It sounds like the "custom tables" that Dan is talking about are individually customized to the physiology of a specific individual. If so, than publishing them here would not be a good thing, for the reasons Dan mentioned above.
But something like this would, it seems to me, need to be validated, not by diving these tables, but by making specific dives and using doppler technology to ensure that microbubbles are not formed using these tables. Without some method of varifying these custom tables, the fact that the person is asymtomatic is not enough to validate these tables. Boulder John's comments should be taken to heart here, as being asymptomatic is not enough. Recent studies of even breath-hold divers (Ama) show that there are long-term effects of decompression sickness that may be asymptomatic.
Doppler detection in Ama divers of Japan. - PubMed - NCBI
Association of microparticles and neutrophil activation with decompression sickness. - PubMed - NCBI
Field validation of Tasmania's aquaculture industry bounce-diving schedules using Doppler analysis of decompression stress. - PubMed - NCBI
SeaRat
PS--I agree with Dan about using real names for these posts, and have done so from day one on ScubaBoard.
Thanks John,
And George, Bill and Dr Bill did a great deal of Doppler while they were developing the tables.
I even got into a couple of those doppler studies
---------- Post added November 3rd, 2015 at 03:30 PM ----------
Your dry suit comparison is very much a false analogy.
A custom dry suit uses very simple measurements of the human body to make a garment of the appropriate size. That process has not changed in however many hundreds and probably thousands of years people have been custom tailoring suits. It will not change much in the future. Once it is made, you can see and feel immediately the degree to which it fits. In contrast, you have no idea how well your custom tables fit you. All you know is that you didn't get bent. It is possible that you were very close on quite a few occasions, and it is possible that on those occasions an "off-the-rack" table would have done a far superior job. In fact, it is possible that the "off-the-rack" tables would have done a better job every single time. How would you know otherwise?
Thanks for being obnoxious beyond belief BoulderJohn.
And you don't know, what you don't know about how they made these tables. You don't have a clue. I would have thought your being aware Dr Bill Hamilton was a major part of making these tables, would have led you to believe great care was taken...but...eh...
Doppler studies were constantly done on George and several others on the team. George tested many variations of the deco curves, and this optimization led to world record deep cave records. When he did 280 feet for 6 hour duration ( for the 1st 3 mile world record dive he and JJ did... and then was able to do a 12 hour deco, and be without DCS, Navy Spec Warfare took this very seriously from then on.
The science was good, but it was also a "custom suit" concept, as it tested George and a small number of other divers with similarly high VO2 max scores, for bubbling after many types of profiles. Divers with normal VO2 max scores, would have been expected to have been seriously bent. It was believed then, and still by us now, that divers with the right physiology for these tables, would be SAFER doing the more rapid deco schedule in these tables.
It was also George's considered opinion, that on a short tech dives like the 280 foot Palm Beach tech dives--for 25 minute bottom time, that the smarter way to dive them was with just double 80's and a 30 foot O2 bottle....so currents and drag would be less of an issue...Carrying stage bottles meant moving slowly, and being unable to cover much ground on a great dive site. Your dive team ( 2 to 3 ) carried sufficient gas for one buddy to have a catastrophic gas loss and for all to make a safe deco ascent. Carrying MORE gas created larger dangers than it solved in the high current and high adventure sites we enjoyed covering lots of ground on.
Again...you are making me defend a position that has nothing to do with what the OP asked, and when you make pronouncements about HOW George and Bill and Bill made their tables, you are doing so with extreme ignorance.
Talk to someone else that enjoys your style of personality. I don't.