The names of commissioned ships of the United States Navy all start with USS, for "United States Ship". Non-commissioned, primarily civilian-manned vessels of the U.S. Navy under the Military Sealift Command have names that begin with USNS, standing for "United States Naval Ship".
The names of commissioned ships of the United States Navy all start with USS, for "United States Ship". Non-commissioned, primarily civilian-manned vessels of the U.S. Navy under the Military Sealift Command have names that begin with USNS, standing for "United States Naval Ship".