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  2. Rebreather diving - Wikipedia

    en.wikipedia.org/wiki/Rebreather_diving

    In rebreather diving, ... Fleuss tested his device in 1879 by spending an hour submerged in a water tank, then one week later by diving to a depth of 5.5 metres (18 ...

  3. Diving rebreather - Wikipedia

    en.wikipedia.org/wiki/Diving_rebreather

    A Diving rebreather is an underwater breathing apparatus that absorbs the carbon dioxide of a ... It had a duration of 6 hours and a maximum dive depth of 200 metres ...

  4. Maximum operating depth - Wikipedia

    en.wikipedia.org/wiki/Maximum_operating_depth

    In underwater diving activities such as saturation diving, technical diving and nitrox diving, the maximum operating depth (MOD) of a breathing gas is the depth below which the partial pressure of oxygen (pO 2) of the gas mix exceeds an acceptable limit.

  5. Deep diving - Wikipedia

    en.wikipedia.org/wiki/Deep_diving

    Deep diving is underwater diving to a depth beyond the norm accepted by the associated community. In some cases this is a prescribed limit established by an authority, while in others it is associated with a level of certification or training, and it may vary depending on whether the diving is recreational , technical or commercial .

  6. Equivalent narcotic depth - Wikipedia

    en.wikipedia.org/wiki/Equivalent_narcotic_depth

    Equivalent narcotic depth (END) (historically also equivalent nitrogen depth) is used in technical diving as a way of estimating the narcotic effect of a breathing gas mixture, such as nitrox, heliox or trimix. The method is used, for a given breathing gas mix and dive depth, to calculate the equivalent depth which would produce about the same ...

  7. Halcyon PVR-BASC - Wikipedia

    en.wikipedia.org/wiki/Halcyon_PVR-BASC

    Passive addition implies that in steady state operation (at a constant depth) addition of fresh feed gas is a response to low volume of gas in the loop - the gas is injected when the top of the counterlung activates a demand type addition valve, which provides feed gas as long as the diver continues to inhale. The mechanism discharges gas to ...

  8. Rebreather - Wikipedia

    en.wikipedia.org/wiki/Rebreather

    Surface-supplied diving equipment may incorporate rebreather technology either as a gas reclaim system, where the surface-supplied breathing gas is returned and scrubbed at the surface, or as a gas extender carried by the diver. [18] [19] Rebreathers may also be used as self-contained diver bailout systems for either scuba or surface-supplied ...

  9. Equivalent air depth - Wikipedia

    en.wikipedia.org/wiki/Equivalent_air_depth

    The equivalent air depth, for a given nitrox mix and depth, is the depth of a dive when breathing air that would have the same partial pressure of nitrogen. So, for example, a gas mix containing 36% oxygen (EAN36) being used at 27 metres (89 ft) has an EAD of 20 metres (66 ft).

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