BOTH INTERNATIONAL & INLAND Which is a requirement for a vessel approaching a narrow channel?

Correct Answer: Option D — avoid crossing the channel if it impedes another vessel navigating in the channel

Rule 9(d) explicitly states that a vessel shall not cross a narrow channel or fairway if such crossing impedes the passage of a vessel which can safely navigate only within such channel or fairway. The vessel crossing must yield to the vessel constrained to the channel's navigable limits.