BOTH INTERNATIONAL & INLAND A power-driven vessel has on her port side a sailing vessel which is on a collision course. What action is the power-driven vessel required to take?

Correct Answer: Option C — keep clear

Rule 18(a)(iv) establishes that a power-driven vessel underway shall keep out of the way of a sailing vessel. Regardless of the relative bearing, the power-driven vessel is the burdened vessel and must take early and substantial action to keep clear of the sailing vessel's path.