Don Burke:
The big one that sticks out the most was Bernie ascending into DCS because none of the gasses available were deemed suitable for decompression.
that's not as i remember it.
bernie was over-breathing his reg, and could not find the ascent line. he
was running low on gas, and rather than try to find the ascent line or
shoot a bag, he decided to simply ascend. he swam about 1500 feet
at 150 feet looking for the line.
at that point, he was probably suffering from tunnel vision and WANTED OUT NOW,
in addition to being physically and mentally exhausted.
logic sort of goes out the window. he figured: i don't have enough gas to
do full deco anyway, might as well bail now and get to the surface.
a more logical plan would have been: i'll do deco for as long as gas lasts and
then ascend.
but again, he was probably suffering from tunnel vision. i've been there
under much less stresfull conditions, and it's hard to fight that urge
to-get-out-NOW