First, I'll respond to Andy....
There is nothing dumber than doing a blue water ascent in a ripping current unless it's part of the dive plan and the boat is watching for you. If you want to find yourself MILES from your dive boat, go right ahead and do it, but all those divers that came up on other mooring balls did it right. If your boat is tied to the ship, you'd better come up on something tied to the ship.
This is not that hard a dive, but does have unpredictable currents. If you stay close to the deck and in the lee of the current you should be able to make it back to the line you descended on. I've done 6-7 dives on her and not ever had a problem getting back to my line.
Kudos to all the boats that participated in getting everyone back to shore in one piece. Sounds like a mess and the professionals out there got it all sorted without losing anyone and no loss of life and that sounds like it was a distinct possibility at one point.
Rachel