A few more answers for inquiring minds. I reviewed my dive log and got certified in feb 2000 and did 20 dives that year, none the next ( can't explain that), 21 in 2002 including 5 days in Gr Cayman, 11 in 2003, 17 in 2004 when some dive plans were cancelled due to multiple storms in Florida. We were in Key LArgo for 3 days of diving the week that Charlie was brewing and had to leave the keys earlier than planned due to evacuation and of course the storm hit here and not the keys. Then the other storms and some damage to dive operators on the coast made it diffcult to plan a dive trip. 3 in 2005. We had 2 dives with no problems the day before this incident, too. I have been diving in cayman, cozumel, belize, roatan in addition to our usual in key Largo/Tavernier or West PAlm, Boynton beach area. Also variety of dive types: drift, wrecks, mostly reef dives off boats, some shore diving. My husband has been diving since 1996, dives computer, and my oldest son, 35, was certified in 2003 and comes to Florida to dive with us. Also nitrox certified. I had worked with DM the week we were in Cayman and had improveed my skills but probably rustier than I realized when we made this trip. What we are doing now is as someone else noted staying together as we descend face to face so he can see if I am getting down okay and clearing ears, etc then we stop at depth and make sure all okay and I am swimming a little ahead of him or next to him. MAybe we need to check out dive group in Orlando as we usually just make our own plans.
I am most grateful that we were diving with a small group though and not in a "crowd" I wonder if I would have been noticed if the DM was busy getting other divers into the water. This operation was first rate and safety oriented. Their DMs do regular training and rescue drills and it certainly paid off for me.