. "1974-08-01"^^ . . "1974-08-01"^^ . "775"^^ . . . "unknown" . . "1121282565"^^ . "1971-07-01"^^ . . "Spain"@en . "USS Persistent (AM-491/MSO-491) 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 Persistent by the Navy, MSO\u2013491 was laid down 17 June 1954 as AM491 by J.M. Martinac Shipbuilding Corp., Tacoma, Washington; reclassified MSO\u2013491 on 7 February 1955; launched 23 April 1955; sponsored by Mrs. M.S. Erdahl; and commissioned 3 February 1956."@en . "1954-06-17"^^ . . . . . . "1956-02-03"^^ . "USS Persistent (AM-491)"@en . . . . . . . "74"^^ . "1974-08-01"^^ . . . . . . . . . . "52425.6"^^ . "Guadalquivir (M43)"@en . . "4417"^^ . "--08-01"^^ . "Sold to Spain, 1 August 1974" . . . "yes"@en . . . "15"^^ . . . . . . . . . . . "52.4256"^^ . . "1"^^ . . . . . "13445710"^^ . . . . . . "Guadalquivir"@en . . "USS Persistent (AM-491/MSO-491) 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 Persistent by the Navy, MSO\u2013491 was laid down 17 June 1954 as AM491 by J.M. Martinac Shipbuilding Corp., Tacoma, Washington; reclassified MSO\u2013491 on 7 February 1955; launched 23 April 1955; sponsored by Mrs. M.S. Erdahl; and commissioned 3 February 1956."@en . . . "1971-07-01"^^ . . "unknown"@en . "1956-02-03"^^ . . "USS Persistent"@en . . "1955-04-23"^^ . . . . . . "--02-07"^^ . . . . . "1955-04-23"^^ . . . . . . . . "United States"@en . "1954-06-17"^^ . . . . . "10.9728"^^ . . "USS Persistent (MSO-491)"@en . . . . . . .