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Steve Millard <ec96@li*.ac*.uk*> wrote:- > The CO2 scrubber stack normally uses sodium hydroxide, which give about 6 > hours of diving, at any depth. Lithium hydroxide can be used to extend this > time to 8 hours, but has cost and handling penalties. Alias caustic soda, not welcome to the dustman if tipped in with ordinary mixed rubbish after use! And, if scarce elements like lithium or barium are used, there should be a way of recycling them. > The cost of a pre-packed scrubber canister was estimated at about 8 pounds > (English currency), giving a dive cost of 2 pounds/hour, including > helium/oxygen gas costs. How much would it cost for the diver to buy his own absorbent in bulk and refill his set's canister himself? > The Cis-Lunar must be returned every 2 years for a mandatory service. This > is expected to work out at about 300 pounds (I think), *including* the cost > of replacing all 3 O2 cells. How will they enforce the `must'?, if people decide to make a period between servicings last a bit longer than recommended. > If you lose gas from the system by excessive mask clearing, breathing out > through the nose ... the two litre diluent cylinder will be quickly emptied. Can it be bought with a fullface mask? > ... a wings-type BC ... Is the wings absolutely necessary? Or can it be worn in an ordinary backpack harness?
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