What is the minimum length of an anchored vessel required to show a white light both forward and aft?

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Multiple Choice

What is the minimum length of an anchored vessel required to show a white light both forward and aft?

Explanation:
When a vessel is at anchor, she must display a white light to indicate her presence. The rules also set a threshold for how many lights to show based on length: smaller anchored vessels can meet the requirement with a single all-round white light, but once a vessel is 50 meters or longer, she must show two white lights—one toward the bow (forward) and one toward the stern (aft)—so other vessels can better judge the vessel’s length and orientation at night. That is why the minimum length requiring lights forward and aft is 50 meters.

When a vessel is at anchor, she must display a white light to indicate her presence. The rules also set a threshold for how many lights to show based on length: smaller anchored vessels can meet the requirement with a single all-round white light, but once a vessel is 50 meters or longer, she must show two white lights—one toward the bow (forward) and one toward the stern (aft)—so other vessels can better judge the vessel’s length and orientation at night. That is why the minimum length requiring lights forward and aft is 50 meters.

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