SurfGF tells me my GF if I were to be instantly transported to the surface. It was my original assumption that that value represented a theoretical maximum GF value since because in reality, as I ascend, I would be off-gassing during the ascent so the actual GF that I would have after surfacing could be no higher than the value that I had read at depth.
However, as we know from learning about deep stops, it is possible to still on-gas in some compartments even though you have ascended from your maximum depth. Therefore, I am wondering, is it not possible that you could surface with an actual GF at the surface that is GREATER than the value you read before you started your ascent which would in a sense defeat the purpose of knowing your SurfGF at depth?