BOTH INTERNATIONAL & INLAND When navigating in restricted visibility, what action shall a power-driven vessel take?

Correct Answer: Option A — have her engines ready for immediate maneuver

Rule 6(a) requires every vessel to proceed at a safe speed at all times. Rule 19(b) specifically mandates that every vessel shall have her engines ready for immediate maneuver when navigating in or near an area of restricted visibility, regardless of the vessel's type or propulsion method.