[Patch] Fix planner notes gas change output logic

[Dirk Hohndel]

On Thu, Jun 18, 2015 at 02:57:59PM +0200, Anton Lundin wrote:
> On 18 June, 2015 - Dirk Hohndel wrote:
> 
> > On Thu, Jun 18, 2015 at 08:16:36AM +0200, Robert C. Helling wrote:
> > > 
> > > BTW this whole discussion is a bit academic: gas switches without stop that we are worrying about do not appear in real dives. As no stops come with short shallow dives for which you would not take additional gases. Or we could resolve it by stating a gas change is automatically followed by a stop of at least one minute. After all the gas change takes some time. Not to mention esoteric topics like the oxygen window. 
> > 
> > In TDI training you will switch to your "low" deco gas as deep as
> > possible, usually before the first stop. We often dive with trimix, EAN40,
> > EAN80 and the switch to EAN40 will be at 80'/25m or 100'/30m (depending on
> > whether you decided on pO₂ of 1.4 or 1.6 for the deco gas). Which tends to
> > be before the first stop.
> > 
> 
> I don't really see why some training agencies push such a policy,
> especially if the mod is quite a bit deeper than the fist stop.
> 
> We usually just switch at whatever the fist stop after the mod of the
> deco gas is. No reason to stop the whole team and do the switch.

Switch is done in transition. No stop. And the rationale is to start
breathing the higher O2 as early as possible.

> I know that some divers "on the fly" but I'd say thats a really bad
> idea. Which gas you're breathing is really important and we always
> require the other team members to verify the gas switch before starting
> to breath that gas.

Yeah, that's not part of the procedures we teach. For better or worse.

/D