cns clock

[RichLockyer]

Charlie99 once bubbled...
What did the book say, and why didn't you question the instructor?

I didn't question because I didn't know better until after the class. As far as the book, it gave the basic single exposure/24 hour NOAA limits.

 

[blacknet]

Hello,

You forgot one key source that's perhaps less famous and more important, the U.S. NEDU. They do all the testing and help with design for gear we will not see for a good 5 years to come. They also developed procedures, tables and the like.

Ed

 

[BigJetDriver]

blacknet once bubbled...
Hello,

You forgot one key source that's perhaps less famous and more important, the U.S. NEDU. They do all the testing and help with design for gear we will not see for a good 5 years to come. They also developed procedures, tables and the like.

Ed

You are absolutely right! I did not mean to leave out the boys from Panama City Beach. They do excellent work, sometimes at the expense of their own bodies!!! BUT THANK GOD FOR THEM!

 

[fins wake]

you must also question the existance of tissue compartments and inert gas loading with in those tissues/compartments.

Well, 'tissues/compartments' is a theoretical concept as you probably know (based on among other things presumed similar half-times within various 'real' tissues and dependant on a lot of factors. As for inert gas loading therein, that's also open to some interpretation, as again, you probably will know. However, most hyperbaric researchers and medics are agreed on most fundamental issues.

This has lead to a deeper and better understanding and more refined formulas today.

Yes, precisely. This is the fundamental reasoning behind models. As in, einsteinian physics hasn't 'proved Newton wrong', nor has it (entirely) 'superceded Newton'. Newtonian physics are still valid, but there are newer models which explain previously not (or badly) understood phenomena better.

(EDIT Case in point. I personally believe Haldane did ground-breaking work back in 1907 and find the Internet armchair theorists who dismiss him so cavalierly today rather lacking in both historical and scientific model theory acumen. Haldane set the groundwork. Others, such as Workman and Bühlmann have moved the frontiers greatly forward. Again, a lot of people actually trust their dive safety to these pioneers' work and it would appear with all reason. Then, personally, I do believe that the bubble models propagated by University of Hawaii people, Yount, Baker, Hoffman and latterly by Dr Wienke of RGBM fame are fundamentally even better explanations for what is happening and to most of us in practice, they don't clash fundamentally with the broad strokes of neohaldanean theory as we dive it. Finally, I find Dr Powell's stress on the effects of physiological stress on nuclei-formation extremely fascinating (and convincing). Yet another layer to the onion ... (EDIT OVER)

Unlike most Internet 'armchair decompression philosophers' out there, proper decompression researchers and hyperbaric specialists usually understand this concept fully (Dr Powell is an excellent case in point as BigJetDriver has already hinted), qualify their advice and stay within their areas of competence and therefore give very sensible, well-explained and valuable advice.