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Larry
 
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wrote in
ups.com:

I have also considerd adding foam floatation to my boat. She has many
little areas that are never used for anything whose total volume might
be enough.



Airbags deployed with liquid freon would be very compact to store, non-
flammable and storage is at low pressure, unlike CO2. That'd work as soon
as you got past the government bureaucrats hell bent on maximizing freon
profits for a few big chemical companies.

My last batch of R-12 smuggled in from Aruba was made in Tennesee! We
Americans just can't buy it.

--
Larry