By Cynde Loo Hoo on Thursday, December 26, 2002 - 4:47 pm: |
i got into a discussion with a friend about deep diving, holding breath, all that. we started talking about how narcosis screws your judgement up, like hitting the inflate button on the bc rather than the deflate button and then jetisoning to the surface and the sad outcome that would inccur...so...here is my question...purely hypothetical of course, as neither of us would even think of doing this...just a question of diving physics...
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By Ida Christie on Thursday, December 26, 2002 - 4:58 pm: |
Your body would still react like a soda pop.
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By Ida Christie on Thursday, December 26, 2002 - 5:01 pm: |
Oh, I just read your heading. Not an expert. LOL.
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By Cynde Loo Hoo on Thursday, December 26, 2002 - 6:09 pm: |
ida, that is what i think would happen. it would still be holding your breath at depth, and even if you came back up to 100 feet, your lungs would feel the pressure and explode...however, my friend thinks that nothing would happen because you heald your breath at a starting point, went down, then came back up to your starting point....
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By JIM KENNEDY on Thursday, December 26, 2002 - 6:18 pm: |
Good Question!
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By Cynde Loo Hoo on Thursday, December 26, 2002 - 6:58 pm: |
jim, ok, you have described what my friend thinks...hmmm...i'm hoping that walt III will have some info on this hypothetical question...oh walt...
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By Glen Reem on Thursday, December 26, 2002 - 9:50 pm: |
Not a registered 'expert' but...
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By JIM KENNEDY on Thursday, December 26, 2002 - 10:49 pm: |
I didn't say anything about DCS, I stated that it takes longer to rid of N than it takes to make it.
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By Cynde Loo Hoo on Thursday, December 26, 2002 - 11:46 pm: |
ok glen, i will play the devil's advocate...if you go down to 100 feet...you are at 3 atm (god i whish i would have kept my scuba 101 book...wait, was this senario covered in scuba 101?)...anyway, you take a breath, go down 100 feet, and come back up...you would not have lung "expansion" as you didn't breathe down and back up...but what are the effects of breathing air down to 100 feet, and doing this exercise? nitrogen saturation, effect of atm pressure...i.e...could a free diver go to a certain depth on air, take the reg out of the mouth...ride the sled down and back up to that depth and survive without any consequences...narcosis, dcs, etc....
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By Glen Reem on Friday, December 27, 2002 - 9:47 am: |
Cynde,
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By Cynde Loo Hoo on Friday, December 27, 2002 - 2:31 pm: |
glen, I KNOW THAT YOU ARE NEVER SUPPOSED TO HOLD YOUR BREATH WHILE ON SCUBA...DUH...my question was a very hypothetical question, as it was a discussion i had with someone, and i was curious to find out if anyone had thought of this, HYPOTHETICALLY of course. i don't need you to tell me to refer to my book. again, i know that you aren't supposed to hold your breath while on SCUBA. duh! my question was, i say that holidng your breath at 100 ft (yes, i know that you are at increased atm at that point, duh again), but i say that it is holding your breath regardless of what depth you are at, however, my "friend" believes that it would not have any adverse effects as you started at a particular depth, and returned to that particular depth....but i say it would....so, just forget about the whole thing...i think you missed my whole HYPOTHETICAL WOULD NEVER TRY IT dang point!
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By John P. Wahlig on Friday, December 27, 2002 - 2:41 pm: |
My useless opinion:
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By Cynde Loo Hoo on Friday, December 27, 2002 - 2:50 pm: |
thank you john.
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By JIM KENNEDY on Friday, December 27, 2002 - 6:11 pm: |
With an interview with Skin-Diver Magazine two or three years back; Pepin (maybe mispelled) stated that he has suffered from three hits of DCS while breath holding...
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By Glen Reem on Friday, December 27, 2002 - 6:58 pm: |
Jim,
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By Walt III on Friday, December 27, 2002 - 7:08 pm: |
While Pipin was down here free diving the Windjammer he took several breaths off a regulator at about 180 ft after free diving down. It could have been hits on dives like this where he is down deep for 5 to 10 minutes then makes a rocket ascent. I vote for no problem 100 to 200 and back to 100, as long as you can hold your breath that long.
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By Glen Reem on Friday, December 27, 2002 - 7:12 pm: |
Cynde,
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By Glen Reem on Friday, December 27, 2002 - 8:14 pm: |
Walt,
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By Cynde Lee on Friday, December 27, 2002 - 9:44 pm: |
jimmi and walt, thank you, this was the type of response i was looking for.
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By Walt III on Saturday, December 28, 2002 - 7:21 am: |
Glen No it only does scuba Dives.
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By JIM KENNEDY on Saturday, December 28, 2002 - 12:19 pm: |
Cynde Lee~
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By Cynde Lee on Saturday, December 28, 2002 - 5:35 pm: |
jim, walt has posted some great pics (taken by bob killorin) of some of the anchors and chains he has found in his deep explorations. It all made sense to me when he said it was "kind of like mountain climing." again, i thank you for your feedback to the question posed in this thread.
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By JIM KENNEDY on Saturday, December 28, 2002 - 10:53 pm: |
Cyndee Lee~
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By Cynde Lee on Sunday, December 29, 2002 - 2:11 pm: |
hi jimmi, i'm sorry if you thought i was referring to you, i was referring to the posts that were in reference to my last statement in the comment above;-).
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By Bill Sweeney on Saturday, January 4, 2003 - 12:43 am: |
This is very interesting to me. We've got overtime at the Fiesta Bowl. I'm hoping for the OSU Buckeyes.
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By Jake Richter - NetTech on Saturday, January 4, 2003 - 12:37 pm: |
Bill,
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By Daniel Senie on Saturday, January 4, 2003 - 8:59 pm: |
Adding to what Jake said, I had occasion a few weeks back on a dive off Grand Cayman to hold my breath for about 30 seconds to get my bubbles out of a very wide angle shot (see if you can tell which one... images at our scuba pages).
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By Bill Sweeney on Saturday, January 4, 2003 - 11:09 pm: |
Yeah, that's right. The most important rule is to never hold your breath. As experience is gained, however, you can give yourself some leeway and revise that rule on occasion.
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By Wally and Eva on Sunday, January 5, 2003 - 9:17 am: |
Other then when that pesky first stage decides to take a crapper
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By Glen Reem on Sunday, January 5, 2003 - 8:28 pm: |
i believe one of the secrets here is that most of these learned skills are 'conditioned reflexes'. Like knowing that your snorkel has filled with water because you heard the gurgles as it filled. Or, here, being conscious of depth change vs breathing (hard to do, in my experience). Always best to have air flowing-- or, better stated, to have the airway open! Even if you are not breathing, i.e., inhaling or exhaling, if your airway is open, no harm (which comes from overpressure in the lungs) will happen.
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