Are you using the recreational dive interface?
Yes, only the rec mode interface.
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Are you using the recreational dive interface?
Thus, you should not program a lower number at all. Dive a 75/75, 80/80, or even a 50/50 or whatever. Again, since you are NOT doing decompression dives, any settings for GF are completely irrelevant anyway.
It's very interesting to me you're telling a quintessentially recreational user they need to abandon OC Rec mode and go into OC Tec mode--and start diving radically different GFs than Shearwater sets as a default or even offers as a Rec mode option. The idea one should be diving equal Lo and High GFs for *NDL* diving...is a bit nuts. If your GF lo is 45, you're going to have significantly shorter NDLs than if you're diving 85/85.
I understand what Peter and ADD Helium like to teach, but I think your suggestion is a gross oversimplification (at best) for NDL air diving.
I The idea one should be diving equal Lo and High GFs for *NDL* diving...is a bit nuts. If your GF lo is 45, you're going to have significantly shorter NDLs than if you're diving 85/85.
This is the problem with recreational divers buying technical diving computers. The Petrel will not prevent you from hurting yourself. It will not provide you any warning and it will not advise you against making stupid decisions. Gradient factors need to be understood in order to be set appropriately.
In very general terms, the low/high factor system should be used by technical divers only. If you're diving within NDL then set both numbers to the same amount and any number less than 100% will give you conservatism from the M-value of a controlling compartment.
Are you trying to tell us that a recreational diver cannot be safe by selecting one of the conservatism factors that Shearwater programs in for their recreational OC diving mode? Even if you are not getting into deco, the different conservatism choices affect the NDL times allowed at any given depth. They ALL seem to be more conservative than my Oceanic computer!
Mike
Are you trying to tell us that a recreational diver cannot be safe by selecting one of the conservatism factors that Shearwater programs in for their recreational OC diving mode? Even if you are not getting into deco, the different conservatism choices affect the NDL times allowed at any given depth. They ALL seem to be more conservative than my Oceanic computer!
Mike