After 13 pages of this thread a few thoughts. Not too long ago, and this happened, few would have heard about or discussed the significance of such an event. This forum certainly raises everyone's awareness. As a diver left at sea, "just a few miles off shore", with an out going current and a setting sun I am VERY aware of the feelings this situation can cause. Anger, fear and panic are not strong enough to convey what happens when you see your boat departing over the horizon, and hours go by before rescue returns. The group of Japanese divers lost in Palau comes to mind. Dive operators are responsible for the lives of their passengers, and must be held accountable. As mentioned, there are numerous methods of counting in and out of the water, but most importantly, we divers must insist upon some method of id and diving status. We need to take responsibility for our safety, if there is a real or just a perceived safety issue. Everyone wins. Divers dive, the boat moves on full and happy and there are no tragedies.