What is the primary purpose of Rule 9 concerning narrow channels?

The primary purpose of Rule 9 concerning narrow channels is to prevent collisions in these specific areas. Narrow channels create particular navigational challenges due to their restricted width, which can lead to situations where vessels may encounter difficulties in safely passing one another. The rule provides guidelines for vessels operating in these areas, including rules about safe navigation, responsibilities of vessels to avoid collisions, and conduct when approaching or in a narrow channel.

This focus on collision prevention is critical, as narrow channels can limit a vessel's ability to maneuver and increase the risk of accidents if vessels do not adhere to appropriate conduct. Therefore, adhering to Rule 9 helps ensure that all vessels can navigate safely, reducing the likelihood of incidents in these potentially hazardous spaces.