The flip side of that is the air is coming up very fast and tends to
lift anything around it. Have you ever seen a pneumatic dredge pipe
Your sailor is also supposed to be wearing a type 1 PFD that adds a
lot of buoyancy.
Long, long ago and far, far away part of my misspent youth involved
surfing fairly large waves.
My experience was that the best thing to do while you're in the white
stuff underwater is to relax as completely as possible to conserve air
and swim for the surface only after the white stuff has passed - because
there just is not enough buoyancy or purchase in the white stuff.
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