Any diver can pull off a static that is 1'30" less than his maximum, even with no training. For example an 8'00" diver should be able to do 6'30" with no training. So an 11'35" diver should manage at least 10'05" with no training. But only 8'01" ? Sorry, that is all the evidence I need. Case closed. So now we know that without O2 he can make 8'00", just like all the other top level athletes in the world.