Dive planner MG, TP and FC

Ivan Wagner ivan.wagner at tecinvent.ch
Wed Oct 14 07:42:28 PDT 2015


I think there are two main applications here:

1. for tracking data with the current planner which calculates
everything in detail for every dive sample.
2. for bottom timer users which want to have an idea of the plan thus
calculations are really easy by just adding parameters such as stops,
SAC rate, depth and so on.

These are two different approaches. One gets integrated in today's
subsurface planner, and the other one could be a easy to use custom
calculator (like a normal math calculator) and it would be easy to
implement.

What do you think?

Ivan
On 10/14/2015 04:34 PM, Willem Ferguson wrote:
> On 14/10/2015 16:28, Willem Ferguson wrote:
>> On 14/10/2015 16:05, Robert Helling wrote:
>>> Hi,
>>>
>>>> On 14.10.2015, at 15:26, Willem Ferguson
>>>> <willemferguson at zoology.up.ac.za> wrote:
>>>>
>>>> This is the gas pressure in the cylinder at the start of the ascent
>>>> phase? This is a meaningful request but would require another selection
>>>> to be made in the planner (gas turn rule). This is something that I use
>>>> all the time in dive planning.
>>>
>>> what would that mean for the planner? Except for recreational mode,
>>> the planner always starts the ascent at the end of the manually
>>> entered waypoints.  Would you want to say something like “go to 80m
>>> and then figure out the pressure at which you have to leave 80m so
>>> you and your buddy make it to the surface with x bars remaining”?
>>>
>>> Best
>>> Robert
>>>
>>> -- 
>> Robert,
>>
>> Correct.
>>
>> Of course, actually, I commonly dive 230 bar and start the ascent at
>> around 90-95 bar, using thirds. So the 77 bars accurately constituting
>> a third is really a bare minimum and it is affected by deco
>> obligations.  But a message indicating "Ascent back gas pressure = 90
>> bar, i.e. within rule-of-thirds pressure (77 bar)" would be helpful.
>> It is an additional bit of safety information that checks the accuracy
>> of the deep section of the overall dive planning outside of
>> Subsurface. Does this make any sense?
> Of course you can see Ferguson' muddled mind here. In a strict thirds
> approach turning would be at around 140 bars in a cave. Reason for every
> bit of additional safety information from the planner. Fortunately I do
> not put my foot in a cave, otherwise I might consider turning at 90 bar!
> 
>> Kind regards,
>> willem
>>
>>
>>
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> 
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