[PATCH] planning: Add option to have last stop at 6m/20ft

[Anton Lundin]

On 02 April, 2013 - Dirk Hohndel wrote:

> Anton Lundin <glance at acc.umu.se> writes:
> 
> > When diving in areas where there are risk of boats passing above you,
> > its common practise to do the last stop at 6m to better stay out of
> > harms way. When doing o2-deco, it doesn't matter for the deco time if
> > you are doing all the time at 6m, due to that you don't have any inert
> > gas in your breathing gas.
> 
> I'm not sure our deco algorithm agrees with you...
> 
> Try this dive profile:
> 
> 50m  5 min 16/50
> 50m 10 min
> 
> (GF 30/70)
> 
>   90 min dive time without the box checked
> 1933 min dive time with the last stop at 6m
> 
> Admittedly, I think that shows a bug in our calculations somewhere, but
> still, I'd call this a bit more than "doesn't matter for the deco time".

And just for comparison i ran the numbers in decoplanner just to check,
and its kinda in the same ballpark, but that doesn't mean its right.

The flip-point is if you move GFHigh between 73% and 74%. I don't know
the internals of Buhlmann to say anything, but it smells fishy.

//Anton

-- 
Anton Lundin	+46702-161604
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