNS John Lenthall	NJLN
1987	1996		US Navy	T-AO-190	Henry J. Kaiser class USNS Andrew J. Higgins	NAJH
2010	--	Chilean Navy AO-52 Almirante Montt
1988	--		US Navy	T-AO-193	Henry J. Kaiser class USNS Walter S. Diehl	NWSD
1989	--		US Navy	T-AO-195	Henry J. Kaiser class USNS Leroy Grumman	NNLG
1990	--		US Navy	T-AO-197	Henry J. Kaiser class USNS Pecos	NPEC
1991	--		US Navy	T-AO-194	Henry J. Kaiser class USNS John Ericsson	NNJE
1991	--		US Navy	T-AO-196	Henry J. Kaiser class USNS Kanawha	NPTD
1992	--		US Navy	T-AO-198	Henry J. Kaiser class USNS Big Horn	NBIG
1992	--		US Navy	T-AO-200	Henry J. Kaiser class USNS Guadalupe	NLUP
1993	--		US Navy	T-AO-199	Henry J. Kaiser class USNS Tippecanoe	NTIP
1994	--		US Navy	T-AO-202	Henry J. Kaiser class USNS Yukon	NYUK
1995	--		US Navy	T-AO-201	Henry J. Kaiser class USNS Patuxent	NPCZ
1995	--		US Navy	T-AO-204	Henry J. Kaiser class USNS Rappahannock	NRAP
1996	--		US Navy	T-AO-203	Henry J. Kaiser class USNS Laramie	NLAR

23 units

Events

1976-aug-09	Ordered	Ordered AO 177 USS Cimarron
1976-aug-09	Ordered	Ordered AO 178 USS Monongahela
1977-jun-25	Ordered	Ordered AO 179 USS Merrimack
1978-apr-11	Ordered	Ordered AO 180 USS Willamette
1978-apr-11	Ordered	Ordered AO 186 USS Platte
1978-may-18	Laid down	Laid down AO 177 USS Cimarron
1979-apr-28	Launched	Launched AO 177 USS Cimarron
1979-jul-16	Laid down	Laid down AO 179 USS Merrimack
1980-may-17	Launched	Launched AO 179 USS Merrimack
1980-aug-04	Laid down	Laid down AO 180 USS Willamette
1981-jan-10	Commissioned	Commissioned AO 177 USS Cimarron
1981-feb-02	Laid down	Laid down AO 186 USS Platte
1981-jul-18	Launched	Launched AO 180 USS Willamette
1981-sep-05	Commissioned	Commissioned AO 178 USS Monongahela
1981-nov-14	Commissioned	Commissioned AO 179 USS Merrimack
1982-jan-30	Launched	Launched AO 186 USS Platte
1982-dec-18	Commissioned	Commissioned AO 180 USS Willamette
1983-jan-27	Commissioned	Commissioned AO 186 USS Platte
1983-dec-20	Aircraft	Aircraft AO 179 USS Merrimack CH-46 156423 accident off Beirut
1985-jan-15		AO 180 USS Willamette First WestPAC by the Willamette departure date was 15Jan85. Ports visited were Guam, the Philipines, Hong Kong, Sasebo Japan, Kagoshima Japan, Shimoda Japan, and Yokuska Japan.
1995-jun-29		AO 180 USS Willamette Being moored at Pearl Harbour suffered a boiler explosion
1998-dec-15	Decommissioned	Decommissioned AO 177 USS Cimarron
1998-dec-18	Decommissioned	Decommissioned AO 179 USS Merrimack to National Defense Reserve Fleet
1999-apr-30	Decommissioned	Decommissioned AO 180 USS Willamette to Naval Defense Reserve Fleet
1999-may-03	Struck	Struck AO 177 USS Cimarron to National Defense Reserve Fleet
1999-jun-30	Decommissioned	Decommissioned AO 178 USS Monongahela
1999-jun-30	Decommissioned	Decommissioned AO 186 USS Platte to Naval Defense Reserve Fleet

1981

Cimarron class

Specifications

Aircraft

Shipyards

List of Ships

Events