Diving Girl

Surface supplied diving
The alternative to scuba is breathing gases supplied via an umbilical from the surface, often from a diving support vessel but sometimes, indirectly via a diving bell. Surface-supplied divers almost always wear diving helmets or full face diving masks. An alternative to SCUBA diving, called "SNUBA" or "hooka" diving, has the diver supplied via an umbilical from a small cylinder or compressor on the surface. It is popular for light work such as hull cleaning, and also as a tourist activity for those who are not SCUBA-certified.
• Saturation diving
Saturation diving lets professional divers live and work at depth for days or weeks at a time. This type of diving allows greater economy of work and enhanced safety. After working in the water, divers rest and live in a dry pressurized habitat on or connected to a diving support vessel, oil platform or other floating work station, at the same pressure as the work depth. They may be transferred in a diving bell. Decompression at the end of the dive may take many days.