High Quality Content by WIKIPEDIA articles! USS Adamant (AMc-62) was an Accentor-class minesweeper in the United States Navy during World War II. Adamant was laid down on 31 March 1941 at Greenport, Long Island, New York, by the Greenport Basin & Construction Co. as USS Advance; renamed Adamant on 17 May 1941; launched on 7 June 1941; sponsored by Mrs. Kelly Hunter, a niece of Secretary of the Treasury Henry Morgenthau, Jr.; and placed in service on 26 September 1941 at the New York Navy Yard, Lt. (jg.) R. A. L. Ellis, USNR, in charge.