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18 ■ Chapter 3 Western Rivers System This system of markers is used on the Mississippi River and its tributaries above Baton Rouge, Louisiana, and on some other rivers that flow toward the Gulf of Mexico. The major difference from the U.S. Aids to Navigation System lateral markers shown on the previous page is that navigation markers on the Western Rivers System are not numbered. Numbers displayed below daymarks along this system are not associated with the right or left side of the channel; these numbers indicate the distance from the river's mouth (except on the Ohio River where the numbers indicate the distance from the headwaters). Non-Lateral Markers Non-lateral markers are navigation aids that give information other than the edges of safe water areas. The most common are regulatory markers that are white and use orange markings and black lettering. These markers are found on lakes and rivers and are used to: ◆ Give directions and information. ◆ Warn of hazards and obstructions. ◆ Mark controlled areas. ◆ Mark exclusion (closed) areas. Information Squares provide information such as places to find food, supplies, and repairs; and they give direc- tions, distances, and other non-regulatory information. Danger Area Diamonds warn of dangers such as rocks, shoals, construction, dams, or stumps. Always proceed with caution and keep a safe distance. Never assume that every hazard will be marked by a buoy. Controlled Area Circles indicate a controlled area such as no wake, idle speed, speed limit, or ski zone. Exclusion Area Crossed diamonds indicate areas off-limits to all vessels such as swimming areas, dams, and spillways. Other Non-Lateral Markers Mooring Buoy: These are white with a blue horizontal band. They usually are placed in marinas and other areas where vessels are allowed to anchor. These are the only buoys you may tie up to legally. Safe Water Marker: These are white with red vertical stripes and indicate unobstructed water on all sides. They mark mid-channels or fairways and may be passed on either side. Inland Waters Obstruction Marker: These are white with black vertical stripes and indicate an obstruction to navigation. You should not pass between these buoys and the nearest shore. Western Rivers System Marker On the Western Rivers System, this daymark indicates the right side of the channel as a boater heads upstream. The number below the marker indicates that the boater is 73.5 miles from the river's mouth. Copyright © 2014 Boat Ed, www.boat-ed.com

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