INLAND ONLY You are in charge of a power-driven vessel crossing on the Western Rivers. You must keep out of the way of which vessel?

Correct Answer: Option D — All of the above

Rule 9(d) (Inland) states that a vessel shall not cross a narrow channel if such crossing impedes the passage of a vessel which can safely navigate only within that channel. On Western Rivers, this applies to all vessels, including sail, that might obstruct the fairway for larger traffic.