Question 392Navigation General

70% to pass

Restricted areas at locks and dams are indicated by _______________.

A signs and/or flashing red lights
B yellow unlighted buoys
C red daymarks upstream and green daymarks downstream
D flashing red lights upstream and fixed red lights downstream
AI Explanation

The correct answer is A) signs and/or flashing red lights. Restricted areas at locks and dams are indicated by signs and/or flashing red lights, as per the U.S. Coast Guard regulations. These visual aids clearly mark the boundaries of the restricted area, which mariners must avoid or enter with caution. The other answer choices do not accurately represent the markings used to denote restricted areas around locks and dams.

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Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG National Maritime Center
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