The National Defense Reserve Fleet (NDRF) consists of
ships
A ship is a large vessel that travels the world's oceans and other navigable waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research and fishing. Ships are generally distinguished from boats, ...
of the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
, mostly
merchant vessels, that have been
mothballed but can be activated within 20 to 120 days to provide shipping during national military emergencies, or non-military emergencies such as commercial shipping crises.
The NDRF is managed by the
U.S. Department of Transportation's Maritime Administration
Maritime administrations, or flag state administrations, are the executive arms/state bodies of each government responsible for carrying out the shipping responsibilities of the state, and are tasked to administer national shipping and boating issu ...
(MARAD). It is distinct from the
United States Navy reserve fleets
The United States Navy maintains a number of its ships as part of a reserve fleet, often called the "Mothball Fleet". While the details of the maintenance activity have changed several times, the basics are constant: keep the ships afloat and s ...
, which consist largely of
naval vessels
A naval ship (or naval vessel) is a military ship (or sometimes boat, depending on classification) that is used by a navy. Naval ships are differentiated from civilian ships by construction and purpose. Generally, naval ships are damage resili ...
.
NDRF vessels are at the fleet sites at
James River
The James River is a river in Virginia that begins in the Appalachian Mountains and flows from the confluence of the Cowpasture and Jackson Rivers in Botetourt County U.S. Geological Survey. National Hydrography Dataset high-resolution flowli ...
,
Virginia
Virginia, officially the Commonwealth of Virginia, is a U.S. state, state in the Southeastern United States, Southeastern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States between the East Coast of the United States ...
(
James River Reserve Fleet
The James River Reserve Fleet (JRRF) is located on the James River in the U.S. state of Virginia at () near Fort Eustis. James River Reserve Fleet, a "ghost fleet", is part of the National Defense Reserve Fleet. The Reserve Fleet ships in sto ...
);
Beaumont, Texas (
Beaumont Reserve Fleet
The Beaumont Reserve Fleet, was established by act of Congress in 1946, as a component of the National Defense Reserve Fleet (NDRF). The fleet is located in Beaumont, Texas, Beaumont, Texas.
History
In 1946, the US Government excavated 24 million ...
); and
Suisun Bay
Suisun Bay ( ; Wintun for "where the west wind blows") is a shallow tidal estuary (a northeastern extension of the San Francisco Bay) in Northern California. It lies at the confluence of the Sacramento River and San Joaquin River, forming the e ...
, California (
Suisun Bay Reserve Fleet
The Suisun Bay Reserve Fleet colloquially known as the mothball fleet, is located on the northwest side of Suisun Bay (the northern portion of the greater San Francisco Bay estuary) in Benicia, California. The fleet is within a regulated navig ...
); and at designated outported berths. Former anchorage sites included
Stony Point, New York (
Hudson River Reserve Fleet
The Hudson River Reserve Fleet, formally the Hudson River National Defense Reserve Fleet and popularly the Mothball Fleet, was established by act of Congress in 1946 as a component of the National Defense Reserve Fleet. It was first located off Ta ...
);
Wilmington, North Carolina;
Mobile, Alabama;
Astoria, Oregon; and
Olympia, Washington.
Through the 2010s, the oldest, most decrepit hulls at Suisun Bay were stripped of toxic materials, then
broken up
Ship breaking (also known as ship recycling, ship demolition, ship scrapping, ship dismantling, or ship cracking) is a type of ship disposal involving the breaking up of ships either as a source of Interchangeable parts, parts, which can be sol ...
in Texas, California, or Asia. Twenty of the most polluting mothball ships were recycled by 2012, and another 32 by 2017.
At its peak, in 1950, the NDRF had 2,277 ships in lay-up. In 2003, it had 274. In July 2007, it held 230 ships, primarily dry-cargo ships, with some tankers, military auxiliaries, and other types. In December 2021, the number of ships was down to 91.
