Mahogany (YN 18) was laid down 18 October 1940 by the American Shipbuilding Company, Cleveland, Ohio; launched 13 February 1941; and commissioned 22 December 1942.

She completed passage through the Panama Canal 14 July and continued on to San Diego, California, for further exercises.

Arriving Pearl Harbor in August, she soon steamed westward; and, from 14 September into March 1945, she laid and tended torpedo nets, moorings and buoys, and participated in various towing, salvage and demolition operations in the central Pacific Ocean.

She operated with minecraft during the 82 day campaign, 1 April to 21 July, and then remained in the Okinawa Gunto area until after the end of the war.

Mahogany received one battle star for her participation in the Okinawa Gunto operation.