The green markings generally indicate the left-hand side of the fairway (when traveling towards land).
The red markings, on the other hand, are located on the right-hand side of the fairway and are usually cylindrical or conical in shape.
In Brittany, these markings also have a special aesthetic significance, as they form a striking contrast to the natural surroundings in the rugged, sometimes fog-covered coastal landscape. They give the coastal regions a unique visual charm, especially on the rocky islands, where they are perceived as a symbol of the connection between nature and technology.