Gasoline floats
It was used in bathyscaphes in the old days for buoyancy under pressures that would crush an air-filled float. Jet fuel doesn't float as well, but it has a specific gravity of about .8 or so.
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It was used in bathyscaphes in the old days for buoyancy under pressures that would crush an air-filled float. Jet fuel doesn't float as well, but it has a specific gravity of about .8 or so.