USS Leader (MSO-490)
 USS Leader (AM-490/MSO-490) 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.Leader (AM-490) was laid down by J. M. Martinac Shipbuilding Corp. Tacoma Washington 22 September 1953; launched 15 September 1954; sponsored by Mrs. Norman Wordlund; reclassified MSO-490 7 February 1955 and commissioned 16 November 1955 Lt. Comdr. Harvey E. Toponce in command.