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Last summer I performed an experiment which relates to the issue of free diving and the bends. I carried an old SOS decompression meter along on a free diving trip. These were sold in Canada by Scubapro back in the 70's? The details are a little blurry now but we spent 3or4 hours in the water with a maximum depth of 90 FSW. Average depth was considerably less than this maybe 50 FSW. I can't remember the total time underwater but it was probably in excess of 1 hour. Anyway when I turned the dive and started swimming to shore the decompression meter showed a significant amount of nitrogen absorption. If the meter was linear then with a somewhat longer/more aggressive dive profile I would easily have entered the decompression zone. This would have been compounded by the fact that after many hours of diving I was very dehydrated and had made many (many) fast ascents. I posted this experiment to rec.scuba last summer so maybe the details are archived somewhere. I would point out that I have taken this old Decompression meter SCUBA diving and compared it with my modern electronic dive computer. The 2 have always been in close agreement. Definitely something for free divers to think about. Barrie Kovish Vancouver, Canada bmk@ds*.bc*.ca*
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