Settings for deepstops

[Andr]

I've had the OSTC for one week and tested it during 2 real dives and several PC simulations.

I've seen that the OSTC isn't capable to do deepstops (like the "Pyle"). Because of the proven importance of deepstops I wonder if it's possible to introduce a formula or what are the custom settings to have deep deepstops? Example: Dive at 50m, first deepstop at 30m

Another question: I see you are investigating the possibility to implement a wireless tanksensor. Any idee when the first sensor will be available? Do we need another OSTC then or not?

I've also noticed that the OSTC doesn't give a message/signal when you have to change to decogas. Is this normal?

[Tonio]

Hello,

For the DS you have the GF.

Regarding the benefit of DS, you are speaking of air/nitrox or trimix ?

Cheers,
Antoine

[Andr]

I tried the GF mode with 30/90 but I didn't had any difference with B?hlman
I tried with G1: 21/0 G2: 80/0
with G1 always active and first gas
I tried several simulations with G2 active and not, with switch at 8m or not
but no difference
I have to say the decostops were not that big
9m: 1min
6m: 2min

sometimes 12m:1min appeared and aftere some seconds at same depth it dissapeared again!!

thanks in advance

[champollion]

Only because you don't stay enough at the bottom
With so little decostops you won't see any difference.

Simulating with MVplan 15minutes at 50meter :

GF 80/80 (I use with air dil) : 1min at 9, 2at6,4at3
GF 30/85 (most used with He dil) : deco starts at 18meter.
If you still want deepers stops put him 15/80 you'll have first stop at 24m.

[Andr]

i see

nice tool MVplan btw

thanks for the answer.

Is it normal the OSTC doesn't give you a sign when you have to switch gas?
I know if you plan your dive you know when to switch but a signal would be usefull.

[heinrichsweikamp]

Hello,

Maybe we could implement a blinking gas display showing that a "better" gas is available for this depth?

regards,
Matthias

[champollion]

Yep, that's the way of working of the shearwater pursuit, you still can refuse to change.

Like here the TTS is calculated "as if" all gasses will be used.

[wrobell]

Andr? Wrote:
-------------------------------------------------------
[...]

> I've seen that the OSTC isn't capable to do
> deepstops (like the "Pyle"). Because of the proven
> importance of deepstops I wonder if it's possible
> to introduce a formula or what are the custom
> settings to have deep deepstops? Example: Dive at
> 50m, first deepstop at 30m

as pointed by others, you need to look at gradient factors.

imho, it is worth to read baker's article about deep stops: http://www.dirdiver.co.uk/index.php?Ite ... &task=view (pdf version http://www.ddplan.com/reference/deepstop.pdf)

it contains some nice graphs showing the difference between "just" deep stops and deco stops using GF.

[...]

[sailor]

Hi,
i`m using GF 5/85 to make my profile as close as possible to my budies VR3 and like this my OSTC calculates much deeper deepstops, of course depending the profile and gas used.
My DS`s are still not as deep as the VR3 DS`s but they come much closer compared to GF 30/85.

[PeterT]

here's an interesting article about GF!

http://www.archeonet.org/sub/biblio/Wat ... ummies.pdf