Quote: (Originally Posted by jluttichau)
Hi,
I've been wondering about this Suunto RGBM thats in the Vyper and Vytec. When I see guys on the shotline comming up from 45m 30min dives and going streight up to around 12 - 18m and starting deco there and doing most of it at 3 and 6m on O2.
It seems like a haldanian model to me. When i run the same dive through GAP, the deco schedule is very different from what I've seen the Suunto computers produce?
Any explanations?
Cheers
Jonas
Yes
Sunnto's RGBM profiles are to RGBM what a Pork pie is to a barmitsva menu
Why the makers of RGBM allowed Suunto to use their name in association with the Viper Vytec etc I have no idea.
However the thing with the Vytec is the ultra slow ascent rates promoted by the unit. Its the equivalent of the 1min in 3m stop principle of doing a 3m/min ascent. So its a combination of the ascent rates and the stops that make it work.
I used a Vytec to do some deepish dives on air back gas to 70m and on three gas using light trimix on the bottom and two deco mix and I got out OK but as per usual I was doing my 3m/min ascent voodoo.
Mainly I would use deco planner to run tables and keep the Vytec as backup. Running 20/80GF it would clear the 6m stop at about the same time as the tables on a square profile dive. However it was a crap deco computer as if you didn't ascend to the stop depths it wouldn't credit you for any stops added to the ascent but it would penalize you.
On some dives i would leave bottom with 30mins of deco and reach 6m 20mins later still showing 30mins of deco.
I had to bend it more than once.
ATB
Mark Chase