Blackwood
Contributor
So are the people with actual decompression diving experience lining up to say that it is reasonable to use a Cobra 2 to plan and execute decompression dives? Or are you lining up to say that it is risky to plan and execute decompression dives with a Cobra 2, and that its management of decompression stops is best used as a safety feature for when a planned no-decompression dive ends up being deeper or longer than intended?
Just looking for some consensus here.
I find the terminology rstofer used to be apt.
The Cobra (et. all) as it relates to >NDL is for those 'oops' dives.
I haven't used the model(s) in question, but I doubt you can plan a >NDL dive with it. Rather, if you exceed NDL, it kicks into some hyper conservative mode that holds you in the shallows and then keeps you out of the water.
If planning >NDL dives, use models like the VR3 and the X1. "Recreational" computers simply aren't designed for it.
ratio deco ... as I understand [is] an aggressive approach to calculating deco obligations
At the risk of inviting another 30 pager...
Ratio Deco is actually fairly conservative (from an obligation standpoint. You can argue the application of oxygen vacancy to the profile if you like). It scales well with GF buhlmann models (upon which it's essentially based), and is conservative compared with bubble models (like VPM).