dive planner update

[Robert Helling]

On 27.06.2013, at 14:51, Dirk Hohndel <dirk at hohndel.org> wrote:

Dirk,

> I think for the part of the dive profile that the user enters we should
> not enforce standard vertical speed. Your code does something that I
> find quite unintuitive. If I enter a point at 4 min / 10m then I believe
> Subsurface should show a slow descend to 10m over 4 minutes. Not an
> extremely rapid drop down to 10m and then 3:40 at 10m. If that was what
> I wanted, I would have entered a first data point at 0:20 / 10m.

I think that's a matter of taste. And of course, you are the boss.

But in my experience, in the large majority of the cases people would use a planner, the plan would be something like "Let's plan a 30minute dive at 35m". And I think this should be easy to enter (i.e. require only one click). That's at least how I usually think of my dives, even for shore dives: Go to some depth and stay around there for some amount of time (e.g. until my computer shows x minutes of deco). Then ascend, possibly not at the maximally possible speed but usually I start by going to max depth first (and reasonably fast) and then work up from there. 

Needless to say, that does not fit all cases and having a more general descent should be possible but I would opt for the other as default.

YMMV
Robert
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Robert C. Helling     Elite Master Course Theoretical and Mathematical Physics
                      Scientific Coordinator
                      Ludwig Maximilians Universitaet Muenchen, Dept. Physik
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