Abstract: Self-contained diving equipment comprising means (10) for refilling a compressed air tank (40) connected via a flexible air tube (1) to a snorkel and a breathing nozzle (70). The refilling means are deactivated when underwater, and an external air intake (61) is connected via a tube to the nozzle to feed air directly from the surface (10) when the swimmer is not underwater. The equipment further comprises a moisture removal device (20) and a filter (21) between the compressor (13) and the tank (40), as well as means (30) for controlling the activation and deactivation of the refilling means.

Abstract: Breathing apparatus for diving of the type comprising a breathing bag (13), a mouthpiece (30), inhaling and exhaling ducts (16 and 17) connected to the bag and to the mouthpiece these inhaling and exhaling ducts being respectively provided with inhaling and exhaling non return valves (18 and 19), and a so called "drainage" device. The apparatus further comprises a device (22) for measuring the volume of inhaled and exhaled gas. The draining device comprises a switching means (21) which, in so called "operating" position, is adapted to direct the flow towards the exhaling valve (19), and in so called "non operating" position is adapted to direct the exhaled flow towards an outlet drain (23).