BOTH INTERNATIONAL & INLAND A vessel nearing a bend or an area of a channel or fairway where other vessels may be hidden by an obstruction shall take which action?

Correct Answer: Option C — Sound a prolonged blast

Rule 9(f) and Rule 34(e) mandate that a vessel nearing a bend or area where other vessels may be obscured shall sound one prolonged blast. This signal serves as an audible warning to alert any approaching vessels that may be hidden by the obstruction, requiring an immediate answering blast.