DSAT EQUIVALENT AIR DEPTH TABLE PDF

Doc IntrepidOct 18, Figuring the MOD, ppo2 no problem but what would the SI be between multiple dives and how much residual would be left to figure in the next dive. While at 20 metres the no-stop time is 35 minutes. You set the ppo2 from 1. From Wikipedia, the free encyclopedia. Start of add to list layer. Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.

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These limits have been detailed in the US Navy dive tables and other similar references, in terms of no-decompression limits over a selected range of depths. At the same time the diver will now be exposed to an increased PO2 partial pressure of oxygen ; though oxygen exposure is not an issue with air within recreational depths, the elevated exposure levels with nitrox now become an additional concern.

It may be helpful to think of oxygen and nitrogen in terms of drugs. The effect of each drug, as experienced by the diver, will be dependent upon the dose determined by its partial pressure , combined with the duration of exposure determined by dive time.

Equivalent Air Depth When using nitrox, the diver is exposed to a reduced dose lower partial pressure of nitrogen, compared to air. In effect, when using nitrox at a specific depth over a specific period of time, it is the equivalent of this diver breathing air at a shallower depth for the same period of time. By accurately calculating this equivalent shallower depth, it is then possible to simply use this shallower depth in place of the actual depth, with any air dive tables, for all standard dive calculations.

This concept is known as equivalent air depth abbreviated as EAD. To demonstrate the concept of equivalent air depth, consider Table 7 below , which depicts the partial pressure of nitrogen in air, as well as in the mixes of EAN32 and EAN40, at various depths.

And because he is on-gassing at the rate of the shallower depth, the same no-decompression time limit from that shallower depth would also now apply to the deeper dive; effectively, the diver has significantly extended his no decompression limit at the deeper depth, simply by using EAN40 instead of air at that depth. This mathematical procedure is depicted in Metric Formula 7 and Imperial Formula 8 below.

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Equivalent air depth

So at 90 feet on this mix, the diver would calculate their decompression requirements as if on air at 67 feet. Share This Page Tweet. US Navy tables have also been used with equivalent air depth, with similar effect. Depth recording formats and data storage capabilities of 47 models of downloadable diving Start of add tahle list layer. Yes, my password is: You must log in or sign up to reply here. Identified recreational diving fatality reviews. Nitrox Dive Tables So at 27 metres on this mix, the diver would calculate their decompression requirements as if on air at 20 metres.

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These limits have been detailed in the US Navy dive tables and other similar references, in terms of no-decompression limits over a selected range of depths. At the same time the diver will now be exposed to an increased PO2 partial pressure of oxygen ; though oxygen exposure is not an issue with air within recreational depths, the elevated exposure levels with nitrox now become an additional concern. It may be helpful to think of oxygen and nitrogen in terms of drugs. The effect of each drug, as experienced by the diver, will be dependent upon the dose determined by its partial pressure , combined with the duration of exposure determined by dive time. Equivalent Air Depth When using nitrox, the diver is exposed to a reduced dose lower partial pressure of nitrogen, compared to air. In effect, when using nitrox at a specific depth over a specific period of time, it is the equivalent of this diver breathing air at a shallower depth for the same period of time.

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