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 sufficiently working as to be reactivated quickly in an emergency.
The National Defense Reserve Fleet (NDRF) consists of ships of the United States, 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 Gopher State-class crane ships of the United States Navy are a class of auxiliary vessels. The lead ship of the class is named in honor of the state of Minnesota. Original United States Maritime Administration (MARAD) designation for the ship is C5-S-73b.
SS Cornhusker State (T-ACS-6) is a crane ship in ready reserve for the United States Navy. She is stationed in Newport News, Virginia under operation control of the Military Sealift Command (MSC). The ship was named for the state of Nebraska, which is also known as the Cornhusker State.
USNS Comet (T-AK-269), later T-LSV-7, later T-AKR-7, later SS Comet, was a vehicle landing ship built for the United States Navy. The lone ship of her class, she was named for the comet, and was the fourth U.S. Naval vessel to bear the name.
MV Gary I. Gordon, formerly USNS Gordon (T-AKR-296), is a Gordon-class roll on roll off vehicle cargo ship of the United States Navy. She was originally built as a merchant vessel, acquired and converted by the Navy, and was assigned to the United States Department of Defense's Military Sealift Command. As of April 2023, the ship was part of the United States Maritime Administration (MARAD) Ready Reserve Force (RRF).
MV Charles L. Gilliland, formerly USNS Gilliland (T-AKR-298), is a Gordon-class roll on roll off vehicle cargo ship of the United States Navy. She was originally built as a merchant vessel but later acquired and converted by the Navy, and assigned to the United States Department of Defense's Military Sealift Command. Gilliland was built in 1972 as MV Selandia. After some time spent in commercial service she was lengthened by Hyundai Heavy Industries in 1984, and later went on to be acquired by the US Navy under a long term charter. She was converted to a US Navy Vehicle Roll-on/Roll-off Ship at Newport News Shipbuilding and Drydock Company in Newport News, Virginia, in a contract dated 23 May 1997 and on completion was assigned to the Military Sealift Command under the name USNS Gilliland, after Medal of Honor recipient Corporal Charles L. Gilliland. Gilliland is one of 28 Strategic Sealift Ships operated by the Military Sealift Command. She was assigned to the MSC Atlantic surge force, and is maintained in Ready Operational Status 4.
SS Grand Canyon State (T-ACS-3) is a crane ship in ready reserve for the United States Navy. The ship was named for the state of Arizona, which is also known as the Grand Canyon State.
SS Keystone State (T-ACS-1) is a crane ship in ready reserve for the United States Navy. The ship was named for the state of Pennsylvania, which is also known as the Keystone State.
SS Gem State (T-ACS-2) is a crane ship in Ready Reserve for the United States Navy. The ship was named for the state of Idaho, which is also known as the Gem State.
For MV Cape Texas, a World War II Type C1-A, see Type C1 ships
MV Cape Taylor (T-AKR-113) is a roll-on/roll-off (RO/RO) ship with the Ready Reserve Force (RRF) of the United States Department of Transportation's Maritime Administration (MARAD). As of 31 December 2014, her homeport is the Port of Houston in Houston, Texas, and she is on ROS-5 status; she is able to be fully operational within 5 days of being activated. When activated, she becomes part of the United States Navy's Military Sealift Command (MSC).
MV Cape Trinity (T-AKR-9711) is a Roll-on/Roll-off (RO/RO) ship with the Ready Reserve Force (RRF) of the United States Department of Transportation's Maritime Administration (MARAD). As of 31 December 2014, the homeport of this motor vessel (MV) is the Port of Houston in Houston, Texas, and she is on ROS-5 status; she is able to be fully operational within 5 days of being activated. When activated, she becomes part of the United States Navy's Military Sealift Command (MSC).
SS Cape Girardeau is a Modular Cargo Delivery System (MCDS) ship in the National Defense Reserve Fleet. The ship is named for Cape Girardeau, Missouri.
Type C8-class ships are a type of Heavy Lift Barge Carrier. Type C8 ships were the 8th type of ship designed by the United States Maritime Commission (MARCOM) in the late 1960s. As done with the Type C1 ships and Type C2 ships, MARCOM circulated preliminary plans for comment. The design presented was not specific to any service or trade route. Type C8 ships measuring 876 feet (267 m) from stem to stern, and designed to make 16.2 knots.
MV Cape Horn (T-AKR-5068) was originally built as a commercial ship in 1979 and sold to the Wilhelmsen Line with the name Barber Tonsberg. She has two sister ships: MV Cape Hudson and MV Cape Henry.
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 storage, called "mothballed", that can be ready for use if needed. Many are awaiting scrapping due to the age or condition of the ship. Some ships are used for target practice or as artificial reefs. A few ships became museum ships and other sold to private companies. Ships can be readied for use in 20 to 120 days during national emergencies or natural disaster. The U.S. Department of Transportation's Maritime Administration (MARAD) provides oversight of the James River Reserve Fleet. For the United States Navy ships the United States Navy reserve fleets stored these ships and submarines.
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United States Navy 
