Deep diving
Videos
Deep diving is underwater diving to a depth beyond the normal range accepted by the associated community. In some cases this is a prescribed limit established by an authority, while in others it is as
Wreck diver Trevor Jackson using a rebreather with open circuit bailout cylinders returning from a 180-metre (590 ft) dive.
Technical divers preparing for a mixed-gas decompression dive. Note the backplate and wing setup with side mounted stage tanks containing EAN50 (left side) and pure oxygen (right side).
Closed circuit rebreather (AP Diving "Inspiration").
Breathing gas
Videos
A breathing gas is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathing gas, but other mixtures of gases, or pure oxygen, are al
Deep diving
…it may vary depending on whether the diving is recreational, technical or commercial. Nitrogen narcosis becomes a hazard below 30 metres (98 ft) and hypoxic breathing gas is required below 60 metres (200 ft) to lessen the risk of oxygen toxicity. For some recreational diving agencies, "Deep diving", or "Deep diver" may…
Sailors check breathing devices at sea.
A closed bell used for saturation diving showing emergency gas supply cylinders
2% Heliox storage quad. 2% oxygen by volume is sufficient at pressures exceeding 90 msw.
Electro-galvanic fuel cell as used in a diving rebreather