In the context of navigation rules, which vessels are included in Rule 6?

Rule 6 of the International Regulations for Preventing Collisions at Sea (COLREGs) addresses the responsibility of all vessels to maintain a proper lookout by sight and hearing, as well as assessing any other relevant factors. The significance of this rule lies in its applicability to all vessels—regardless of type or purpose—which means that it encompasses commercial vessels, fishing vessels, recreational craft, and any other categories of vessels navigating in the water.

This rule underscores a fundamental principle in maritime safety, emphasizing that maintaining a proper lookout is critical in all situations to prevent collisions and ensure safe navigation. By including all vessels within this rule, it reinforces the shared responsibility among all mariners to be vigilant and aware of their surroundings, enhancing safety across the board. As such, Option A accurately reflects the comprehensive nature of Rule 6 and its intent to foster a safer navigation environment for everyone operating any type of vessel.