What is the focus of Part B Section 3?

The focus of Part B Section 3 specifically addresses the conduct of vessels in restricted visibility. This section of the COLREGs outlines the responsibilities and maneuvers that vessels must adhere to when they are navigating in conditions where visibility is reduced, such as during fog, heavy rain, or other situations that limit the range of sight. The regulations emphasize the necessity for vessels to take precautionary measures to avoid collisions, which includes sound signals and other actions aimed at ensuring safe navigation.

This part is crucial because restricted visibility can significantly increase the risk of accidents. The regulations establish protocols for vessels to follow, including reducing speed, maintaining a proper lookout, and sounding appropriate signals to alert other nearby vessels of their presence. Understanding these rules is essential for mariners to operate safely in challenging conditions.