Every vessel should at all times proceed at a 'safe speed'. 'Safe speed' is defined as that speed where

• A. you can take proper and effective action to avoid collision
• B. The speed that keeps you on course
• C. The speed to maximize distance from others
• D. The speed that ensures you reach the next waypoint first

Answer: (A)

Safe speed means the speed at which you can take proper and effective action to avoid collision. This is the practical measure because your ability to stop, maneuver, or adjust course depends on how fast you’re going and the conditions around you. Factors like visibility, traffic density, weather and sea state, your vessel’s maneuverability, and stopping distance all shape what speed lets you respond in time to prevent a collision. If you go faster than what allows timely action, you may not have enough time to react even if you’re technically on a good track, which is why this definition emphasizes your capacity to avoid another vessel. The other ideas—staying on a particular course, maximizing distance, or rushing to reach a waypoint—don't guarantee safety and don’t reflect the need for time to take evasive action.