BOTH INTERNATIONAL & INLAND You are on Vessel "A" engaged in fishing in a narrow channel as shown in illustration D037RR below. Vessel "B" is a tanker proceeding in the channel. Vessel "B" 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 engaged in fishing shall not impede the passage of any other vessel navigating within a narrow channel. The five short and rapid blasts signal doubt as to the fishing vessel's intentions, requiring the fishing vessel to immediately clear the channel for the tanker.