billfish678 said:
This. Deep water diving is already challenging, because you have to be aware of your surroundings so you don’t get in trouble, get tangled up in a line, get eaten by a shark (if they’re around), get lost, lose your sense of direction (up/down esp), and monitor your oxygen use and your depth, and time at depth, because you have to time your return trip with distances and wait times to prevent the bends. All of that requires good thinking skills. But at deep depths, the very air you breathe is impairing your thinking. It’s like drinking a shot of whiskey a minute. And the harder you breathe, the drunker you get.
Everyone knows how alcohol impairs judgment, and how you might end up drinking more than you intended because you lost track, or as you got drunk you couldn’t retain the clarity to stop when you knew you should. Well, now imagine that you are doing that in an environment where a bad decision will kill you. Say, driving home from the bar, but someone is giving you a glass of whiskey every mile you drive, and you have to go 20 miles.
He could have just turned around and left at any time (until his light got tangled). When the body came free from the dirt, it was tied to the line and could have been retrieved, he no longer needed to bag it. But he couldn’t think straight, he was so intent on bagging it, that he was struggling too hard and breathing too hard. Drunker, drunker, drunker. When he finally did give up, he was tangled in the lines, and didn’t have the presence of mind to cut anything, even though he had shears in his hand.
He knew what was happening (gas affecting him), he knew how it should affect him, he knew he needed to stay calm and work slowly, he knew that if anything went wrong he could easily die, and had to know (as an experienced diver) that getting tangled in ropes the first thing you do is start cutting them, yet it wasn’t enough. I just don’t think there’s any preparation that can compensate for [drunk talk] “and Ih’ll havvve anuther” [/drunk talk].
That’s the really challenging part, deciding how to adjust to changing circumstances. That’s where experience and training and preplanning for contingencies can all greatly aid the outcome. If you know what could go wrong, and know how to recognize it, and how to react to it, you’re in a much better position than just having a default plan and expecting to wing it - especially if you are a noob.