BOTH INTERNATIONAL & INLAND You are on a 15-meter vessel "A" in a narrow channel as shown in illustration D032RR below. Vessel "B", a large tanker which can safely navigate only within the channel, sounds five short and rapid blasts. What action should you take?

Correct Answer: Option B — Not impede the passage of vessel "B"

Rule 9(b) dictates 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. Vessel "A" must immediately take action to clear the channel.