QUESTION: Does GF start use deepest ceiling per tissue or whole dive?

[dylan-smith]

For any given time/depth in the dive, in order to calculate the current GF % we are using to calculate the instantaneous ceiling, we need to know what depth GFLow corresponds to (GFHigh always corresponds to the surface).

The calculation I'm using is that the deepest observed ceiling on the dive is where GFLow is.

The question is, do we use the deepest ceiling on a per tissue basis, or does every tissue ceiling calculation use the overall deepest ceiling observed?

Currently I've implemented it to use the deepest ceiling on a per tissue basis. Which means that if we set a GF of 60/85. At a given point in the dive Tissue 1 might be targeting a GF of 70% for ceiling calculations, but tissue 10 might be targeting a GF of 80%.