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#21
06-01-2005, 11:45 PM
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Re: Breath underwater without an air tank. -cool technology
[ QUOTE ]
True, but size will shrink in time and will also become more efficient. This device is new but it still greatly increases the amount of time you can stay underwater. Using an air tank you will have to get a new tank every 40 minutes or so. Tanks are huge. Here you just need a new battery or a power cord. Plus with 1 minute recharge batteries: http://www.toshiba.co.jp/about/press/2005_03/pr2901.htm SOLID STATE BATTERIES And even fuel cells The technology could evolve to let you stay down there all day. When SCUBA diving, 40 minutes goes by very fast. [/ QUOTE ] Obviously you don't dive very often or very deep. At 100 feet the amount of air in your tank is not the limiting factor. Nitrogen absorbtion is what you're really worried about on any dive > 30 feet (I assume we're talking recreational diving here). This won't do diddly for the amount of time most recreational divers can stay down. 
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#22
06-02-2005, 04:55 PM
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Re: Breath underwater without an air tank. -cool technology
[ QUOTE ]
Obviously you don't dive very often or very deep. At 100 feet the amount of air in your tank is not the limiting factor. Nitrogen absorbtion is what you're really worried about on any dive > 30 feet (I assume we're talking recreational diving here). This won't do diddly for the amount of time most recreational divers can stay down. [/ QUOTE ] Nitrogen narcossis is caused by breathing compressed air rich in nitrogen. Ever heard of Heliox? Your statement assumes that nitrogen and oxygen are dissolved in sea water at the exact same percentages as they are in air. It also assumes that this process will extract the oxygen and the nitrogen from the water at the exact same rates.
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#23
06-02-2005, 05:05 PM
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Re: Breath underwater without an air tank. -cool technology
[ QUOTE ]
[ QUOTE ] Obviously you don't dive very often or very deep. At 100 feet the amount of air in your tank is not the limiting factor. Nitrogen absorbtion is what you're really worried about on any dive > 30 feet (I assume we're talking recreational diving here). This won't do diddly for the amount of time most recreational divers can stay down. [/ QUOTE ] Nitrogen narcossis is caused by breathing compressed air rich in nitrogen. Ever heard of Heliox? Your statement assumes that nitrogen and oxygen are dissolved in sea water at the exact same percentages as they are in air. It also assumes that this process will extract the oxygen and the nitrogen from the water at the exact same rates. [/ QUOTE ] Wicked Smart!
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#24
06-02-2005, 07:54 PM
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Re: Breath underwater without an air tank. -cool technology
[ QUOTE ]
Nitrogen narcossis is caused by breathing compressed air rich in nitrogen. [/ QUOTE ] I wouldn't thing that nitrogen narcosis would be the problem, as that's generally related to extreme depths (much more than normal recreational diving). The problem would be getting the bends. Even if the gas mixture is the same as normal compressed air, the smaller equipment size will be a great improvement.
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