This list includes all major USN auxiliaries which provide direct support services to the combatant fleet. Other auxiliaries, including special-mission and general support ships, minor auxiliaries and yard craft, and research & survey ships are listed separately.
Ships not yet commissioned, or in long-term overhaul/conversion, are listed in italics. Navigation and surface-search radars are not listed. All classifications are purely unofficial and are based on an attempt to use standard classifications throughout all navies; they may or may not correspond to "official" designations. Where two dates are given (i.e. 1965/82), the first is the date of initial completion, and the second is the date of acquisition, conversion, or transfer. Designations given in (parentheses) are assigned but not displayed on the ship's hull.
MSC-manned ships carry the prefix "USNS" with their names; all others are "USS". Chartered craft are M/V.
Blue Ridge
class joint command ships (2 ships)
Concept/Program: Very large command ships, originally built as amphibious command ships but now employed as fleet/joint expeditionary force command ships. The Navy now refers to these ships as "LCC/JCC", indicating "Joint Command Ship". The JCC(X) program is a notional replacement for the existing LCCs and AGFs; 4 JCC(X) would be built, possibly based on the LPD 17 design.
Builders: Philadelphia Naval Shipyard, PA and Newport News Shipbuilding, VA, respectively.
Design: Use Iwo Jima class LPH hull, but with extensive internal and superstructure changes. Large, flat deck for antennas, with large midships superstructure and small aft helicopter pad. There have been extensive changes in their communications outfit, and 3"/50cal guns & Sea Sparrow missiles have been removed. Installation of two 21-cell RAM launchers is planned.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| LCC 19 | Blue Ridge | 1970/72 | PAC | Yokosuka, Japan | 7th Fleet | |
| LCC 20 | Mount Whitney | 1971 | ATL | Norfolk | 2nd Fleet |
Coronado
(modified Austin class) joint command ship
Concept/Program: Former LPD converted to the command role. Initially served as a temporary flagship with limited modification; later fully converted and was extensively upgraded in 1997 to become the most capable of the command ships. Reclassified from LPD 11 to AGF 11 in 1980.
Builders: Lockheed SB & Construction, Seattle, WA; conversion by Philadelphia Naval Shipyard, PA.
Design: The initial conversion was relatively limited, apparently including only existing flag and berthing areas, and topside modifications to accommodate additional antennas. The 1997 conversion included construction of command spaces in former well deck, additional berthing, and extensive shipboard electronics installations. The stern gate has been removed and the docking well permanently sealed.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| AGF 11 | Coronado | 1970/80 | PAC | San Diego | 3rd Fleet |
La Salle
(modified Raleigh class) joint command ship
Concept/Program: Former LPD converted to the command role, initially for the Persian Gulf and now as 6th Fleet Flagship. Redesignated from LPD 3 to AGF 3 in 1972.
Builders: New York Naval Shipyard, NY; conversion by Philadelphia Naval Shipyard, PA.
Design: Conversion included construction of command spaces in former troop spaces, extensive internal modifications, topside modifications to accommodate antennas, and construction of a helicopter hangar. The well deck was initially retained but now has been closed up and converted to command spaces. Underwent a major overhaul in 1993-1994.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| AGF 3 | La Salle | 1964/72 | ATL | Gaeta, Italy | 6th Fleet |
Supply
class fast multi-product replenishment ships (4 ships)
Concept/Program: A new class of fast replenishment ships, intended to operate with carrier battle groups in combat areas. These ships are now being transferred to MSC operation.
Builders: NASSCO, San Diego, CA.
Design: Based on Sacramento (AOE 1) design, but with major changes: all new propulsion systems, new topside arrangements, different weapons arrangement, updated UNREP gear, Level III collective protection against CBR attack. Construction was much-delayed by propulsion system problems. The problems appear to have been resolved and some reports indicate these vessels are capable of 30+ knots.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| T-AOE 6 | Supply | 1994 | ATL | Earle, NJ | LogRon2 | |
| AOE 7 | Rainier | 1994 | PAC | Bremerton | -- | |
| T-AOE 8 | Arctic | 1995 | ATL | Earle, NJ | LogRon2 | |
| AOE 10 | Bridge | 1998 | PAC | Bremerton | -- |
Sacramento
class fast multi-product replenishment ships (4 ships)
Concept/Program: Large, fast replenishment ships meant for operation with carrier battle groups in combat areas. Although it has been reported that the weapons systems would be deactivated or removed, they have been retained operational. These ships are elderly and in need of replacement. The new T-AKE class ships are intended to replace these vessels, but their poor condition will force early retirement without immediate replacements.
