Plan Dive -- thoughts

[Steve Butler]

On 03/02/2015 10:15 PM, Joakim Bygdell wrote:

... snip ....
> If you look at how the plan looks like when it is initialised with the 
> box unchecked,
> the first line represents your descent and that is the one that gets 
> discarded when you check the box.
>
> Maybe we need to clarify this in the manual a bit more
> The way the “Drop to first depth” is designed is that it takes the 
> data from line 2 and assumes that you drop like a stone to that depth.
> * If you intend to use the “Drop to first depth” it should be checked 
> before you start adding waypoints to your plan.
> This is only useful if you are diving from a boat or a place with deep 
> water close to shore.
> If you start your dive from shore the box should be unchecked. 
> Otherwise subsurface can’t do proper calculations for your long and 
> shallow descent.
>
> * Each line in the planner table is the position of a waypoint and 
> represents the end of a segment.
>

That is an important distinction originally lost on me.

>
> Another thing you can do is to check the box for “Verbatim dive plan”.
> Then there will be a description of you dive in plain text.
>
> For your example dive it looks like this:
> Transition to 130 ft in 1:58 min - runtime 1:58 on EAN26
> Stay at 130 ft for 5:02 min - runtime 7:00 on EAN26
> Transition to 70 ft in 2:00 min - runtime 9:00 on EAN26
> Stay at 70 ft for 10:00 min - runtime 19:00 on EAN26
> Transition to 0 ft in 4:09 min - runtime 23:09 on EAN26
>

I was noticing that in the box to the right.  Looks nice and helps 
clarify what is happening.

>
> If you let the planner know which cylinder you are intending to use as 
> well as your SAC
> (which subsurface can calculate for you if you add the cylinder size, 
> start and end pressures of the dives that you import)
> you get this little treat at the bottom of the Dive plan details.
>
> Assuming AL80.

HP 119 with 28%       :-)

... snip
>>
>>>>>
>>>>>> Oh, and option to pick between 15 or 20'.  I noticed only 20' was 
>>>>>> set as the last stop.
>>>>> That is because the planner used 10’ increments in its internal 
>>>>> calculations.
>>>>> And the planner will only calculate what reamins on the ascent 
>>>>> after your last waypoint.
>>>>
>>>> OK.  How about another check box to "include 3 min safety stop at 
>>>> 15 feet" at the end of the dive.  At least that is what is being 
>>>> taught in PADI.
>>>
>>> That might not be to hard to implement.
>>>

I'm still interested in that option.

Thanks
--Steve
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