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I was reading a story about a guy names Michale Proudfoot. He was wreck diving, and his regulator broke, so he lost all of his air. Luckily he found a pocket of air in the wreck. So the story goes, he survived off of that pocket of air for two days until someone found him. He also ate sea urchins for food.
So the question that I have is this: Could he have gotten the bends if he tried to swim to the surface? He was breathing "uncompressed" air...I think. Or would it be considered compressed because it was underwater? The articles that I have read do not say the depth.
I was reading a story about a guy names Michale Proudfoot. He was wreck diving, and his regulator broke, so he lost all of his air. Luckily he found a pocket of air in the wreck. So the story goes, he survived off of that pocket of air for two days until someone found him. He also ate sea urchins for food.
So the question that I have is this: Could he have gotten the bends if he tried to swim to the surface? He was breathing "uncompressed" air...I think. Or would it be considered compressed because it was underwater? The articles that I have read do not say the depth.
Nice story....if it is true.....2 days of air in a pocket on a wreck.
Bottom line though is the air would be compressed, just as it you breathed it of a scuba regulator. So same issues.
I was reading a story about a guy names Michale Proudfoot. He was wreck diving, and his regulator broke, so he lost all of his air. Luckily he found a pocket of air in the wreck. So the story goes, he survived off of that pocket of air for two days until someone found him. He also ate sea urchins for food.
So the question that I have is this: Could he have gotten the bends if he tried to swim to the surface? He was breathing "uncompressed" air...I think. Or would it be considered compressed because it was underwater? The articles that I have read do not say the depth.
A pocket of air at depth is certainly compressed to the surrounding ambient pressure.
Especially when the air (assumed exhausted from divers) has a lower Oxygen content (15% maybe) to start with.
That would be a long 2 days.......
not true, air exhaled at 100ft for example would contain about 20% oxygen and more importantly have an oxygen partial pressure of .8 or the equivalent of breathing 80% at the surface
the co2 would reach toxic level long before the oxygen levels became too low to support life
not true, air exhaled at 100ft for example would contain about 20% oxygen and more importantly have an oxygen partial pressure of .8 or the equivalent of breathing 80% at the surface
Silly me, I was worried more about the buildup of C02
Made up assumptions:
Sac = .5
Breath from air pocket and exhale to open water to avoid CO2 problems.
To have 2,880 min (48 hours * 60 Min) of air with the assumed sac, there would have had to be 1,440 cu. ft of air in there. (volume assumed compressed to whatever depth it is at)
Being seawater (64.2 lbs/cu.ft) the wreck would have to weigh more than 92,448 lbs to stay down with that pocket in it. Of course if it ever started to move up that air pocket would expand.
Of course if anyone could stand to eat Uni for two days straight, I would believe they were tough enough to hold their breath till help arived.... that stuff is nasty :P.
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Originally Posted by rgoode
