(December 7, 2014 at 9:27 pm)Stimbo Wrote: Well, there is a story about the James Bond film Thunderball, in a scene of which Sean Connery uses a tiny oxygen cylinder device to survive an underwater swim.
Something similar actually exists, though not as small as in Thunderball. Tell you what though, as an experienced deep diver, I would not ever carry one - my redundant tank has between 5 and 40 times the capacity - and is usually strapped to my dive buddy's back. I have no delusion that there's enough air in one of those tiny tanks to get safely to the surface from 40 meters depth.
