INTERNATIONAL ONLY What characteristic must a light used to indicate passing intentions poses?
Official USCG Answer & Rule Citation
Correct Answer: Option C — It must be an all-round white light
COLREGS Rule 34(b) specifies that when vessels are in sight of one another and a light is used to supplement whistle signals, it must be an all-round white light. This light must be visible for at least 5 miles and have a flash duration of about one second.
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