USS Stalwart (AM-493/MSO-493) was an Aggressive-class minesweeper acquired by the U.S. Navy for the task of removing mines that had been placed in the water to prevent the safe passage of ships. The second ship to be named Stalwart by the Navy, MSO-493, ex-AM-493, was laid down on 22 June 1954 by Broward Marine Shipbuilding Co. Inc., Fort Lauderdale, Florida, launched on 3 December 1955; sponsored by Mrs. Dante B. Fascelli; and commissioned on 23 April 1957, Lt. Comdr. E. F. McCarton in command.