The buoy system was established to delimit navigable channels, signal obstacles to navigation and help the navigator.
It comprises six types of different signals that can be used in combination.
Side signs.
Danger signs isolated.
Signs of new dangers.
Signs of safe waters.
Special signs
Cardinal signs.
However, it is very important to know how to identify them by their shapes, colors and lights.
Red color:
SIDE SIGNS
SIGNS OF BABOR, ENTERING A CHANNEL