BOTH INTERNATIONAL & INLAND If a sailing vessel with the wind on the port side sees a sailing vessel to windward and cannot tell whether the other vessel has the wind on the port or starboard side, which action shall she take?

Correct Answer: Option C — keep out of the way of the other vessel

Rule 12(a)(ii) states that a sailing vessel with the wind on the port side which sees another vessel to windward and cannot determine if the other has the wind on the port or starboard side shall keep out of the way. This ensures safety when the relative wind is ambiguous.