What is the primary focus of rules 4-10 in the COLREGs?

The primary focus of rules 4-10 in the COLREGs is indeed the conduct of vessels in any condition of visibility. These rules provide essential guidance for mariners to follow to ensure safe navigation and reduce the risk of collisions on the water, regardless of visibility conditions.

Rule 4 establishes the general responsibilities of all vessels, requiring them to take action to avoid collisions under any circumstances. Rule 5 emphasizes the need for vessels to maintain a proper lookout by sight and hearing as well as by all available means appropriate in the prevailing circumstances and conditions. Rule 6 discusses safe speed, encouraging vessels to navigate at a speed that allows for effective action to avoid collisions. Rule 7 outlines risk of collision, highlighting the importance of assessing whether such a risk exists, while Rule 8 addresses action to avoid collision, emphasizing that vessels should take positive steps to avoid collision and outlines various measures for doing so. Rule 9 pertains to narrow channels and the conduct of vessels therein, and Rule 10 focuses on vessels navigating in areas with traffic separation schemes.

In this context, these rules collectively cater to the broad spectrum of visibility conditions, making it essential for mariners to understand them as they ensure safe navigation on the water in various circumstances, not limited solely