Which COLREGS Rule defines the action to avoid collision once risk is identified?

• A. Rule 5 – Lookout
• B. Rule 9 – Narrow Channels
• C. Rule 13 – Overtaking
• D. Rule 8 – Action to Avoid Collision

Answer: (D)

The essential idea here is that, once you identify a risk of collision, you must take decisive, early action to avoid it. This is provided by the rule titled Action to Avoid Collision. It requires you to make a positive change in either your course, your speed, or both, in a timely and prudent manner to keep a safe passing distance from other vessels. The maneuver should be clear and executed with enough maneuvering room, and you should continue to monitor the situation as it evolves.

Lookout helps you detect risks, but it doesn’t prescribe the actual avoidance maneuver. Narrow Channels governs behavior in restricted waterways, not the general avoidance of a collision. Overtaking covers a specific scenario where one vessel is approaching from behind, which isn’t the universal instruction for avoidance after risk is identified. So the rule that directly tells you how to act to avoid collision when risk is identified is the one that requires you to take early and positive action, such as changing course or reducing speed.