Entry level trimix vs. Advance Trixmix

[exodusmaximus]

I was thinking about doing that as well but here in Victoria, Australia we do most of our tech dives in the 45-55m range on air (in our backgas). Not the best Idea I know but helium costs a fortune ($200+ to fill 12L twins). Without being rude I'm not interested in anyone telling me that it's not safe. I know it's not ideal but I'm pretty sure I would not have access to dives in the 45-55m zone if I don't do extended range. The dive charter services will not let you dive to depths your not qualified for. And I think if I only had my Normoxic (without ext range) they would only allow me to to a dive past 45m+ if I was on helium. Need to check up on that though.

There is nothing wrong with diving on air to 55m

 

[steinbil]

Wow, nice thread resurrection! And with equally bad advice as the OP got (Air at 55m to hypoxic trimix at 100m with several stages sounds like a great progression - not!).

Air at 55m has a gas density of 8.37g/l, significantly higher than the "hard maximum" of 6.2g/l recommended by Gavin Anthony and Simon Mitchell after their research on gas density and CO2 retention.

 

[Tracy]

There is nothing wrong with diving on air to 55m

14 years to come up with a reply and this was the best you could do?

 

[Lorenzoid]

14 years to come up with a reply and this was the best you could do?

And it's been 10 years since the OP last logged on.

 

[tursiops]

14 years to come up with a reply and this was the best you could do?

Possibly he's done too many dives to 55m on air.....