History
The NDRF was established under Section 11 of the Merchant Ship Sales Act of 1946 to serve as a reserve of ships for national defense and national emergencies.
NDRF vessels were used in seven wars and crises:
*During the
Korean War
The Korean War (25 June 1950 – 27 July 1953) was an armed conflict on the Korean Peninsula fought between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK) and their allies. North Korea was s ...
, 540 vessels were broken out to move military forces.
*During a worldwide tonnage shortfall in 1951–53, more than 600 ships were reactivated to carry coal to Northern Europe and grain to
India
India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
.
*From 1955 through 1964, another 600 ships were used to store grain for the
Department of Agriculture
An agriculture ministry (also called an agriculture department, agriculture board, agriculture council, or agriculture agency, or ministry of rural development) is a ministry charged with agriculture. The ministry is often headed by a minister f ...
.
*Another 223 cargo ships and 29 tankers were activated during a tonnage shortfall after the
Suez Canal
The Suez Canal (; , ') is an artificial sea-level waterway in Egypt, Indo-Mediterranean, connecting the Mediterranean Sea to the Red Sea through the Isthmus of Suez and dividing Africa and Asia (and by extension, the Sinai Peninsula from the rest ...
was closed in 1956.
*During the
Berlin Crisis of 1961
The Berlin Crisis of 1961 () was the last major European political and military incident of the Cold War concerning the status of the German capital city, Berlin, and of History of Germany (1945–90), post–World War II Germany. The crisis cul ...
, 18 vessels were activated and remained in service until 1970.
*Another 172 vessels were activated for the
Vietnam War
The Vietnam War (1 November 1955 – 30 April 1975) was an armed conflict in Vietnam, Laos, and Cambodia fought between North Vietnam (Democratic Republic of Vietnam) and South Vietnam (Republic of Vietnam) and their allies. North Vietnam w ...
.
Ready Reserve Force
In 1976, a
Ready Reserve Force component was established as a subset of the NDRF to provide rapid deployment of military equipment and later became known as the Ready Reserve Force, which numbers 72 vessels. These are crewed with a reduced crew but kept available for activation within four, five, ten or twenty days.
An additional 28 ships are held under
United States Maritime Administration
The United States Maritime Administration (MARAD) is an Government agency#United States, agency of the United States Department of Transportation. MARAD administers financial programs to develop, promote, and operate the United States Maritime ...
(MARAD) custody for other Government agencies on a cost-reimbursable basis.
Operations
Vessels with military utility or logistic value are held in retention status and are in a
preservation program that is designed to keep them in the same condition as when they enter the fleet. The internal spaces are dehumidified to slow the corrosion of metal and the growth of mold and mildew. DC power is distributed through anodes to the exterior underwater portions of the hull, creating an electric field that
suppresses corrosion and preserves the surface of the hull. External painting and other cosmetic work are generally deferred since they do not affect the ability to activate and operate the vessel.
MARAD
Marad (Sumerian: Marda, modern Tell Wannat es-Sadum or Tell as-Sadoum (also Wana-Sedoum), Iraq) was an ancient Near Eastern city. Marad was situated on the west bank of the then western branch of the Upper Euphrates River west of Nippur in moder ...
is authorized as the government's disposal agent through the NDRF program for merchant type vessels equal to or greater than 1,500 gross tons. A state agency can file an application to request title to a vessel "as-is where-is" from the NDRF for the purpose of creating an
artificial reef
An artificial reef (AR) is a human-created freshwater or marine benthic structure.
Typically built in areas with a generally featureless bottom to promote Marine biology#Reefs, marine life, it may be intended to control #Erosion prevention, erosio ...
. A total of 51 vessels have been transferred to 10 states under the program including: Texas (12), Florida (10),
North Carolina
North Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, South Carolina to the south, Georgia (U.S. stat ...
(7),
Virginia
Virginia, officially the Commonwealth of Virginia, is a U.S. state, state in the Southeastern United States, Southeastern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States between the East Coast of the United States ...
