Underwater Diving

Underwater diving is the practice of going underwater, either with breathing apparatus (scuba diving and surface supplied diving) or by breath-holding (freediving).

Recreational diving is a popular activity (also called sports diving or subaquatics). Professional diving (commercial diving, diving for scientific research purposes or diving for financial gain) takes a range of diving activities to the underwater work site.

Training, types of equipment used and breathing gases used depend on the type of diving.

Underwater diving includes Free-diving, Scuba diving, Surface-supplied diving, Saturation diving, and diving in Atmospheric diving suits.

• Freediver with monofin, ascending.

• Recreational scuba diver

• Surface supplied diver riding a stage to the underwater workplace.

• Closed bell used to transfer saturation divers from the workplace to the hyperbaric life support system.

• US Navy Atmospheric Diving System (ADS)