You re-calculated your exit gas for Olson or for the entrance (exit you came from)?
Recalculated to return to "my exit" where my reel is. I'm only headed to Olsen if I am so low on gas that I think the shorter path to a non-verified exit is my only hope.
There are arrows which point to air domes (with no exit at all) in Mexico. (downstream Choc Mool, 1/3rd of the way to the big stalagtite, its just a tiny hole in the roof above an air dome, and in fact its name is "emergency air cenote"). Obviously you only follow those if you have no other choice.