OSTC3, cR, sport and 2 :  heinrichs weikamp forum The fastest message board... ever.
OSTC's running hwOS 
OSTC SPORT. How can you compare conservatism levels?
Posted by: guyloup ()
Date: December 17, 2014 05:37PM

Hi, I am trying to find out the deco calculation that I would use for my own dives. Most of them are "semi advanced" recreational, this is max 42m and max 15 déco time. This is VERY far away from tek dives :-).

When I am simulating deco dives on the deco plan, using 115%/85% in Bülman or 20/75 in Buhlman + GF for a dive @ 28m for 30 minutes, the déco plan IS SO DIFFERENT THAT I HAVE A THOUGH TIME TO BELIEVE that the same conservatism scale was used. However in the OSTC sports, these are de défault for a +1 conservatism, as I can read from the manual on page 61.

On the single Bühlman one has 9'@ 3 m.
On the Buhlman with GF, one has: 1'@ 15m, 1'@ 12m, 3'@ 9m, 5'@ 6m and 13' 3m.

Now, I am not saying that one is right and the other is wrong, but I somehow have a problem that the conservatism level seems quite different in both deco plans.

Can anybody help me understand this discrepancy. I just cannot understand why these profiles are so different. I am, of course, not pointing at the "deep stops", this is what I want, but this is WAY OFF what I used to have in the past and what I see around me in recreational diving.

Options: ReplyQuote
Re: OSTC SPORT. How can you compare conservatism levels?
Posted by: heinrichsweikamp ()
Date: December 19, 2014 05:23PM

The two models are very different. The GF model results in a) much more deco and b) deeper stops.

Yes, 9min @ 3m seems to be a very aggressive (Short) deco compared to the GF deco plan, BUT that's the way this was used for decades in sports diving.

regards,
Matthias

Options: ReplyQuote
sad smileyeye popping smileyRe: OSTC SPORT. How can you compare conservatism levels?
Posted by: guyloup ()
Date: December 20, 2014 12:31AM

Since you claim that the OSTC SPORT is designed for recreational divers, one has to understand that only O2/N2 is used for these dives with rather small deco times. With Nitrogen as the leading gas, I believe that your choice of conservative CF looks a bit odd. Especially when one considers that the question of deep "deep stops" is still highly debatable. I would have preferred CF in the range of 60/80 (if not slightly more smiling smiley) for neutral conservatism. But I understand that there are different schools. eye popping smiley



Edited 2 time(s). Last edit at 12/20/2014 12:40AM by guyloup.

Options: ReplyQuote
Re: OSTC SPORT. How can you compare conservatism levels?
Posted by: max ()
Date: December 20, 2014 03:39PM

Hello. Probably you have already seen it yourself: in a previous thread beginning of Dec. (" Sport - gradient factor settings for conservatism" ), in which I asked about conservatism and GF settings for the Sport, Matthias replied "Maybe we add a "custom" conservatism where you can configure your own." Perhaps it will be implemented sooner rather than later if more people ask for it?



Edited 2 time(s). Last edit at 12/20/2014 03:41PM by max.

Options: ReplyQuote
Re: OSTC SPORT. How can you compare conservatism levels?
Posted by: guyloup ()
Date: December 20, 2014 04:20PM

Done as you suggested max spinning smiley sticking its tongue out

Options: ReplyQuote


Sorry, only registered users may post in this forum.
This forum powered by Phorum.