Dr Deco
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Hello Noangle72:
Short Answer
I would recommend a wait of at least 12 hours before climbing.
Real Answer
= Assuming that you are not immediately ascending post dive on a cog railway, there will definitely be an interval between the dive and and climb. This interval is not given in your initial posting - but a later one states 24 hours.
= Little is said in the posting about the depths and dive durations and, thus gas load calculations are not possible.
Altitude Tables do not go to that altitude anyway (NOAA stops at 9,000 feet).
= No dive/fly table describes the conditions under which the table should be used. The “palace secret” is that all of these NOAA [and US Navy] calculations use the Haldane [critical supersaturation] method. This means that tissue micronuclei are not accounted for [or even considered] in the algorithm. Post dive activity is important [see later below].
= Tissue micronuclei are virtually unconsidered in current diving information; DAN virtually never mentions them. [It does not consider them in dive/fly studies. Richard Vann PHD at Duke University [where DAN is located] does consider them when performing decompression work for NASA. He and I developed the test protocols a decade ago.] Skin Diver magazine never posits nuclei generation as a cause for DCS problems – with the exception of some articles by John Francis.] They are mentioned all of the time by me on this FORUM.
= Tissue nuclei play some role in all post dive scenarios. Dissolved nitrogen will be eliminated in a fashion that can be calculated [not really, but it works more or less]. When the nitrogen enters into microbubbles [generated by musculoskeletal active – exercise], then the partial pressure fall to the ambient [surrounding] pressure and the gradient for elimination is virtually gone. Thus, not expending energy lugging gear will reduce the propensity to nuclei formation/growth. Slow down and let time pass- as you appear to be doing.
[This is all cover in my Decompression Physiology class, but that will not help you today.]
= If you generate these tissue nuclei and then begin an ascent within a few hours, you could be very disappointed in the final result.
A very slow ascent would be more prudent – and with a surface interval of 12 hours.
This answer is the best I can provide without more time - and a big chalk board! Altitude Sickness is another story [but not SCUBA related].
Dr Deco :doctor:
Short Answer
I would recommend a wait of at least 12 hours before climbing.
Real Answer
= Assuming that you are not immediately ascending post dive on a cog railway, there will definitely be an interval between the dive and and climb. This interval is not given in your initial posting - but a later one states 24 hours.
= Little is said in the posting about the depths and dive durations and, thus gas load calculations are not possible.
Altitude Tables do not go to that altitude anyway (NOAA stops at 9,000 feet).= No dive/fly table describes the conditions under which the table should be used. The “palace secret” is that all of these NOAA [and US Navy] calculations use the Haldane [critical supersaturation] method. This means that tissue micronuclei are not accounted for [or even considered] in the algorithm. Post dive activity is important [see later below].
= Tissue micronuclei are virtually unconsidered in current diving information; DAN virtually never mentions them. [It does not consider them in dive/fly studies. Richard Vann PHD at Duke University [where DAN is located] does consider them when performing decompression work for NASA. He and I developed the test protocols a decade ago.] Skin Diver magazine never posits nuclei generation as a cause for DCS problems – with the exception of some articles by John Francis.] They are mentioned all of the time by me on this FORUM.
= Tissue nuclei play some role in all post dive scenarios. Dissolved nitrogen will be eliminated in a fashion that can be calculated [not really, but it works more or less]. When the nitrogen enters into microbubbles [generated by musculoskeletal active – exercise], then the partial pressure fall to the ambient [surrounding] pressure and the gradient for elimination is virtually gone. Thus, not expending energy lugging gear will reduce the propensity to nuclei formation/growth. Slow down and let time pass- as you appear to be doing.
[This is all cover in my Decompression Physiology class, but that will not help you today.]= If you generate these tissue nuclei and then begin an ascent within a few hours, you could be very disappointed in the final result.
A very slow ascent would be more prudent – and with a surface interval of 12 hours.This answer is the best I can provide without more time - and a big chalk board! Altitude Sickness is another story [but not SCUBA related].
Dr Deco :doctor:
