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Conditions considered temporary reasons to suspend diving activities: Pregnancy—It is unlikely that literature research can establish the effect of scuba diving on the unborn human fetus as there is insufficient data, and women tend to comply with the diving industry recommendation not to dive while pregnant. [50]
Physical conditions of the water or other diving medium influence the safety and practicability of a dive and can affect the choice of equipment used. These include motion of the medium, visibility and illumination, temperature, and pressure. These conditions are affected by weather, season and climate. [30] [31]
Diving disorders are medical conditions specifically arising from underwater diving. The signs and symptoms of these may present during a dive, on surfacing, or up to several hours after a dive. The principal conditions are decompression illness (which covers decompression sickness and arterial gas embolism ), nitrogen narcosis , high pressure ...
The temperature of the diving environment can influence the equipment used by the diver, and the time the diver can be exposed to the environment without excessive risk. Diving in hot water – Diving in conditions where active cooling is necessary; Diving in warm water – Diving in conditions where no thermal protection is needed
Technical diving is a form of recreational diving under more challenging conditions. Professional diving (commercial diving, diving for research purposes, or for financial gain) involves working underwater. Public safety diving is the underwater work done by law enforcement, fire rescue, and underwater search and recovery dive teams.
In 1998 the Recreational Scuba Training Council listed "a history of panic disorder" as an absolute contraindication to scuba diving, but the 2001 guideline specifies "a history of untreated panic disorder" as a severe risk condition, which suggests that some people who are being treated for the condition might dive at an acceptable level of risk.
The term dive site (from "dive" and "site", meaning "the place, scene, or point of an occurrence or event" [1]) is used differently depending on context.In professional diving in some regions it may refer to the surface worksite from which the diving operation is supported and controlled by the diving supervisor.
The human physiology of underwater diving is the physiological influences of the underwater environment on human divers, and adaptations to operating underwater, both during breath-hold dives and while breathing at ambient pressure from a suitable breathing gas supply.