459. Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.

Information regarding breakdowns, repairs, or emergency operations affecting weirs and wicket dams on western rivers is disseminated via Broadcast Notice to Mariners, a real-time Coast Guard broadcast designed for urgent and temporary conditions, unlike periodically updated publications such as the Light List, Sailing Directions, and U.S. Coast Pilot.