USS Wapasha (YN-45), later YNT-13, later YTB-737, was a United States Navy net tender, later large harbor tug, in commission from 1941 to 1947. Wapasha was built as the steel-hulled, single-screw tug William J. Moran, completed in September 1938 at Bay City, Michigan, by the Defoe Boat and Motor Works, Inc. William J. Moran was acquired by the U.S. Navy from the of New York City, 9 December 1940. The tug was classified as a yard net tender, renamed USS Wapasha, and designated YN-45 on 25 December 1940. Converted for naval use at the New York Navy Yard in Brooklyn, New York, Wapasha was placed in service on 27 January 1941.