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They recommend to 64msw 18/54, instead of the 18/35. If you then switch to EAN50... the pn2 differential is big enough to not like it (at least myself).

Exactly. And here is where I dont really agree with the tables. They recommend too much He in the normoxic range, where usually only one switch is done and therefore the pn2 differential is too big, in my opinion. I totally agree with your point of view.

You are totally right, but look at the tables. They recommend an He mix of 54% for a dive to 60msw. If done as it is usually done, with one switch to EAN50, the PN2 differential is much bigger than with a 18/35, and there is where I see a problem. Another gas is then needed or just to use the...

I must say I'm not as happy as some of you with these tables. IMHO increasing the He will increase the price of the mixes, but also is an important driver of IEDCS because of counterdifussion. Now the gas switches will have a bigger PN2 differential, and thats an important factor. The tables...

For those of you interested: BSAC recommended diving gas mixtures for open circuit diving I find it interesting but controversial for two reasons... It may improve (I still doubt it) the safety on one side, but on the other...more He= more $$$ and richer He mixes when switching to Deco gas...

I do have plenty of free time. I work a 24hrs shift and then I have 5 days off..... and it is a lot of years of diving!

Hi everyone. Paramedic, more than 12 years diving, Trimix diver and photographer, around 3000 dives. I speak spanish and english and I love to travel and dive all around the globe. Cheers!