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California Spearfishing Talk here about spearfishing on California's Pacific Coast, and post those reports and photos! |
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10-15-2010, 03:15 PM | #16 |
Saltybones1
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Re: a question about swb
The last time I was in freediving in California, I shot a SWB, but got WSB on the way up. . .glad I had a diving buddy. He brought me to the surface, safe and sound and the first thing he said was. . ."Man. . .that's got to be the BIGGEST SWB I've ever seen shot from these waters". LOL!!!!!! This thread is funny as CRAP!!!!
Rick |
10-15-2010, 03:39 PM | #17 |
Brian
Join Date: Oct 2008
Location: Napa CA
Posts: 612
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Re: a question about swb
Well I am glad this is all I have messed up today, but the day is not over yet.
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10-15-2010, 03:42 PM | #18 |
Penguin
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Re: a question about swb
On a more serious note with the thread, depth has little to do with it. The biggest pressure change happens within the first 5 feet underwater. For this reason most blackouts occur within 10 ft of surfacing or 30 SEC AFTER THE DIVER HAS ALREADY SURFACED.
There are some great videos out there of blackouts where people have already surfaced and slip back under. |
10-15-2010, 03:53 PM | #19 | |
Saltybones1
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Re: a question about swb
Quote:
BTW, does anyone know if there is a size limit on SWB's??? OK. . .I'm done (for now). Thanks for being a good sport. Rick |
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10-15-2010, 03:57 PM | #20 | |
Registered User
Join Date: Oct 2006
Posts: 4,647
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Re: a question about swb
Quote:
http://spearboard.com/showthread.php...hlight=uku+swb |
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10-15-2010, 04:02 PM | #21 |
Registered User
Join Date: Aug 2009
Location: Leucadia
Posts: 1,268
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Re: a question about swb
Thanks for the feedback. I think the takehome is to never dive for WSB without a buddy.
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10-15-2010, 04:12 PM | #22 | |
Saltybones1
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Re: a question about swb
Quote:
90% of blackouts occur AT THE SURFACE, within the first 30 seconds after surfacing. (And some of these occur AS THE DIVER IS GIVING THE OK SIGNAL!!!!) As you say, many slip back below the surface, after their dive buddy thinks they are fine!!!! My personal thought is that even when diving with a buddy, when the "safety" buddy sees they are going to make it to the surface. . .down they go, to spear some fish, at the most CRITICAL time in their surfacing buddy's recovery! 9% occur, upon ascent, from 15 feet to the surface. Only .9 % occur below 15 feet. Please take a freediving course, if you freedive. There are WAY, WAY too many people dying from blackouts. . .it need not be this way! Dive safe! Rick |
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10-15-2010, 04:20 PM | #23 |
Saltybones1
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Re: a question about swb
As a followup. . .being in the same ocean on the same day with a buddy, is not the same as diving with a safety-trained rescue buddy, who knows exactly what to look for and how to rescue you, if you do have a LMC or blackout. . . and vice versa. Very important.
Rick |
10-15-2010, 04:21 PM | #24 | ||
discord and rhyme
Join Date: May 2007
Location: San Mateo
Posts: 2,879
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Re: a question about swb
Quote:
Quote:
surface=1ATM 33ft=2ATM 66ft=3ATM 99ft=4ATM If you are refering to the compression of gasses, then yes compression is greatest closer to the surface. 0ft=100% lung volume 33 ft=50% 66ft=33% 99ft=25% For this reason, most swb occurs between during the last ATM of ascension or at the surface
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Timid men prefer the calm of despotism to the tempestuous sea of liberty. |
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10-15-2010, 04:34 PM | #25 |
Saltybones1
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Re: a question about swb
As you descend, the Partial Pressure of your O2 is relatively higher at depth, because of your lung compression, (though it is actually constantly decreasing with time). When you ascend, your lungs expand but your % of O2 is decreasing, proportionally (PPO). When you get to the surface, your lungs are at full expansion, but your relative % of O2 is extremely low. When it hits around 10%, the LIGHTS GO OUT!!! Doesn't matter too much about how you feel, contractions, etc. etc. This is why diving with a trained buddy is important. It's YOUR life. . .think about it.
Rick |
10-15-2010, 04:41 PM | #26 |
Registered User
Join Date: Aug 2009
Location: Leucadia
Posts: 1,268
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Re: a question about swb
Lmc?
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10-15-2010, 04:43 PM | #27 |
Saltybones1
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Re: a question about swb
How you breathe, upon surfacing is also very important to avoid "pulmonary dump", which can be another cause of blackout. Actually, if my memory serves me correctly, there are about 6 kinds of blackout. . . maybe more. . "White out" would be overbreathing before the dive, resulting in blackout. There are blackouts which would come from, say, swimming distances in a shallow pool, etc. These are not really SWB (or WSB) because they did not result from ascending from depth. Lots to learn. . .take a course!
Rick |
10-15-2010, 04:47 PM | #28 |
Saltybones1
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Re: a question about swb
LMC is a "Loss of Motor Control", probably a better term than "Samba". You are not completely blacked out, but lose control of your motor skills. Usually temporary, and it's most important to guard the person's airway (get their mouth and nose out of the water) and they will recover on their own after a few seconds, usually.
Rick |
10-15-2010, 04:56 PM | #29 |
Saltybones1
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Re: a question about swb
I think this is a really good thread! If it can save ONE person's life, it was worth it.
BTW, if you would like to take an excellent course, Performance Freediving Int'l (Kirk Krack and team-my instructors) or FII Freediving Instructors Int'l (Martin Stepanek) are both tremendous, from what I hear. Just Google them for contact info. Rick |
10-15-2010, 05:13 PM | #30 |
discord and rhyme
Join Date: May 2007
Location: San Mateo
Posts: 2,879
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Re: a question about swb
__________________
Timid men prefer the calm of despotism to the tempestuous sea of liberty. |
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