Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. It is also often referred to as diving, an ambiguous term with several
Surface-supplied divers riding a stage to the underwater workplace
Mild barotrauma to a diver caused by mask squeeze
Views through a flat mask, above and below water
Two very different modes of diving: Ambient pressure open circuit scuba diving (left) and atmospheric pressure diving in a pressure resistant suit (right)
Scientific diving is the use of underwater diving techniques by scientists to perform work underwater in the direct pursuit of scientific knowledge. The legal definition of scientific diving varies by
A scientific diver at work
A cave diver running a distance line into the overhead environment to facilitate a safe exit
US Navy diver training in the use of a hand held sonar device
Measuring the size of gorgonians along a transect in a coral reef of Bermuda.