Unless you're very skinny or very fat, body density is close to sea water. Lung size, amount of neoprene and the type all have a bigger affect on buoyancy. If you take off about seven units of fat, you take off one unit of lead at any depth. The same 7 to 1 ratio is close for feet/pounds at 30-50 feet.
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Aloha Bill
A man is wise, only to the extent that he is aware of his own ignorance. Bill Bonner '08
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