I think the type of diving you’re doing tiredness is unavoidable. I’d actually avoid high O2 mixes. I started working on moorings recently at 9am low water 15 feet and finished at 3pm nearly high water 25 feet I got in and out 5 times and next day I was very tired. In and out, up and down just takes it out of you.
Nitrox for shallow water artifact diving??
- Thread starter calabash digger
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AfterDark
Contributor
We're all waiting for you to answer the rep dive question I posted earlier in this thread. Why do you keep us hanging on waiting for your professional well thought calculations of those 5 dives?
Well, to begin with, I'm busy today. Next, I am on vacation and do not have my tables with me. Finally, I am having trouble seeing why you want me to calculate those dives as if this were a beginning OW class. Anyone trained in using the tables could do it.
LOL. He's just trying to deflect from his inability to explain how nitrox works.
To ask a question in a different way...
What is it that makes one feel tired after diving? Specifically why do I feel tired if I do the last stop at 6m/20' and ascend promptly to the surface. Talking about dives with 30 to 60 mins of (accelerated) deco in the 45m/150' range (using 50:80 GFs)
I know this is empirical evidence from 'me', but I do feel better if I change the 6m/20' stop to 3m/10' BUT ascend as shallow as comfortable below 3m/10'; that may be 5m, 4.5m, 4m. AND I do a slow ascend at the end, 1m/3' per min.
Why?
What is it that makes one feel tired after diving? Specifically why do I feel tired if I do the last stop at 6m/20' and ascend promptly to the surface. Talking about dives with 30 to 60 mins of (accelerated) deco in the 45m/150' range (using 50:80 GFs)
I know this is empirical evidence from 'me', but I do feel better if I change the 6m/20' stop to 3m/10' BUT ascend as shallow as comfortable below 3m/10'; that may be 5m, 4.5m, 4m. AND I do a slow ascend at the end, 1m/3' per min.
Why?
AfterDark
Contributor
I notice that I feel better after deeper dives if I do extra time at the SS. While in NC the 1st time I spent 10-15 minutes at 10-15FSW taking pictures of the pretty fish after the second dive of the day. Later I noticed I felt different as in better than I did after the 1st dive. That became SOP for the rest of week and it seemed to work. As you posted empirical evidence, but I do it whenever I do a SS.
ginti
Contributor
I found something interesting.
Here's the link to the U.S. Navy Diving Manual; it is a revision from 2005, and I did"t find the table I posted before in the sections about oxygen toxicity (maybe you can try to look better in the text, I took only a quick look):
http://www.operationalmedicine.org/TextbookFiles/USNDiveManual/Contents.pdf
Here's another document, the DAN Nitrox Workshop, Divers Alert Network, November 2000:
DAN Nitrox Workshop Proceedings
At the end of page 88*** they start discussing the numbers 1.6/1.4 and others as well. You were right, there were no scientific studies apparently, just a work of guessing the right pressure carried out in different conditions and environment, which resulted in different agencies/groups using different values depending on their own needs.
***the pdf reader counts the first three pages, so if you want to go to the right page write 91
ginti
Contributor
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