(6),
Alabama
Alabama ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South, Deep Southern regions of the United States. It borders Tennessee to the north, Georgia (U.S. state), Georgia to the east, Florida and the Gu ...
(5),
Mississippi
Mississippi ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South regions of the United States. It borders Tennessee to the north, Alabama to the east, the Gulf of Mexico to the south, Louisiana to the s ...
(5),
Georgia
Georgia most commonly refers to:
* Georgia (country), a country in the South Caucasus
* Georgia (U.S. state), a state in the southeastern United States
Georgia may also refer to:
People and fictional characters
* Georgia (name), a list of pe ...
(2),
South Carolina
South Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders North Carolina to the north and northeast, the Atlantic Ocean to the southeast, and Georgia (U.S. state), Georg ...
(2), California (1), and
New Jersey
New Jersey is a U.S. state, state located in both the Mid-Atlantic States, Mid-Atlantic and Northeastern United States, Northeastern regions of the United States. Located at the geographic hub of the urban area, heavily urbanized Northeas ...
(1). Of the 132 non-retention vessels in the NDRF, there are 117 that are being prepared for disposal.
The NDRF program can give and lend historic artifacts to maritime-heritage organizations and transfer entire ships to memorial associations through special legislation.
Reserve Fleet Inactive naval ships of merchant design, including amphibious ships but not ships maintained in a mobilization status by MARAD for Military Sealift Command (MSC), may be laid up in the NDRF when overcrowded berthing conditions exist at a Navy Inactive Ship Maintenance Facility. Battleships, cruisers, and aircraft carriers which have been
stricken or those awaiting final disposition may be transferred to MARAD locations for berthing. Initially, these ships will be transferred to MARAD for
caretaking in accordance with the Economy Act of 1932.
Ships transferred to the NDRF may be retained in Navy Mobilization Plans and maintained by MARAD under priorities set by the Department of the Navy. If the Navy decides it no longer needs the ship, the Secretary of the Navy strikes the ship from the Naval Vessel Register and transfers the title to MARAD. When possible, MARAD gets first disposition rights, which allows it to convert merchant ships to the Ready Reserve Force (RRF) or to sell the ship for scrapping in connection with the
Merchant Marine Act of 1936
The Merchant Marine Act of 1936 is a United States federal law. Its purpose is "to further the development and maintenance of an adequate and well-balanced American merchant marine, to promote the commerce of the United States, to aid in the nat ...
, Sec. 508, and use the proceeds to buy more supply ships.
Fleet reduction

The Suisun Bay location contained 324 ships in 1959. Forty years later, the number was down by about 250, but pollutants had begun to accumulate in the area. Paint containing toxins such as
lead
Lead () is a chemical element; it has Chemical symbol, symbol Pb (from Latin ) and atomic number 82. It is a Heavy metal (elements), heavy metal that is density, denser than most common materials. Lead is Mohs scale, soft and Ductility, malleabl ...
,
copper
Copper is a chemical element; it has symbol Cu (from Latin ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orang ...
,
zinc
Zinc is a chemical element; it has symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic tabl ...
and
barium
Barium is a chemical element; it has symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element.
Th ...
had been flaking off many of the ships' hulls and superstructures. By June 2007, some 21 tons of toxic paint debris was estimated to have been shed from the ships, to settle in the bay sediment.
A further 65 tons of paint was estimated to be in danger of flaking off.
[
David Matsuda, acting administrator of MARAD, said in March 2010 "We are moving expeditiously to remove the worst-polluting ships first and diligently moving to clean the rest." Some 52 ships were identified as problematic, and were scheduled for removal and recycling by September 2017.][ The process began in October 2009; as of October 2012, 36 ships had been removed and the disposal effort was ahead of schedule.] One such vessel, the SS ''Winthrop'', the last Victory ship
The Victory ship was a class of cargo ship produced in large numbers by American shipyards during World War II. They were a more modern design compared to the earlier Liberty ship, were slightly larger and had more powerful steam turbine engin ...
of the California mothball fleet, was towed in March 2010 to BAE Systems
BAE Systems plc is a British Multinational corporation, multinational Aerospace industry, aerospace, military technology, military and information security company, based in London. It is the largest manufacturer in Britain as of 2017. It is ...
