In a narrow channel, if an overtaking vessel intends to pass on the other vessel's port side, what signal would they sound?

When an overtaking vessel intends to pass another vessel on the port side in a narrow channel, the appropriate signal to sound is two prolonged blasts followed by two short blasts. This honking pattern indicates the overtaking vessel’s intention to pass to the left side of the vessel being overtaken.

In the context of navigation rules, especially in confined or narrow waters, it is essential for vessels to communicate their intentions clearly to avoid collisions. The use of sound signals is a crucial aspect of this communication. The first part of the signal, the two prolonged blasts, alerts the other vessel to the overtaking action, while the two short blasts specify the side on which the overtaking vessel intends to pass.

Understanding the proper use of sound signals is vital for safe navigation, especially in tricky situations like narrow channels where space is limited and maneuverability can be restricted. This specific signaling helps ensure both vessels are aware of the maneuver, promoting safety and cooperation on the water.