10 Terms
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Scuba diving
Underwater diving in which the diver uses scuba gears to breathe underwater.
Industry: Sports
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Scuba diving
live aboard
Sports; Scuba diving
A dive boat with sleeping and eating accommodations. Commercial live aboard boats are usually between 50 and 130 feet long, and can carry from 10 to 30 divers for up to a week or more.
unbalanced regulator
Sports; Scuba diving
An unbalanced first stage regulator is affected by tank pressure. The tank pressure works to force the piston in the first stage open. As the gas in the tank diminishes, it is easier for the piston ...
enriched air nitrox (EAN)
Sports; Scuba diving
A N2/O2 (nitrogen/oxygen) breathing gas containing more oxygen (typically 32 or 36 percent) and less nitrogen than plain air. Used by recreational divers to increase either bottom time or safety ...
eddy
Sports; Scuba diving
A circular movement of water, in a comparatively limited area, formed on the side of a main current; may be created at a point where the mainstream passes a projection or meets an opposite current.
ambient light
Sports; Scuba diving
It is the available sunlight underwater used as a source of illumination.
hang tank
Sports; Scuba diving
An extra tank, ideally of deco mix, staged at the decompression stop. Normally found at the rear of a dive boat in case of emergencies.
asthma
Sports; Scuba diving
A common condition manifested by narrowing of air passages within the lungs. One reason for the narrowing is excess mucous in the airway.
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