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Technical scuba diving – an introduction [click here to return to visit the Omni Diver Homepage]

Technical dives may be defined as being either dives to depths deeper than 130 feet / 40 meters or dives in an overhead environment with no direct access to the surface or natural light. Such environments may include fresh and saltwater caves and the interior of shipwrecks. In many cases, technical dives also include planned decompression carried out over a number of stages during a controlled ascent to the surface at the end of the dive.  The depth-based definition is derived from the fact that breathing regular air while experiencing pressures greater than those at 100 feet or deeper causes a progressively increasing amount of impairment due to nitrogen narcosis. Increasing pressures at depth also increase the risk of oxygen toxicity in oxygen-rich breathing gasses. For this reason technical diving often includes the use of breathing mixtures other than air.  These factors increase the level of risk and training required for technical diving far beyond that required for recreational diving. This is a fairly conservative definition of technical diving.

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Reference material for this scuba diving related informational article: wikipedia – the free online encyclopedia, scuba diving category

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