BOTH INTERNATIONAL & INLAND Of the vessels listed, which must keep out of the way of all the others?

Correct Answer: Option D — A sailing vessel

Rule 18 establishes the hierarchy of vessels. A sailing vessel is at the bottom of the hierarchy compared to NUC, RAM, and fishing vessels. Therefore, a sailing vessel must keep out of the way of all those listed, as they are all higher in the hierarchy of maneuverability.