Wish I were closer.
Down here in
hurricane alley, we get practice refloating sunk
boats. I have several
commercial type flotation bags which you put in various
parts of the
boat, then inflate them. You can use scba
tanks or an air
compressor. Placing the uninflated bags is hard
work, plus they must be placed so they will
lift the boat evenly.
I have used a Harbor Freight, oilless compresser, powered by a cheapo two stroke
generator, slow but it works.
Be sure the divers are in a safe location because when the suction breaks, they can come up fast.
Good luck,
Tom