BOTH INTERNATIONAL & INLAND Your 15-meter vessel is crossing a narrow channel and a large cargo vessel to port is within the channel and crossing your course. What action must you take?

Correct Answer: Option C — not cross the channel if you might impede the other vessel

Rule 9(b) explicitly states that a vessel of less than 20 meters in length or a sailing vessel shall not impede the passage of a vessel which can safely navigate only within a narrow channel or fairway. Crossing must not occur if it risks impeding the larger vessel's transit.