Which maneuver should a vessel perform when it is overtaking another vessel?

When a vessel is overtaking another vessel, the correct maneuver is to pass on the port side, unless otherwise indicated. This is based on the established rules of navigation that promote safety and predictability on the water. The convention in international waters and many jurisdictions is that vessels passing each other generally do so on the port side. This practice ensures that both vessels are following a common approach, reducing the risk of collisions and confusion.

In most situations, overtaking vessels are responsible for maintaining their course and speed unless they need to alter their course to safely pass the other vessel. Passing on the starboard side is less common and may not follow the standard established norms, hence it is not considered the best practice unless specific circumstances dictate otherwise. By passing on the port side, the overtaking vessel can more easily maneuver safely while also allowing the vessel being overtaken to predict the path of the overtaking vessel.

Therefore, the guiding principle is to adhere to these standard maneuvers to ensure safety and compliance with navigational rules.