Plan Dive -- thoughts

[Steve Butler]

On 02/27/2015 10:54 PM, Joakim Bygdell wrote:
>
>> On 27 Feb 2015, at 21:23, Steve Butler <kg7je at comcast.net> wrote:
>>
>> Now, as an OC rec diver (soon to have access to the 100-130 depths) I would not want to enter the ascent segments separate from spending time at a level on the way up in order to indicate to ascend at best rate.  Take this scenario:
>>
>> Drop to 130 and hang there for 6 minutes (28% O2).
>> Rise at 30'/m to 70 and hang there for 8 minutes on the ledge.
>> Ascend at 30'/m to 40 (no wait as it is a transition to an upslope.
>> Spend 5 minutes swimming the upslope to 15.
>> Spend the standard 3 minute stop at 15.
> As this is a multilevel dive you have to do some calculation on your own, i.e transition times between the levels.

That is what I was hoping to avoid.  Especially as we entice more newly 
certified OW and AOW divers to use Subsurface.  Use of the printed dive 
planner and the eRDP both assume the transition time is included in the 
"level" time.
>
> Final Depth	Duration	Runtime
> 130			2		2			descend
> 130			6		8			level
> 70			2		10			ascend
> 70			6		16			level
> 15			5		21			swim upslope
> 15			3		24			stop
>
> When you do that the ascent rates that you can set tin the lower left cornet of the planner will not be used.
> The descent rate will be used only if you check “Drop to first depth”. And in this case it will replace the first two lines with this.
>
> 130			8		8
>
> Containing both the descent time and the time spent at 130’.

This is what the OW rec diver expects to enter.
>
>> 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.
>
>
> Compare how the planner works on your example vs. a blue water ascent profile.
> The only thing entered into the planner is this line with “Drop to first depth” checked.
>
> Final Depth	Duration	Runtime
> 130			13		13
>
> In this case the planner will tell you that the calculated ascent from 130ft, using the defined ascent rates, will take 7minutes.
>
>
>
> Multilevel dives you have to define all waypoints for all the levels, until the start of the ascent that contains your safety stop.
> In the first example if the upslope didn’t exist your last waypoint would be @ 70’ and the planner would calculate the ascent time to the surface.
> Since you don’t have any deco obligation it will tell you that you can ascend to the surface using the defined ascent rates over a time of 4min.
>

Would still want the option to add 15' 3 min safe stop without having to 
calculate the ascent times.
> /Jocke 

--Steve