Which COLREGs rule defines Safe Speed?

• A. Rule 6: Safe Speed
• B. Rule 5: Look-out
• C. Rule 8: Action to Avoid Collision
• D. Rule 11: Vessels in Sight

Answer: (A)

Safe Speed is defined in Rule 6. It means you must proceed at a speed that allows proper and effective action to avoid collision and to be able to stop within a distance appropriate to the prevailing circumstances. The speed isn’t a fixed number; it should be adjusted for factors like visibility, traffic density, weather and sea state, the vessel’s maneuverability and stopping capability, and the amount of maneuvering room you have. The point is to keep enough time and space to observe, assess, and respond to any potential risk. For example, in fog or crowded waters you slow down so you can see and identify other vessels in time and take early, decisive action if needed. This concept works together with Look-out (you need a good lookout to judge conditions) and with Action to Avoid Collision (you must be able to take timely action). It’s not about what you can see or say about vessels in sight; it’s about choosing a speed that keeps you safe given the current situation.