Posted on 04/03/2009 5:31:22 PM PDT by driftdiver
My husband and son freedive (spearfish), but only to depths of about 40 feet. They have a friend who dives with them, and he's a serious freediver, 120 foot depths and he holds his breath for 4 plus minutes. But he's very aware of shallow water blackout and has taken classes (under controlled conditions) where they have you hold your breath underwater till you pass out, so you can know how it feels when it's about to happen.
Wasn’t there a woman who died doing this a few months ago?
Probably, people die from this fairly regularly.
Wow, that is impressive. It’s amazing that they don’t take a small emergency tank of O2. I can’t sit here in my house and hold my breath that long.
“It’s amazing that they don’t take a small emergency tank of O2. “
I think they have safety divers but still drown. They have small tanks but they wouldn’t provide much air at 300 feet. Maybe one breath.
There have been a number of extreme free divers who have died doing this. One of the more famous was a French free diver by the name of Loic Leferme. At one time he held the world record at over 560 feet. IIRC, the world record is now over 600 feet with an ascent bag. In a pure freedive, I believe it’s in the vicinity of 400 feet. The physiological changes that the body undergoes at that depth are, to say the least, amazing...think pulse of 15-20 bpm, for starters, along with vascoconstriction pulling blood away from the arms, legs, and brain.
I read that one of the training techniques they do on land is to breathe in, then hold for a minute, and then start walking until they have to breathe again. Some divers can walk nearly 1/4 of a mile before having to take another breath.
“Depends on the persons body, but yeah pretty much. I think fat people tend to float better.”
We are also prone to being hit with harpoons and tagged by overzealous liberal oceanographeres.
Can you document this, please?
Not calling BS, just surprised. What is the pressure differential over 1 atmosphere at a mere 1 meter's depth?
Cheers!
Me too, besides thats where the pretty fishes and girls in bikinis are.
If you want tanked, shallow, and in bikinis, you don't even have to go in the water. Just go to the bars on the beach :-P
Cheers!
“Not calling BS, just surprised. What is the pressure differential over 1 atmosphere at a mere 1 meter’s depth?”
The circumstances are you take a full breath to the limit of your lungs and then surface quickly. PADI teaches this as part of their training. not sure of the source.
“Just go to the bars on the beach “
Thats after the diving. Besides you gotta prove your diving prowess before arriving at the bar.
“remember the guy in my class barfing underwater while we did our first “
I’ve done that, at about 102 feet.
Yeah, well this idiot took the regulator COMPLETELY OUT OF HIS MOUTH FIRST. Narrowly avoided disaster. I was asked a couple of years after I got certified if I’d be interested in taking the PADI IDC and becoming a Dive Master. I took one look at the insurance requirements and cost and decided it just wasn’t worth it. Better to do it on my terms.
Vomit goes thru regulators pretty darn well. Although I did take it out after to wash my mouth and it out.
Still not sure why, was on 36% at about 102feet which is close to the limit for oxygen toxicity. Might also have been the 8 foot swells on the ride out.
Nice lungs.
Got to take a long ride out of Islamarada with a Dad and Lad who had a bag of Burger King they plowed through as we shoved off. Made out into rough seas to reach our spot. Every one was green by the time we got there. I geared up and hopped in to settle my stomach, and after quick check rose to surface and saw all hands looking aghast at me while Dad and Lad were hanging over the side. I came up in the chum slick dead center. Cleared my reg and dropped. No worries. Was a tad tart tasting...
Deepest I ever swam was about 40 feet deep. Did it off the coast of Florida. I was 15 and not smart enough to know better. I did note, however, as I got deeper I certainly seemed less buoyant. I don’t know if it was real, or it was just a perception of the water pressure at that depth.
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