Nitrox
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Nitrox refers to any gas mixture composed of nitrogen and oxygen. It is usually used for mixtures that contain less than 78% nitrogen by volume. In the usual application, underwater diving, nitrox is
Enriched Air Nitrox diving tables, showing adjusted no-decompression times.
Technical divers preparing for a mixed-gas decompression dive in Bohol, Philippines. Note the backplate and wing setup with side mounted stage tanks containing EAN50 (left side) and pure oxygen (right side).
Cylinder showing Nitrox band and sticker marked with maximum operating depth (MOD) and oxygen fraction (%O2)
Technical diving
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Technical diving is scuba diving that exceeds the agency-specified limits of recreational diving for non-professional purposes. Technical diving may expose the diver to hazards beyond those normally a
Nitrox
…would have completely emptied the cylinders after 1 hour 14 minutes at this depth. Use of nitrox mixtures containing 50% to 80% oxygen is common in technical diving as decompression gas, which by virtue of its lower partial pressure of inert gases such as nitrogen and helium, allows for more efficient (faster…
Diver Trevor Jackson returning from a 178 m (584 ft) wreck dive
Diver equipped for decompression dive
Technical diver during a decompression stop
An example of wreck diving; A technical diver diving the Nasello wreck in Sardinia at 34m depth.