[PATCH] Use gas_mod helper instead of local version

[Dirk Hohndel]

On Tue, Jul 01, 2014 at 07:41:32AM +0200, Henrik Brautaset Aronsen wrote:
> Robert C. Helling wrote:
> >I would leave it that way as (at least to me) EAN50 at 21m and O2 at 6m is somehow wired directly into my brain and those two assume 1.6 and not less. In particular the planner would switch to pure O2 only at 3m which I don’t think anybody does out there in the real world.
> 
> +1

I think most sane divers (ok, most divers who think like me, I am sane by
definition, so therfore...) use 1.4 for bottom gas and 1.6 for deco gases.

Making 1.6 the default for all gases is odd - but making 1.4 the default
is far worse as it doesn't get the expected result for deco gases.

/D