What is one of the signals for a vessel that is not moving?

A vessel that is not moving uses specific sound signals to communicate its status to other vessels, especially in situations where visibility might be limited. One of the standard signals for a vessel at anchor, which is considered to be "not moving," is two prolonged blasts every two minutes.

This signal serves to indicate to other vessels that there is a stationary object in the water, thereby helping to prevent collisions. The prolonged blasts are designed to be easily recognizable and distinguishable from other sound signals used on the water.

Using two prolonged blasts every two minutes ensures that the signal is clear and can be effectively heard by nearby boaters, keeping maritime traffic safe and aware of the stationary vessel's presence. Understanding these sound signals is crucial for safe navigation and is an important part of boating regulations and safety practices.