The Sound Surveillance System (SOSUS) was a submarine detection system based on passive sonar developed by the United States Navy to track Soviet submarines. The system's true nature was classified with the name and acronym SOSUS themselves classified. The unclassified name Project Caesar was used to cover the installation of the system and a cover story developed regarding the shore stations, identified only as a Naval Facility (NAVFAC), being for oceanographic research. In 1985, as the fixed bottom arrays were supplemented by the mobile Surveillance Towed Array Sensor System (SURTASS) and other new systems were coming on line, the name itself changed to Integrated Undersea Surveillance System (IUSS). The commands and personnel were covered by the "oceanographic" term until 1991 when the mission was declassified. As a result, the commands, Oceanographic System Atlantic and Oceanographic System Pacific became Undersea Surveillance Atlantic and Undersea Surveillance Pacific, and personnel were able to wear insignia reflecting the mission.
USNS Kingsport (T-AG-164) was built as SS Kingsport Victory, a United States Maritime Commission VC2-S-AP3 (Victory) type cargo ship. During the closing days of World War II the ship was operated by the American Hawaiian Steamship Company under an agreement with the War Shipping Administration. After a period of layup the ship was operated as USAT Kingsport Victory by the Army under bareboat charter effective 8 July 1948. When Army transports were transferred to the Navy's Military Sea Transportation Service the ship continued as USNS Kingsport Victory (T-AK-239), a cargo transport. On 14 November 1961, after conversion into the first satellite communication ship, the ship was renamed Kingsport, reclassified as a general auxiliary, and operated as USNS Kingsport (T-AG-164).
USNS Mizar (MA-48/T-AGOR-11/T-AK-272) was a vessel of the United States Navy. She was named after the star Mizar.
SS Albert M. Boe was a Liberty ship laid down on 11 July 1945 at the East Yard of New England Shipbuilding Corporation in Portland, Maine, as a boxed aircraft transport. The ship is notable as the final liberty ship built.
SS Mission San Fernando was a Type T2-SE-A2 tanker built for the United States Maritime Commission during World War II. After the war she was acquired by the United States Navy as USS Mission San Fernando (AO-122). Later the tanker transferred to the Military Sea Transportation Service as USNS Mission San Fernando (T-AO-122). She was a member of the Mission Buenaventura-class oiler and was named for Mission San Fernando Rey de España in Los Angeles. She was later renamed USNS Muscle Shoals (T-AGM-19), and, later, USNS Vanguard (T-AG-194).
USS Thor was a cable repair ship that supported Project Caesar, the unclassified name for installation of the Sound Surveillance System (SOSUS). Originally the Artemis-class attack cargo ship Vanadis (AKA-49) which was briefly in commission from 9 July 1945 to 27 March 1946, it was converted in 1955 after nine years in the reserve fleet.
USNS Sgt. Jonah E. Kelley (T-APC-116), was originally built as Link Splice under a United States Maritime Commission contract and was laid down on 29 January 1945 by the Southeastern Shipbuilding Corporation in Savannah, Georgia. She was launched on 17 March 1945, sponsored by Mrs. L. W. Grothaus and delivered to the War Shipping Administration for operation by the Moore McCormack Lines on 28 August 1945.
USNS Albert J. Myer (T-ARC-6) was the second of only two Maritime Commission type S3-S2-BP1 ships built for the US Army near the end of World War II intended to support Army Signal Corps communications cables. She is named for Brig. Gen. Albert J. Myer, the founder of the Signal Corps. The other ship was the William H. G. Bullard, later USS Neptune, which Myer later joined in naval service.
USNS Neptune (ARC-2), was the lead ship in her class of cable repair ships in U.S. Naval service. The ship was built by Pusey & Jones Corp. of Wilmington, Delaware, Hull Number 1108, as the USACS William H. G. Bullard named for Rear Adm. William H. G. Bullard. She was the first of two Maritime Commission type S3-S2-BP1 ships built for the US Army Signal Corps near the end of World War II. The other ship was the Albert J. Myer, which later joined her sister ship in naval service as the USNS Albert J. Myer (T-ARC-6).
USS Aeolus (ARC-3) began service as USS Turandot (AKA-47), an Artemis-class attack cargo ship built by the Walsh-Kaiser Co., Inc. of Providence, Rhode Island. In 1954 she was converted into a cable repair ship to support Project Caesar, the unclassified name for installation of the Sound Surveillance System SOSUS. Aeolus was the first of two ships, the other being USS Thor (ARC-4), to be converted into cable ships. Aeolus performed cable duties for nearly thirty years, from 1955 to 1973 as a commissioned ship and from 1973 until 1985 as the civilian crewed USNS Aeolus (T-ARC-3) of the Military Sealift Command (MSC). The ship was retired in 1985 and sunk as an artificial reef in 1988.
