Scuba diving

Scuba diving

Underwater diving in which the diver uses scuba gears to breathe underwater.

Industry: Sports

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Scuba diving

backscatter

Sports; Scuba diving

When suspended particles in the water, such as sand, are illuminated by light from a flash, they reflect the light back to the lens. The particles appear as specks or snow in the photo.

course director (CD)

Sports; Scuba diving

Level of instructor certification authorized to conduct instructor training.

air compressor

Sports; Scuba diving

A machine that compresses or pressurizes air; for scuba purposes, air is compressed from the atmospheric level (14. 7 psi at sea level) to the capacity of the tank, usually between 2500-3000 psi.

alternate air source

Sports; Scuba diving

A device a diver can use in place of the primary regulator, in order to make an ascent while still breathing normally.

air consumption

Sports; Scuba diving

The depletion of breathing gas by a diver during the course of a dive.

The condition characterized by bubble(s) of air from a ruptured lung segment under pressure; the bubbles enter the pulmonary circulation and travel to the arterial circulation, where they may cause a ...