BOTH INTERNATIONAL & INLAND A head-on situation at night occurs when you can see which light(s)?

Correct Answer: Option B — both sidelights of a vessel dead ahead of you

Rule 14(b) states a head-on situation exists when a vessel sees another ahead and sees both sidelights. This visual cue indicates the other vessel is approaching on a reciprocal course, triggering the requirement under Rule 14(a) for both vessels to alter course to starboard to pass port-to-port.