Military operations overseas have always required the support of civilian ships, either government-owned or chartered. These were rarely sent directly into combat, instead being used to move cargo and troops from one port to another. In the US, these ships were managed by a number of different organizations, who often competed for tonnage. In the aftermath of WWII, it was decided to bring this cumbersome arrangement to an end, centralizing all military water transport under a single organization managed by the Navy, which became known as the Military Sea Transportation Service. The Army's transports were handed over to the Navy, which initially operated a mix of chartered, government-owned but civilian-manned and Navy-manned ships. The chartered vessels received a four-digit hull number and kept their existing merchant prefixes, while the civilian-manned ships were designed USNS, for United States Naval Ship. This was distinct from the USS used by commissioned and Navy-manned ships, which could legally be armed. Both types had their hull numbers prefixed by T- to indicate MSTS/MSC control, although MSTS ended the use of Naval crews in the 1960s.

USNS General A.W. Greely at Thule, Greenland
MSTS, renamed Military Sealift Command (MSC) in 1970, provided cargo transport throughout the Cold War, supporting operations in Korea and Vietnam as well as less-visible military work around the world. It also began to take over operation of various special-mission ships for tasks like laying cables, hydrographic surveys, and tracking missile tests. But in 1971, investigation began on a new mission. The draft was coming to an end, and the cost of manpower was rising rapidly. So far, MSTS/MSC had only moved cargo point-to-point, but it could potentially take over many of the Navy's auxiliaries as well, much as the British Royal Fleet Auxiliary (RFA) had for the past several decades. After successful tests in 1972, the oiler Taluga was the first vessel decommissioned and turned over to MSC, with her crew of 314 being replaced by a 105-man civilian crew and a 16-man naval detachment primarily responsible for communications.1 Read more...









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