What restriction applies to vessels less than 20m in length when navigating a narrow channel?

Vessels less than 20 meters in length have a special consideration when navigating narrow channels, which is to ensure that they do not impede the safe passage of larger vessels that are inherently constrained by the channel's width and characteristics. The International Regulations for Preventing Collisions at Sea (COLREGs) emphasize that all vessels must take action to avoid causing danger to others, particularly larger vessels that may have limited options for maneuvering.

Narrow channels present unique navigational challenges, and larger vessels, due to their size and maneuverability constraints, often rely on the ability to proceed without interruption. Therefore, smaller vessels must exercise caution and give way to these larger vessels. This principle helps maintain safety, prevents collisions, and ensures that the navigation of all vessels can proceed smoothly.

While smaller vessels have some flexibility, such as altering course within the context of safety, they must be conscious of their actions and prioritize the safety of larger ships navigating in confined waters. This is why the requirement to avoid impeding larger vessels is crucial and reflects the importance of safe navigation in narrow channels.