What must be done when approaching another vessel in a narrow channel?

When approaching another vessel in a narrow channel, the primary concern is ensuring safe navigation and avoiding collisions. Being prepared to change course to avoid a collision is essential because narrow channels often restrict the maneuvers available to vessels due to limited space. In such situations, maintaining a course without regard for the other vessel can lead to dangerous scenarios, especially if either vessel is unable to maneuver effectively.

In a narrow channel, where boat traffic is often more congested and visibility can be limited, it is crucial for vessels to be vigilant and ready to take action to avoid a collision. This may include adjusting speed or altering course as necessary based on the movements of other vessels.

While slowing down, sounding signals, and maintaining speed may all be relevant to navigation in some contexts, the most critical action is to be prepared to change course swiftly and safely to prevent an accident.