San Francisco Ship Repair dock to be cleaned of barnacles and plant matter before its final journey to ship breakers in Brownsville, Texas
Brownsville ( ) is a city in the U.S. state of Texas and the county seat of Cameron County, Texas, Cameron County, located on the western Gulf Coast in South Texas, adjacent to the Mexico–United States border, border with Matamoros, Tamaulipas ...
. The hull cleaning was prescribed by the U.S. Coast Guard to prevent the spread of California species to other locations.[ Some of the recycling work may be completed in the San Francisco Bay Area, specifically at the former ]Mare Island Naval Shipyard
The Mare Island Naval Shipyard (MINSY or MINS) was the first United States Navy base established on the Pacific Ocean and was in service 142 years from 1854 to 1996. It is located on Mare Island, northeast of San Francisco, in Vallejo, Califor ...
—an application for such work is under permit review. Some $38 million in federal funds will be used to complete the dismantling project.
List of NDRF ships
:[https://www.maritime.dot.gov/sites/marad.dot.gov/files/2025-02/2025_01%20Public%20NDRF%20Inventory.pdf ]
See also
*Reserve fleet
A reserve fleet is a collection of naval vessels of all types that are fully equipped for service but are not currently needed; they are partially or fully Ship decommissioning, decommissioned. A reserve fleet is informally said to be "in mothba ...
*Suisun Bay Reserve Fleet
The Suisun Bay Reserve Fleet colloquially known as the mothball fleet, is located on the northwest side of Suisun Bay (the northern portion of the greater San Francisco Bay estuary) in Benicia, California. The fleet is within a regulated navig ...
*United States Navy reserve fleets
The United States Navy maintains a number of its ships as part of a reserve fleet, often called the "Mothball Fleet". While the details of the maintenance activity have changed several times, the basics are constant: keep the ships afloat and s ...
* U.S. Merchant Marine Academy
* Ready Reserve Fleet Alameda
References
External links
NDRF inventory archive
U.S. Maritime Administration
a division of the US Department of Transportation
The United States Department of Transportation (USDOT or DOT) is one of the executive departments of the U.S. federal government. It is headed by the secretary of transportation, who reports directly to the president of the United States a ...
. (This article incorporates material taken from that public domain website.)
National Defense Reserve Fleet (NDRF)
at the Federation of American Scientists
The Federation of American Scientists (FAS) is an American nonprofit global policy think tank with the stated intent of using science and scientific analysis to attempt to make the world more secure. FAS was founded in 1945 by a group of scient ...
website
Ship inventory of the NDRF as at July 31 2014
(More recent records, when available, may be accessed by changing the last part of the link URL, using the format /iyymmdd.pdf - note that mmdd must be the last day of the relevant month.)
pmars.marad.dot.gov
MARAD/DOT official data on current inventory and historical records.
PMARS MARAD Reserve Fleet Current Inventory
Inside the Ghost Ships of the Mothball Fleet
Unauthorized Photo Essay of the NDRF (May 2011)
*
Satellite image
of the Reserve Fleet in the James River near Fort Eustis, Virginia fro
Google Maps
Aerial image
of the Reserve Fleet in the Suisun Bay near Benicia, California fro
Google Maps
Satellite image
of the Reserve Fleet in the Neches River near Beaumont, Texas fro
Google Maps
{{Coord, 38.07161, N, 122.09673, W, source:placeopedia, display=title
1946 establishments in the United States
Fleets of the United States Navy
United States Navy Reserve