In a narrow channel, how should you proceed when overtaking a vessel of less than 20m in length?

When overtaking a vessel of less than 20 meters in length in a narrow channel, the best course of action is to sound a warning and overtake with caution. This approach ensures that you are alerting the other vessel to your intentions, which is crucial for maintaining safety in constrained waters where maneuverability may be limited.

The Colregs (International Regulations for Preventing Collisions at Sea) emphasize the need for vessels to communicate their presence and intentions, especially when overtaking, to prevent misunderstandings that could lead to collisions. Sounding a warning signals to the smaller vessel that you plan to pass, allowing the crew to prepare accordingly, whether that means altering their course, speed, or simply being aware of your position.

By overtaking with caution, you also demonstrate responsible seamanship, taking into account the potential for the smaller vessel to be affected by your wash or wake, as well as allowing for any unexpected reactions from their crew. This method enhances overall safety for both vessels in the narrow channel.