According to the rules on narrow channels, what is advised against?

Anchoring in narrow channels is generally advised against because it poses significant safety risks to navigation. Narrow channels are typically designed for the passage of vessels, and anchoring in such areas can obstruct the waterway, preventing the safe transit of other vessels. This can lead to collisions or grounding, especially in busy waterways where boats may have limited space to maneuver.

When vessels are anchored in narrow channels, they may not be visible to approaching traffic, increasing the risk of accidents. Furthermore, the environmental conditions within narrow channels, such as currents and wind, can affect the stability of an anchored vessel, making it more prone to drifting. Also, emergency situations may arise where swift movement is necessary; having an anchored vessel can hinder such responses.

In contrast, keeping to the center of the channel, maintaining a constant speed, and passing other vessels closely, while they have specific guidelines associated with them, do not inherently carry the same risk of obstruction and potential danger as anchoring does. Thus, the recommendation against anchoring is primarily focused on ensuring safe navigation and minimizing the risk of accidents in confined waterways.