What should vessels do when approaching a bend in a narrow channel?

When approaching a bend in a narrow channel, vessels should follow the sound signals laid out in Rule 34 of the COLREGs. This rule is particularly important in confined waters, as visibility can be limited and sound signals help to communicate vessel positions to each other.

As vessels approach such areas, the risk of collision increases due to the restricted visibility created by the bend. Utilizing sound signals, such as blasts of the horn, allows vessels to indicate their presence and intentions effectively. This communication is crucial for ensuring that all vessels can navigate safely around the bend and avoid accidents.

While other choices may seem reasonable, they do not address the critical need for communication in this situation. Visual signals may not be effective in reducing the risks presented by a tight turn in a narrow channel. Reducing speed and maintaining a safe distance can be prudent but do not replace the need for signaling intentions to other vessels. Maintaining the same course and speed may lead to confusion or collision if other vessels are unaware of your movements. Thus, following Rule 34 and using sound signals is the proper and safest approach when approaching a bend in a narrow channel.