However, this topic has been discussed on numerous previous occasions. All deco stops are not created equal. This is a 1st clean dive on air to 60 ft. NDLs come from my Shearwater Teric running Buhlmann ZH-L16C, and my Oceanic Geo 2, running both DSAT and PZ+. The NDLs vary widely, from 32 to 57 min. If you were to dive GF 35/75, 40/85, 45/95, or PZ+ to the DSAT NDL of 57 min, you would accrue deco time, somewhere between 17 and 3 min
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So, all of these dive times on air at 60 feet are "safe". DSAT is the basis of the PADI Recreational Dive Planner, in use since the late 1980s. It is also the basis for the DSAT decompression algorithm used in Pelagic Pressure Systems computers almost as long.
It makes intuitive sense that a longer exposure should increase your risk for DCS. There is a probabilistic decompression model, SAUL, that has previously been discussed on SB. It allows one to estimate that risk
Modern Decompression These are the same exposure times for a first, clean dive to 60 feet on air shown above. The dive times are ranked by probability of DCS, % and chance. SAUL includes a 3 min safety stop.
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