Each cylinder or set of cylinders of the same breathing gas is fitted with a pressure gauge or equivalent system to indicate the pressure during the dive.
In the natural environment, each diver equipped with open circuit equipment is fitted with a compressed gas inflatable system enabling him or her to return to the surface and remain there.
In the natural environment, each supervised diver above 20 metres and each autonomous diver is equipped with :
– diving equipment enabling a team member to be supplied with breathing gas without sharing a mouthpiece ;
– equipment enabling them to monitor the personal characteristics of their dive and ascent.
In the open water, the person supervising the group is equipped with :
– diving equipment with two independent exits and two full regulators ;
– an inflatable system using compressed gas, enabling them to return to the surface and remain there;
– equipment to monitor the dive and ascent characteristics of the group.
In the natural environment, each group has its own stop chute.