$13 a cubic ft? Ouch, even I might be looking for a CCR.......
Here is some interesting information from a friend of mine who is a diving doctor for our military as well as flight surgeon, as well as someone who has a fellowship at Duke University. I asked him about the possibility of a chamber ride to 165' on air to do some "experiments" similar to what we did in the chamber when I was learning to fly in high altitude aircraft, here are his words:
"There's a reasonable (though still inadequate) body of research on narcosis available in the literature. Interestingly, there appears to be a subjective tolerance that develops amongst divers exposed to narcotic depths that does not correlate to their objective testing results. IOW, divers don't feel drunk, but still perform as if they are (study conducted at 45 - 50 metres). Also, divers who consume alcohol regularly, are more likely to report less subjective narcosis than lesser drinkers. Again, their objective test results showed greater decrement than they thought present. There was a study published in the UHMS journal about this in the last issue or two."
Pretty much sums up what I have been saying in this thread.
The example of the 170' dive that became 190' could have easily become a 150' dive also. The depth range of 18/45 (and corresponding deco calculations) could have easily accomodated that depth. However, we couldn't even see the wreck from that depth. Of course we re-calculated our bottom gas available for the changed profile and adjusted our rock bottom while we were in the process of enjoying the dive. That is the very cool thing about some of the "battlefield calculations" that you can use with standardized gases. For me personally, I try not to lose sight of the fact that gases, equipment, etc are all just tools in my toolbox that let me enjoy the primary purpose of the exercise: exploring some place I have never been before. I learn to use the tools but don't let them overshadow the primary reason I am diving.
While I prefer not to dive air, I have no "compulsion" to not diving air if nitrox or mix is not available, within limits. I simply limit my depths and times. I find personally that I get more sub clinical DCS symptoms when I approach NDL limits on air than I do even after pushing the corresponding nitrox NDL's. I find this particularly after a series of dives over a series of days. Guess it must be my age. I still play competitive rugby so my cardio is pretty good but I definitely feel better if I can dive higher % of 02. Just my experience here and no hard science to back it up other than my own feedback from my body.
Here is some interesting information from a friend of mine who is a diving doctor for our military as well as flight surgeon, as well as someone who has a fellowship at Duke University. I asked him about the possibility of a chamber ride to 165' on air to do some "experiments" similar to what we did in the chamber when I was learning to fly in high altitude aircraft, here are his words:
"There's a reasonable (though still inadequate) body of research on narcosis available in the literature. Interestingly, there appears to be a subjective tolerance that develops amongst divers exposed to narcotic depths that does not correlate to their objective testing results. IOW, divers don't feel drunk, but still perform as if they are (study conducted at 45 - 50 metres). Also, divers who consume alcohol regularly, are more likely to report less subjective narcosis than lesser drinkers. Again, their objective test results showed greater decrement than they thought present. There was a study published in the UHMS journal about this in the last issue or two."
Pretty much sums up what I have been saying in this thread.
The example of the 170' dive that became 190' could have easily become a 150' dive also. The depth range of 18/45 (and corresponding deco calculations) could have easily accomodated that depth. However, we couldn't even see the wreck from that depth. Of course we re-calculated our bottom gas available for the changed profile and adjusted our rock bottom while we were in the process of enjoying the dive. That is the very cool thing about some of the "battlefield calculations" that you can use with standardized gases. For me personally, I try not to lose sight of the fact that gases, equipment, etc are all just tools in my toolbox that let me enjoy the primary purpose of the exercise: exploring some place I have never been before. I learn to use the tools but don't let them overshadow the primary reason I am diving.
While I prefer not to dive air, I have no "compulsion" to not diving air if nitrox or mix is not available, within limits. I simply limit my depths and times. I find personally that I get more sub clinical DCS symptoms when I approach NDL limits on air than I do even after pushing the corresponding nitrox NDL's. I find this particularly after a series of dives over a series of days. Guess it must be my age. I still play competitive rugby so my cardio is pretty good but I definitely feel better if I can dive higher % of 02. Just my experience here and no hard science to back it up other than my own feedback from my body.
