Which rule defines the responsibility to avoid collisions?

The responsibility to avoid collisions is articulated in Rule 2 of the COLREGs. This rule emphasizes the general obligation of vessels to navigate in a way that avoids collisions at sea. It underlines the principle of good seamanship and requires mariners to take all necessary precautions to ensure safety, which can include altering course or speed as deemed appropriate in various situations.

This rule highlights that the responsibility to avoid collisions is paramount and is a foundational concept within the COLREGs framework. It serves as a reminder that, irrespective of the other specific rules, all vessels must prioritize the avoidance of collisions through vigilant operation and appropriate responses to prevailing conditions.

While other rules, such as Rule 5, which covers look-out, and Rule 4, which deals with the conduct of vessels in restricted visibility, contribute to the overall prevention of collisions, they are based on the fundamental principle established in Rule 2. Rule 3 defines terminology found throughout the regulations and does not relate directly to responsibilities. Thus, Rule 2 is recognized as the key guideline for the responsibility to avoid collisions at sea, making it the correct choice in this context.