USS "Shackle" was laid down on 26 October 1942 by the Basalt Rock Company in Napa, California; launched on 1 April 1943; sponsored by Mrs. Walker Cochran; and commissioned on 5 February 1944, Lieutenant Charles G. Jenkins, Jr., in command. At the time of its building, the country was at war and in need of more naval vessels. As a result of the necessity, three ships, identified only as "naval auxiliaries" underwent construction. The project took less than a year to complete and would become fleet rescue and salvage vessels serving in the Pacific Theater. These vessels would later all become Coast Guard cutters.