First-ever buoy to feature a built-in flag, it is fitted with a specially designed casing for the line that prevents the line from tangling up and makes it possible to adjust its length as a function of how deep you want to go. Pursuant to the regulations, its prevailing colour is red with a white stripe for immediate recognisability. Also red in colour, the line is about 20m long and is fitted with two plastic snap hooks. This buoy comes with a convenient whistle: an additional safety device that can be used to attract attention in an emergency situation