A Naval Inactive Ship Maintenance Facility (NISMF) is a facility owned by the

United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...

as a holding facility for decommissioned naval vessels, pending determination of their final fate. All ships in these facilities are inactive, but some are still on the

Naval Vessel Register The ''Naval Vessel Register'' (NVR) is the official inventory of ships and service craft in custody of or titled by the United States Navy. It contains information on ships and service craft that make up the official inventory of the Navy from t ...

(NVR), while others have been stricken from the register. The ships that have been stricken from the NVR are disposed of by one of several means, including

foreign military sales Foreign Military Sales (FMS) is a security assistance program of the United States government to facilitate the purchase of U.S. arms, defense equipment, design and construction services, and military training to foreign governments. FMS is a gove ...

transfer, ship donation as a

museum A museum is an institution dedicated to displaying or Preservation (library and archive), preserving culturally or scientifically significant objects. Many museums have exhibitions of these objects on public display, and some have private colle ...

or memorial, domestic dismantling and recycling,

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 ...

ing, or use as a target vessel. Others are retention assets for possible future reactivation, which have been laid up for long-term preservation and are maintained with minimal maintenance (humidity control, corrosion control, flood/fire watch) should they need to be recalled to active duty. The Navy has been reducing the number of inactive ships, which numbered as many as 195 in 1997, but was down to 49 by the end of 2014. The

Naval Sea Systems Command The Naval Sea Systems Command (NAVSEA) is the largest of the United States Navy's United States Navy systems commands, five "systems commands," or materiel (not to be confused with "material") organizations. From a physical perspective, NAVSEA ha ...

's Inactive Ships Management Office (INACTSHIPOFF) is based in

Portsmouth, Virginia Portsmouth is an Independent city (United States), independent city in southeastern Virginia, United States. It lies across the Elizabeth River (Virginia), Elizabeth River from Norfolk, Virginia, Norfolk. As of the 2020 United States census, 2020 ...

. There are three NISMFs: *

Puget Sound Naval Shipyard Puget Sound Naval Shipyard, officially Puget Sound Naval Shipyard and Intermediate Maintenance Facility (PSNS & IMF), is a United States Navy shipyard covering 179 acres (0.7 km2) on Puget Sound at Bremerton, Washington in uninterrupted ...

–

Bremerton, Washington Bremerton is a city in Kitsap County, Washington, Kitsap County, Washington (state), Washington, United States. The population was 43,505 at the 2020 United States census, 2020 census and an estimated 44,122 in 2021, making it the largest city ...

Joint Base Pearl Harbor–Hickam Joint Base Pearl Harbor–Hickam (JBPHH) is a United States military base on the island of Oahu, Hawaii. It is Joint Base, an amalgamation of the United States Air Force's Hickam Air Force Base and the United States Navy's Naval Station Pearl ...

–

Pearl Harbor, Hawaii Pearl Harbor is an American lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. It was often visited by the naval fleet of the United States, before it was acquired from the Hawaiian Kingdom by the U.S. with the signing of the Rec ...

Philadelphia Naval Shipyard The Philadelphia Naval Shipyard was the first United States Navy shipyard and was historically important for nearly two centuries. Construction of the original Philadelphia Naval Shipyard began during the American Revolution in 1776 at Front ...

–

Philadelphia, Pennsylvania Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the Unit ...

In addition, parts of the

Norfolk Naval Shipyard The Norfolk Naval Shipyard, often called the Norfolk Navy Yard and abbreviated as NNSY, is a U.S. Navy facility in Portsmouth, Virginia, for building, remodeling and repairing the Navy's ships. It is the oldest and largest industrial facility ...

, South Gate Annex Naval Inactive Ship Maintenance Facility and

are designated for the storage of inactive

nuclear power Nuclear power is the use of nuclear reactions to produce electricity. Nuclear power can be obtained from nuclear fission, nuclear decay and nuclear fusion reactions. Presently, the vast majority of electricity from nuclear power is produced by ...

ed vessels. Inactive ship facilities in

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 ...

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 ...

and

Beaumont, Texas Beaumont is a city in the U.S. state of Texas. It is the county seat of Jefferson County, Texas, Jefferson County, within the Beaumont–Port Arthur metropolitan area, located in Southeast Texas on the Neches River about east of Houston (city ...

are owned and operated by the Maritime Administration under the

U.S. 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 ...

Vessels moored at NISMFs

Following is a list of vessels currently being stored at the facilities as of 28 November 2023.

Philadelphia, Pennsylvania

Bremerton, Washington

Pearl Harbor, Hawaii

Past Facilities

* United States Naval Station Orange, Orange, Texas (1966-1975) * Naval Inactive Ship Maintenance Facility Bayonne,

Bayonne, New Jersey Bayonne ( ) is a City (New Jersey), city in Hudson County, New Jersey, Hudson County in the U.S. state of New Jersey, in the Gateway Region on Bergen Neck, a peninsula between Newark Bay to the west, the Kill Van Kull to the south, and New York ...

*NISMF at

Naval Base San Diego Naval Base San Diego is a United States Navy base in San Diego, California. It is the world's second largest surface ship naval base. Naval Base San Diego is the principal homeport of the United States Pacific Fleet, consisting of over 50 ships ...

San Diego, California San Diego ( , ) is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. With a population of over 1.4 million, it is the List of United States cities by population, eighth-most populous city in t ...

NISMF San Diego, California
/ref>

References

{{Reflist, 2

External links

U.S. Navy Inactive Ships Program Office

Official List of Inactive U.S. Navy Ships

Official List of Stricken U.S. Navy Ships

NavSource Online
United States Navy installations Ships of the United States Navy Ship graveyards