TM 5-4220-226-14&P
1-16. Flooding.
It is very unlikely that the diver will ever flood out the helmet. The demand regulator keeps a slight over-
pressure in the helmet, preventing water entry. However, the diver should practice clearing a flooded helmet to
build confidence and knowledge of the situation. Should flooding occur, increasing the steady flow air supply
will stop or reverse the helmet flooding.
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