Builders: Puget Sound Naval Shipyard, Bremerton, WA, except AOE 2 by New York SB, Camden, NJ.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| AOE 1 | Sacramento | 1964 | PAC | Bremerton | -- | |
| AOE 2 | Camden | 1967 | PAC | Bremerton | -- | |
| AOE 3 | Seattle | 1969 | ATL | Norfolk | LogRon2 | |
| AOE 4 | Detroit | 1970 | ATL | Earle, NJ | LogRon2 |
Lewis and Clark class
multi-product replenishment ships (0+12 ships)
Concept/Program: A new class to replace the existing AE/AFS types and the AOE 1 class. Ships will carry all types of dry cargo and limited cargo fuel; they will be much larger than the existing AE/AFS ships. To replace the AOEs, each ship will operate with a T-AO 187 class ship. The contract for design and construction of three ships has been awarded, with options for 9 more ships. The ships will be civilian-manned, operated by MSC. The program was formerly known as T-ADC(X).
Builders: NASSCO, San Diego, CA.
| Number | Name | Year | FLT | Homeport | Group | Notes | |
| T-AKE 1 | Lewis and Clark | Ordered | |||||
| T-AKE 2 | Sacagawea | Ordered | |||||
| T-AKE 3 | Ordered | ||||||
| T-AKE 4 | Option | ||||||
| T-AKE 5 | Option | ||||||
| T-AKE 6 | Option | ||||||
| T-AKE 7 | Option | ||||||
| T-AKE 8 | Option | ||||||
| T-AKE 9 | Option | ||||||
| T-AKE 10 | Option | ||||||
| T-AKE 11 | Option | ||||||
| T-AKE 12 | Option |
Kilauea
class ammunition ships (4 ships)
Concept/Program: These are large, highly capable ammunition ships. They have been transferred to MSC operation, including a major overhaul to convert them for civilian manning. AE 29 was discarded instead of being transferred to MSC. AE 27 & AE 28 were laid up upon assignment to MSC, and have not undergone the conversion overhaul; AE 27 is in Category B reserve and AE 28 is nominally in 90-day recall Reduced Operating Status. T-AE 26 was placed in reduced operating status 10/2001. All of these ships will be replaced by the T-AKE class.
Builders: Ingalls SB, Pascagoula, MS.
Design: Superstructure-aft ships with UNREP gear forward; helicopter deck aft. Limited capability for fuel replenishment. For MSC service their accomodations were upgraded, and weapons, radars, EW systems, etc., were removed.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| T-AE 32 | Flint | 1971/95 | PAC | (none) | MSC Far East | |
| T-AE 33 | Shasta | 1972/97 | PAC | (none) | MSC Pacific | |
| T-AE 34 | Mount Baker | 1972/96 | ATL | (none) | MSC Europe | |
| T-AE 35 | Kiska | 1972/96 | PAC | (none) | MSC Pacific |
Mars
class stores ships (3 ships)
Concept/Program: Survivors of the last 7 USN-built stores ships, they supply general stores and spares support to the fleet. All have now been transferred to MSC for operation and have undergone conversion overhauls. AFS 2 and AFS 4 were discarded instead of being transferred to MSC; AFS 1 and AFS 6 were transferred to MSC but have been deactivated. All of these ships will be replaced by the T-AKE class.
