lobo-hotei Wrote:
-------------------------------------------------------
> I can see the efficiency isssue but a 1 kilogram
> battery is about 2 1/4 lbs. Heck the diver can use
> the batteries as his weights just have the system
> run off a series of the batteries instead of a
> single battery.

As a PADI Rescue Diver might I ask what happens if the diver has to drop his weights?

I'm really weary of this type of thing, knowing how many fatalities there are every year from closed circuit rebreathers (which 'scrub' the carbon dioxide out after the diver has exhaled, so he can breath it again), and that’s before we even thing about the deaths using tri-mix... hrm I'll leave it well alone for a while.

The other thing that concerns me about this is how much air can this extract feasibly? As you get deeper in the water due to the pressure of the water the amount of air contained in a lung full is far more than at the surface. So at 10meters you use twice as much air as you did at the surface, at twenty meters you use twice as much as you did at 10 meters. So as a conventional diver gets deeper the less time their aqualung will provide them with air. So in a nutshell… how deep could you go before the device could no longer keep with demand?

Anyway that’s me just being a grouch! Its an interesting invention.

MikeS