USNS Bald Eagle (T-AF-50) was a Maritime Commission type C2-S-B1 cargo ship delivered to the War Shipping Administration (WSA) in May 1943. The ship was operated by WSA agent shipping companies until July 1948 when laid up in the James River Reserve Fleet briefly before beginning operation for the U.S. Army in October. When the Navy's Military Sea Transportation Service (MSTS) took over all military ocean shipping in 1950 the ship was transferred to operate as one of six refrigerated cargo ships in the MSTS fleet until July 1970 as USNS Bald Eagle. The ship was permanently transferred to Maritime Commission custody in September 1971 and sold for scrap in 1973.
USNS Sgt. George D. Keathley, was a World War II United States cargo vessel that was used for troop transport and later converted to a survey vessel. She was laid down and launched as MS Alexander R. Nininger, Jr., then renamed MS Acorn Knot. She was put into US Army service as USAT Acorn Knot, then renamed USAT Sgt. George D. Keathley. She was transferred to the US Navy and became USNS Sgt. George D. Keathley (T-APC-117), but was later re-designated T-AGS-35. She was leased to the Republic of China, where she served as Chu Hwa (AGS-564). Both Nininger and Keathley were posthumous Medal of Honor recipients.
USNS Sgt. Curtis F. Shoup (T-AG-175) was a C1-M-AV1 coastal freighter. Built as Spindle Eye, one of the many named for knots. The ship, modified to be a "news transmission ship" for the press during the planned invasion of Japan, was completed 9 July 1945, delivered to the War Shipping Administration and placed under its agent Lykes Brothers Steamship Company the same day. Days later, on 26 July, Spindle Eye was bareboat chartered to the War Department for operation by the Army. The ship was renamed November 1947 by the Army, after serving as a radio relay ship at the Operation Crossroads atomic bomb tests and conversion to an Army passenger-cargo vessel, Sgt. Curtis F. Shoup in honor Sergeant Curtis F. Shoup who had been awarded the Medal of Honor.
USNS Sgt. Archer T. Gammon (T-AK-243) was a Boulder Victory-class cargo ship built at the end of World War II and served the war and its demilitarization as a commercial cargo vessel. From 1946 to 1950 she served the U.S. Army as a transport named USAT Sgt. Archer T. Gammon. In 1950 she was acquired by the United States Navy and assigned to the Military Sea Transportation Service. In 1973 she ended her career and was struck and scrapped.
USNS Private Frank J. Petrarca (T-AK-250) was a US Maritime Administration (MARCOM) C1-M-AV1 type coastal cargo ship, originally planned as an Alamosa-class cargo ship. Constructed as Long Splice for MARCOM, completed in September 1945 and placed in operation by the War Shipping Administration (WSA) during the closing period of World War II. However, the war ended, and she was transferred to the US Army as USAT Private Frank J. Petrarca who kept her in service until transferred to the US Navy in 1950.
USNS Maumee (T-AO-149), later T-AOT-149, was a United States Navy Maumee-class oiler, later transport oiler, in non-commissioned service with the Military Sea Transportation Service (MSTS), later Military Sealift Command, from 1956 until probably the mid-1980s.
The fifth USNS Potomac (T-AO-181) was a United States Navy oiler in non-commissioned service with the Military Sea Transportation Service, later Military Sealift Command, from 1976 to 1983.
USNS Marine Adder (T-AP–193) was a troop ship for the United States Navy in the 1950s. She was built in 1945 for the United States Maritime Commission as SS Marine Adder, a Type C4-S-A3 troop ship, by the Kaiser Company during World War II. In 1950, the ship was transferred to the Military Sea Transport Service of the U.S. Navy as a United States Naval Ship staffed by a civilian crew. After ending her naval service in 1957, she entered the National Defense Reserve Fleet, but was sold for commercial use in 1967. She was used in part to carry supplies to support the Vietnam War efforts. During the summer of ‘72 while in Da Nang harbor, South Vietnam a limpet mine was attached to the hull by a swimmer. The mine blew a hole in the hull. In order to save the ship the Skipper ran it aground in Da Nang harbor. The USS Navy standby salvage ship USS Grasp with its crew of divers installed a box patch over the hole and pumped the water from the bilges, before moving the ship to a pier. US Army tanks hung from ship booms to heel the ship so that a metal patch could be welded in place to return the ship to duty. SS Transcolorado, she was chartered by the Military Sealift Command as a civilian cargo ship designated T-AK-2005.
USNS Zeus (T-ARC-7) is the first cable ship specifically built for the United States Navy. Though planned to be the first of two ships of her class, the second ship was not built, leaving Zeus as the only ship of her class. She is capable of laying 1,000 miles (1,600 km) of cable at depths of up to 9,000 feet (2,700 m).
Canadian Forces Station (CFS) Shelburne is a former Canadian Forces Station that was a shore terminus for the Sound Surveillance System (SOSUS) from 1955 to 1994. It was located in the Municipality of the District of Shelburne, Shelburne County, Nova Scotia.
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