My thoughts and prayers go to the divers family.
Alot of speculation has arose in this event, all I can say is this. We may never know what actually happened to this diver, Past events to a dive operation shouldn't be considered unless it was a repeat event, in which case we won't really know but it does appear that from what I have read so far is they did recover the diver back onboard the same boat. Correct me if I am wrong.
I think everyone should learn from this and take it to heart that diving is a risky recreation, we knew if from the first day we signed up for the course, we know the associated risk to some of the dives. I would never put myself in a dive that I did not feel 100% ready for.
I have seen new divers with less time than myself with very little to no ability to control themselves under water, I have seen some fight with there BC from the moment we have decended to the time we surface. And they are lucky that the had a buddy to watch over them as they learn. I know my diving experience lacks compared to some of you, but I have spent most of my life in these waters from one aspect to another, the currents in the Keys can be awsome and then at times they are not, I would just like to make my thoughts known.
Again my prayers to the mans family and to those who have lost someone in a similar manner.