[PATCH] Planner - change timestep to 2 seconds

[Rick Walsh]

On 22 Jun 2015 8:16 am, "Steve Butler" <kg7je at comcast.net> wrote:
>
> On 06/20/2015 06:25 PM, Rick Walsh wrote:On 21 Jun 2015 11:19 am, "Dirk
Hohndel" <dirk at hohndel.org> wrote:
>>
>> >On Sat, Jun 20, 2015 at 11:17:28AM +1000, Rick Walsh wrote:
>> > > But what about me?  I like SI units and whole decimals.  Don't
worry, 2 s
>> > > timesteps fit nicely when using 10 m/s ascent rate (18 s between
stops).
>> >
>> > I don't know about you, but when I dive we usually do our ascends a
little
>> > slower than this. Something like 20ft/min or so or (coincidence:
that's 3s
>> > per foot) but definitely slower than 30ft or 10m per minute. Which
means
>>
>> Haha oops. 9 m/s is pretty fast. Replace m/s with m/min and my commit
mes.sage might make more sense.
>>
>>
>
> My DC complains at anything over 30 ft/min  (9m/min).  PADI open water
suggests max of 60 ft/min.  I'm hearing rumors this may be dropped to 30
ft/min.  So, I'd say this should be the max rate to which it is set.
>
> Also my DC records every 10s.  One of the DCs i'm looking at does 5s
intervals.
>
> How would this work comparing the pre-dive plan with the post-dive
profile?
>

The change has nothing to do with setting or limiting an ascent rate.
Currently the ascent to the next stop is done in 3 second increments. If
you ascend at 30ft/min (Subsurface default, which matches most DCs) it
should take 20s to ascend 10ft. But in 3s increments it is bumped out to
21s. No huge issue but it makes the calculated plan have some odd runtimes.

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