Builders: NASSCO, San Diego, CA
Design: Superstructure-midships ships with UNREP gear forward and aft; helicopter deck aft. Limited capability for fuel replenishment. For MSC service their accomodations were upgraded, and weapons, radars, EW systems, etc., were removed.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| T-AFS 3 | Niagara Falls | 1967/94 | PAC | (none) | MSC Central | |
| T-AFS 5 | Concord | 1968/92 | PAC | (none) | MSC Far East | |
| T-AFS 7 | San Jose | 1970/93 | PAC | (none) | MSC Far East |
Sirius
(RFA Lyness) class stores ships (3 ships)
Concept/Program: Former Royal Navy stores ships acquired 1981-1983 to support increased USN operations in the Indian Ocean. They now make up half the USN AFS force. All are MSC-operated. Will be replaced by the T-AKE class.
Builders: Swan Hunter & Wighman Richardson, Wallsend-on-Tyne, UK.
History: Formerly RFA Lyness, Tarbarness and Stromness, respectively.
Design: Modifications for US service have included helicopter hangars, new data and communications systems, etc. All RN spares for the class were purchased in 1983. They have undergone major overhauls/upgrades in US service.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| T-AFS 8 | Sirius | 1966/81 | ATL | (none) | MSC Europe | |
| T-AFS 9 | Spica | 1967/81 | ATL | (none) | MSC Europe | |
| T-AFS 10 | Saturn | 1966/83 | ATL | (none) | MSC Atlantic |
Henry J. Kaiser
class fleet oilers (13 ships)
Concept/Program: USN's sole fleet oilers; they have replaced all previous AOs. Two ships were cancelled when nearly complete (AO 191, 192). Three were taken out of service, but one has been reactivated (AO 189) with two remaining in reserve (AO 188, 190). One additional unit is in Reduced Operating Status (ROS) with the Afloat Prepositioning Force (AO 187). Several others were temporarily placed in reduced operating status, but have now returned to service to replace the AO 177 class ships.
Builders: Avondale SY, New Orleans.
Design: Typical small tanker design, helicopter deck aft; limited solid-stores replenishment capability. AO 201, 203, 204 were modified while building to become the first double-hull USN tankers, delaying their completion.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| T-AO 189 | John Lenthall, Jr. | 1987 | ATL | (none) | MSC Atlantic | |
| T-AO 193 | Walter S. Diehl | 1988 | PAC | (none) | MSC Far East | |
| T-AO 194 | John Ericsson | 1991 | PAC | (none) | MSC Pacific | |
| T-AO 195 | Leroy Grumman | 1989 | ATL | (none) | MSC Atlantic | |
| T-AO 196 | Kanawha | 1991 | ATL | (none) | MSC Europe | |
| T-AO 197 | Pecos | 1990 | PAC | (none) | MSC Pacific | |
| T-AO 198 | Big Horn | 1992 | ATL | (none) | MSC Europe | |
| T-AO 199 | Tippecanoe | 1993 | PAC | (none) | MSC Far East | |
| T-AO 200 | Guadalupe | 1992 | PAC | (none) | MSC Pacific | |
| T-AO 201 | Patuxent | 1995 | ATL | (none) | MSC Europe | |
| T-AO 202 | Yukon | 1994 | PAC | (none) | MSC Central | |
| T-AO 203 | Laramie | 1996 | ATL | (none) | MSC Atlantic | |
| T-AO 204 | Rappahannock | 1995 | PAC | (none) | MSC Far East |
Emory S. Land
class submarine tenders/repair ships (2 ships)
Concept/Program: Large, modern, highly capable submarine tenders; the last such ships built for USN service. AS 39 is Homeported in Italy as the 6th Fleet station tender; AS 40 is the Guam station tender. Both ships now undertake repair work for surface ships as well as submarines. Sister AS 41 is laid up in reserve.
Builders: Lockheed SB & Construction, Seattle, WA.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| AS 39 | Emory S. Land | 1979 | ATL | La Maddalena, Italy | -- | |
| AS 40 | Frank Cable | 1980 | PAC | Guam | -- |
Safeguard
class salvage tugs (4 ships)
Concept/Program: Large, highly capable salvage tugs, capable of all types of salvage & ocean towing; equipped to operate ROVs for undersea search. 65.5 ton bollard pull, 360 ton pull with beach extraction gear, 150 ton deadlift. These are the last USN salvage tugs, but are supplemented by the ATFs and chartered ships in the salvage and fleet support role.
