Scuba diving

Scuba diving

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

Industry: Sports

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Scuba diving

Open-water diving

Sports; Scuba diving

The recreational diving done in an environment other than a swimming pool but with no overhead obstacles; examples include lakes, ponds, rivers, oceans, quarries.

Archimedes principle

Sports; Scuba diving

Any object wholly or partly immersed in fluid will be buoyed up by a force equal to the weight of the fluid displaced by the object.

Requiring much specialised training and equipment, this involves diving into an overhead environment including caves, abandoned mines or quarries and natural springs or sinkholes where the exit is ...

Granny line

Sports; Scuba diving

Also known as a Gerry Line. A line which goes from the stern platform or hang bar to the anchor line.

Dive lights

Sports; Scuba diving

Specially designed underwater lights used for night, cave or wreck diving.

Dive computer

Sports; Scuba diving

Device that constantly measures depth and time, based on a pre-programmed algorithm, the computer calculates tissue nitrogen uptake and elimination in several theoretical compartments and provides a ...

Half time

Sports; Scuba diving

Half the time it takes for a dissolved gas in a tissue (such as nitrogen) to equilibrate to a new pressure, or to reach full saturation at a new pressure. Theoretical tissue half times are used in ...