Have you ever even been inside a U-boat wreck, because that stupid talk smacks of complete ignorance of what it entails.So you conclude that taking too long to get free from debris, being unable to follow their line out, having trouble finding the exit, not finding their stage tanks, was all just bad luck and had nothing to do with the fact that they had high workload and stress for 30min at 70m/230fsw on air and were certainly severely impaired from nitrogen narcosis?
P.S. They actually done very good to get out.