BOTH INTERNATIONAL & INLAND A "head-on" situation shall be deemed to exist at night when which of the conditions are met?

Correct Answer: Option B — both sidelights and masthead light(s) are visible

Rule 14(b) defines a head-on situation at night as one where a vessel sees the other ahead and sees the masthead lights in a line or nearly in a line and/or both sidelights. This visual configuration confirms the vessels are on reciprocal or nearly reciprocal courses.