Rule of thirds

Rule of thirds

An air management technique. Use a third of the tank to get to your destination, a third to get back, and the last third belongs to your buddy in case of an emergency.

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Part of Speech: noun
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Industry/Domain: Sports
Category: Scuba diving
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rule of thirds

Sports; Scuba diving

An air management technique. Use a third of the tank to get to your destination, a third to get back, and the last third belongs to your buddy in case of an emergency.

immersion hypothermia

Sports; Scuba diving

The lowering of body temperature when a diver is fully immersed in cold water without proper thermal protection.

hookah

Sports; Scuba diving

A surface-supplied compressed air apparatus, for use in shallow diving in calm waters. The air is delivered to one or more divers through a long hose.

rebreather

Sports; Scuba diving

A closed-circuit system which filters exhaled air, then recirculates it for rebreathing by the diver; requires special training and maintenance.

high pressure nervous syndrome (HPNS)

Sports; Scuba diving

A condition which results from breathing Helium under high pressures. Early symptoms of HPNS are sometimes seen as shallow as 300FSW but more commonly over 600FSW. The severity ...

breath-hold diving

Sports; Scuba diving

Diving without life support apparatus, while holding one's breath.

windward

Sports; Scuba diving

A point or side from which the wind blows; in the direction from which the wind blows; as opposed to, leeward.

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