BOTH INTERNATIONAL & INLAND You are approaching a narrow channel. Another vessel in the channel can only be navigated safely in that channel. You should __________.

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

Rule 9(b) strictly prohibits any vessel from crossing a narrow channel or fairway if such crossing impedes the safe passage of another vessel that can safely navigate only within that channel. Mariners must yield right-of-way.