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Physical restraint from entering danger zone by way of limited umbilical length and underwater tending. Remain above chain at all times when near pinch zone if necessary to work in the area. Avoid diving near chains when weather conditions are likely to cause lifting. Avoid diving near chains in low visibility.
Underwater construction is associated with many of the usual hazards of a construction site, complicated by visibility and communication difficulties. Oxy-arc cutting and Underwater welding present electrical and explosion hazards, and sometimes falling objects. [55] Rigging, lifting and placing heavy objects; Underwater search and recovery
Generalized hypoxia occurs when breathing mixtures of gases with a low oxygen content, e.g. while diving underwater especially when using closed-circuit rebreather systems that control the amount of oxygen in the supplied air, or when breathing gas mixtures blended to prevent oxygen toxicity at depths below about 60 m near or at the surface ...
Diving safety is the aspect of underwater diving operations and activities concerned with the safety of the participants. The safety of underwater diving depends on four factors: the environment, the equipment, behaviour of the individual diver and performance of the dive team.
Red flags fly on beaches due to dangerous rip currents and high surf. Here's how to stay out of harms way.
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 mechanism for this type of shallow water blackout is lack of arterial oxygen expedited by low carbon dioxide levels, as a consequence of voluntary hyperventilation before the dive. Blackouts which occur in swimming pools are probably driven only by excessive hyperventilation, with no significant influence from pressure change.
Cold water swimming still poses a significant health risk for inexperienced and untrained swimmers. It is recommended that in order to fully benefit from the metabolic and thermogenic effects of cold water swimming, a grade and progressive acclimatization program is required and preferably done under supervisor.