the problem with the helmet filling up i stage diving f the air fails could be remedied by putting the airline low on the
helmet or at least adding a line to the inside that runs down the helmet closer to the neck. then the helmet
is more like an actual diving bell and the air within is trapped and won't go wooshing up the hose. make
sure there is some sort of guard on the end of the hose so you don't get a lethal hickey if it does fail.
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