gradient factors

I just watched the great presentation of David Doolette at RB4 on alternative decompression strategies (Advances In Decompression Theory And Practice). He shows a Navy algorithm that provides decompression schedules that are iso-risk. Interestingly they are similar to GF 50/85 for shallower...

I wonder why we use 2 gradient factors (GF low and GF high). Is there a reason to be more conservative at depth than near the surface? Why are we using 35/70 instead of 50/50 ? thanks, Nelson

With Shearwater supporting DCIEM upgrades for commercial and military applications, I thought this might have been discussed here but haven't found much with searches. I live and dive around Victoria BC, and have done some contract work on the boats that the Canadian Navy Fleet Dive Unit use...

OK guys and gals science question. The basic concept (not to get overcomplicated) of a Buhlman deco model is to achieve supersaturation of the tissues in the case of the ZHL16 and when one of the 16 compartments reaches the supersaturation limit a stop is generated to off gas that compartment...

Does anyone know which gradient factors my Shearwater diving buddies would set to match my DSAT? My buddies are lucky enough to have Shearwaters!

I am interested in knowing what are the theoretical and practical bases for planning decompression using gradient factors Low and High. That is, the reason behind choosing a Gf Lo and a different Gf Hi. Why ZHL-16C 40/70 and not ZHL-16C 70/70, for instance. The reason for introducing Gf (lo)...