On which side should power-driven vessels typically pass each other?

Answer: B — Port side

Power-driven vessels should typically pass each other on the port side, which is the left side of the vessel when facing forward. This rule helps establish a common understanding and ensures that vessels can navigate safely and predictably in close quarters. When two vessels are approaching head-on or nearly so, they are expected to alter their paths to pass each other with port sides facing. This reduces the risk of collisions because it allows for a standard approach maneuver. This practice is consistent with the overall principles found in the COLREGs, which prioritize safety and predictability in marine navigation. In contrast, while vessels can agree to pass on either side under certain conditions, this is not the standard protocol and can introduce confusion if not communicated effectively. The idea is to have a clear set of guidelines that everyone follows to enhance safety on the water.