Builders: Peterson Builders, Sturgeon Bay, WI.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| ARS 50 | Safeguard | 1985 | PAC | Sasebo, Japan | -- | |
| ARS 51 | Grasp | 1985 | ATL | Little Creek | LogRon2 | |
| ARS 52 | Salvor | 1986 | PAC | Pearl Harbor | NavSurfGruMidPac | |
| ARS 53 | Grapple | 1986 | ATL | Little Creek | LogRon2 |
Powhatan
class fleet tugs (5 ships)
Concept/Program: General-purpose ocean tugs; the design is based on commercial oilfield support tugs. Are now being fitted with limited salvage/rescue capabilities to supplement the small surviving ARS force. Two sisters (ATF 166, 167) have been deactivated; one is on commercial lease and the other is used by another branch of the Navy.
Builders: Marinette Marine, WI.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| T-ATF 168 | Catawaba | 1980 | PAC | (none) | MSC Central | |
| T-ATF 169 | Navajo | 1980 | PAC | (none) | MSC Pacific | |
| T-ATF 170 | Mohawk | 1980 | ATL | (none) | MSC Atlantic | |
| T-ATF 171 | Sioux | 1981 | PAC | (none) | MSC Pacific | |
| T-ATF 172 | Apache | 1981 | ATL | (none) | MSC Europe |
Impeccable
ocean surveillance ship
Concept/Program: An enlarged SWATH surveillance ship intended for operation in severe ocean conditions. The program has been extensively delayed by shipyard problems, and the remaining four ships of the program (AGOS 24-27) will not be constructed. Although delivered in 2001, this ship will not be operational until 2004. This is the largest SWATH ship ever constructed.
Builders: Halter Marine, Gulfport, MS; some components by American SB, Tampa, FL prior to cancellation of original contract.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| (T-AGOS 23) | Impeccable | 2001 |
Victorious
class ocean surveillance ships (4 ships)
Concept/Program: A class of four SWATH surveillance ships, intended for service in northern latitudes. These were the first operational SWATH ships in any navy.
Builders: McDermott, Morgan City, LA.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| (T-AGOS 19) | Victorious | 1991 | PAC | (none) | MSC Far East | |
| (T-AGOS 20) | Able | 1992 | ATL | (none) | MSC Europe | |
| (T-AGOS 21) | Effective | 1993 | PAC | (none) | MSC Pacific | |
| (T-AGOS 22) | Loyal | 1993 | ATL | (none) | MSC Europe |
Stalwart
class ocean surveillance ships (3 ships)
Concept/Program: Conventional-hull SURTASS surveillance ships, with the same hull as the Powhatan class tugs. 18 ships of this class were completed; only these three remain in service in their original role. Three serve as as counter-narcotics patrol/surveillance ships and one as a missile tracking ship. Two were transferred to USCG as patrol ships but have been deactivated; one of these was transferred to NOAA. Three other ships were transferred to NOAA (for a total of four), two to Portugal, one each to the US Merchant Marine Academy, US Geologic Survey (then to US Army), and New Zealand.
Builders: Tacoma Boatbuilding, WA.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| (T-AGOS 8) | Prevail | 1986 | ATL | (none) | MSC Atlantic | |
| (T-AGOS 9) | Assertive | 1986 | PAC | (none) | MSC Pacific | |
| (T-AGOS 12) | Bold | 1989 | ATL | (none) | MSC Atlantic |
Cory Chouest
ocean surveillance ship
Concept/Program: Former oilfield support tug chartered and extensively converted to conduct trials with SURTASS and Low Frequency Active (LFA) towed sonar array. Was employed to test and deploy the LFA sonar prior to completion of T-AGOS 23.
Builders: Ulstein Hatlo, Ulsteinvik, Norway.
| Number | Name | Year | FLT | Homeport | Group | Notes |
| -- | Cory Chouest | 1974/91 | PAC | Pearl Harbor | MSC Pacific |