Rick,
Good job, my compliments to you on your decisive action.
I remember when we went down there, wasn't that the same place we went on a similar profile to the dive you were doing on this dive? The video, the grim reaper sign, the waiver, all make it clear that a standard open water diver should NOT go past that point. When we took the dive I remember you discussing the fact that we would go no deeper than the sign even though you as a full cave instructor could take me beyond. That was our plan and we dove our plan.
I also remember when we were at Blue Grotto and you demonstrated how easily one can create a silt out, and how completely screwed up it makes visibility, and we both had HID lights, with backups.
On both of our dives we were the only ones in the water at the time and we had plenty of air (both on doubles) so it was an appropriate teaching tool to show me what some of the dangerous situations look like. A silt out is not somthing to be taken lightly, nor is being narcd at depth, nor in a cave without a line. Yikes, as I type this I get more concerned for the safety of the other team you saved.
Again Rick, good work.
Mark Vlahos