[PATCH 2/2] Ticket #831 Fix

[Davide DB]

On Tue, Mar 10, 2015 at 6:52 AM, Joakim Bygdell <j.bygdell at gmail.com> wrote:
>
> The default cylinder setup is more suited to people that do not dive the way you do, since the way you describe it you rarely start a dive on backgas.
> It's just a way to make it convenient for people that doesn't have as complex setup.

I see, but I'm nearly sure that the whole procedure was ok until few
releases ago.
I remeber Dirk had a brilliant idea and modified how the cylinder table works.
Maybe the introduction of the tank index put some strict constraints
again or maybe I was doing exactly the same sequence each time. Now
that I have "convinced" several friends to use Subsurface, my phone
keeps ringing and ringing :)

>> In my above example:
>>
>> I made a formal gas change at the surface switching to a 35/25
>> At 30m I switched to my bottom mix: 16/60 on a AL80 [**]
>> Deco was performed on 35/25, 50/20 and 100%
>> My backgas was a D8,5L on 16/60 (that is set as default tank in
>> Subsurface). It's my bailout reserve, my main tank.
>>
>> [**] I could have more f this.
>>
>> Should I remove the default cylinder to be able to switch at 0 at 0?
>> If I had a proper DC managing all of this and I forget to press a
>> button, could I fix all of this later? Hummm....
>
> When you set up the cylinders for that dive make sure that the one you start with are the first gas in the list, the order of the other mixes is not as important.
>
> At the start of the dive subsurface will implicit start you on 35/25 as that is the first gas in the list.
> You can then do gas switches at the appropriate time points during the dive.
>
> If you do this, is it something that is wrong in the way the dive is presented to you?

I have to try.
The gas change at 0 at 0 was suggested here to overcome the default cylinder.
I should completely remove default cylinder. Its' a shame. Default
cylinder along copy-paste are two useful tools to speed-up logging
operations.
When I get stuck in some dead, usually I directly edit the xml file
but two friends of mine who are Subsurface new adopter were caught
immediately into the "current gas is in use..." dead end without being
able to solve it.
Copy-paste was a Linus brilliant idea to avoid inserting each dive all
the tanks. Others (like me) suggested having predefined cylinder sets
saved into user preferences but this solution implied a whole new UI
and Linus solution it simple and effective.
Currently it become a dangerous option because if you copy-paste a
slightly different tank set your gas changes will likely get screwed
up mainly because the cylinder index get copy-pasted too.

Why it's compulsory to have a cylinder into the cylinder table?