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- Q397 - Navigation General: Rivers
85. In illustration D045NG below, which shape is a daymark warning of danger?
Shape B is correct; the diamond shape signifies a danger area according to the U.S. Aids to Navigation System. Regulatory daymarks use specific geometric symbols on white backgrounds, and a diamond indicates danger, such as rocks, shoals, or wrecks. Other shapes represent information, directions, or specific lateral aids, not danger warnings.
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