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Non-lateral markers give information other than the edge of safe water areas. Here are some examples of non-lateral markers.

Square buoy icon for directions and information


Orange squares indicate places to find food, supplies, and repairs.

Diamond buoy icon warning of danger

Danger Area

Orange diamonds warn of dangers such as rocks, shoals, construction, dams, or stumps.

Circular buoy icon for marking controlled areas

Controlled Area

Orange circles indicate restrictions such as no wake, idle zone, or speed limit.

Crossed diamond buoy icon for marking off-limits or closed areas

Exclusion Area

Orange crossed diamonds indicate that an area is off-limits to all vessels.