BOTH INTERNATIONAL & INLAND The Navigation Rules state that a vessel shall be operated at a safe speed at all times so that she can be stopped within __________.

Correct Answer: Option D — a distance appropriate to the existing circumstances and conditions

Rule 6 defines safe speed as a speed that allows a vessel to take proper and effective action to avoid collision and be stopped within a distance appropriate to the prevailing circumstances and conditions, such as visibility, traffic density, and the maneuverability of the vessel.