Gradient Factors and Deep Stops

[leadduck]

How do your comments relate to Buhlmann ZH-L16B, and C? It's my impression that ZH-L16A was thought to be too liberal in the middle compartments for common use. M-values were reduced in several compartments for ZH-L16B, and it was suggested for table calculations. M-values were further reduced in many compartments for ZH-L16C, and it was suggested for use in dive computers. Seems like most, but not all, dive computers run C. The most popular computer running Buhlmann with GF has a recreational preset with a GF hi of 95.

I think you're right about B and C. Using a dive computer with GFhigh=95 is a lot less conservative than using the table, particularly in cold water where the table diver reads the table at the next longer bottom time, or at 150% of bottom time in case of exertion at depth (Deco2000 application rules). Later they developed ZHL8ADT for dive computers that considers temperature and exertion, although the latter is difficult to measure.