>In Sydney, the use of nitrox from what I have seen is restricted to >deco gas. The rest is done on air. > >Cylinder markings vary, but are a carry over from the US where O2 is green. >Here O2 is black with white shoulder. > >What I am trying to get divers I dive with to do is just mark the tank in big >letters/numbers with the MOD of the mix. That's all that matters. > >Rod Nairne. In Japan Air must be in a grey tank with a green band . This is a national standard and unless your tank has a current hydrostamp they wont fill it. This is a good idea its the rec scuba guys who make the mistakes so if the air tanks are identified and the shops will only put air in this color tank the dangers to the resort diver guys are minimised. The only nitrox i've seen here is for the Fiena its a semi closed circuit nitrox rebreather and it only uses 3 l tanks. thebob@aq*.be*.or*.jp* (Bob)
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