Polyethylene warning buoy, water safety warning line, navigation beacon light

Polyethylene warning buoy water safety warning line navigation beacon, refers to a type of navigation mark floating on the water surface, anchored in a designated position, used to indicate the range of navigation channels, indicate shallow waters, obstacles, or indicate specialized water surface navigation aids. Buoys are the most numerous and widely used in navigation marks, and are set up in places where it is difficult or inappropriate to establish fixed navigation marks. Buoys are used to indicate shallow waters or obstacles that pose a threat to navigation safety. A buoy equipped with lighting fixtures is called a light buoy, which is used as a signal buoy to assist navigation in day and night navigable waters. Some buoys are also equipped with radar responders, radio beacons, fog warning signals, and marine survey instruments.