Which of the following actions is required by any vessel navigating a narrow channel?

Maintaining a safe distance from other vessels is essential when navigating a narrow channel due to the limited space and increased risk of collision. Narrow channels often have specific navigational hazards and may be heavily trafficked, requiring vessels to be vigilant and considerate of the proximity to other vessels. This action is supported by the Rules of the Road, which emphasize the importance of safe navigation practices to prevent accidents.

In narrow channels, it is crucial for vessels to manage their speed and maneuverability while being aware of the size and capabilities of nearby vessels. This ensures that each vessel can react appropriately to avoid collisions and maintain safe passage.

The other options, while addressing aspects of navigation, do not adequately represent the key requirement of maintaining a safe distance from other vessels, which is critical for ensuring safety while navigating through confined waters.