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Naval Base Point Loma, Calif. (Jan. 10, 2006) - The crew of the floating dry-dock, ARCO (ARDM-5), use mooring lines to pull the Los Angeles-class fast-attack nuclear submarine USS Helena (SSN 725) into the dry-dock. Helena is entering dry-dock for routine scheduled maintenance. U.S. Navy photo by Journalist Seaman Joseph Caballero