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Thalassamania:
There was a bladder filled with air that defused through a porous plug made of (I kid you not) "Element X". As gas defused through (or out) it moved the indicator needle to allegedly tell you your decompression status. Not dependable or safe.evad:Thanks (I don't know to do a link). How was it supposed to have worked ?
Thalassamania:(I kid you not) "Element X"). QUOTE]
Thanks again.