What’s the most serious condition a diver can experience underwater?

DCS (bends), narcosis…?

It’s probably  Diver panic, for that simply reason that when a diver starts to panic he/she looses all rational thoughts. In most cases the irrational thinking renders the diver giving self-help nearly impossible. The diver is not able to ‘think there way out of a problem’; below is an example:

You’re diving a famous wreck in local waters, the depth of the wreck reaches 40m and also the visibility is about 10m. The pre-dive excitement and anticipation are high while you go into the water, once you and your buddy reach the wreck you are overwhelmed by its size… Both of you spend the next couple of minutes swimming around the wreck until suddenly you look around and can’t call at your buddy. Then your dive computer starts to beep as you run out of bottom time, you understand your far from the ascent line; so you make a made swim for it. Inside your » Read more: Diver Panic