Although is not my wish to opine on the events of that particular day, I have done the Eagle on many occasions with Key Dives and can personally attest to the following:
1. They are a very professional outfit, all their DM are instructors.
2. They are only one of a couple of shops that actually send a DM guide with each group of six divers. This is important to me and the reason I frequent Key Dives as I dive alone and do not care for insta-buddies.
3. The Eagle is an AOW dive and they are meticulous about this. They do not take students (or at least I have never seen them do) to the Eagle.
4. When they do the Eagle, they moor the boat to one of two buoys that are directly anchored to the Eagle. They always extend a granny line from the buoy to the stern of the boat, and divers are instructed to use the granny line to move from the stern to the bow (and back). They also always throw a line from the stern. Divers are instructed to hold to the line, inflate the BC and remove their fins as they approach the ladder, keeping regulators and mask in place.
5. Key Dives is not shy about canceling a dive if conditions are not appropriate or scratching the Eagle if the current is too strong.
6. The boat is equipped with DAN oxygen.
I would assume:
1. This was not a class, and that the diver had completed her AOW prior to this dive.
2. The instructor was guiding the dive, and not instructing.
3. As the husband indicated, the diver gave the OK signal and was holding to the line, therefore it was appropriate for the DM to go back to the group which at this time would have been on their way down or already waiting at the wreck for the guide.4. It would seem that there was only one DM and therefore the group was 6 or less. Therefore, on this particular outing it would seem that it was just the captain and the DM.
5. It is common safe practice that when a diver(s) drift, usually due to surfacing away from the boat or from strong currents, is to get all divers aboard before picking up the drifters.
6. It is not known from what i have read whether there was any indication of distress.
7. Whether the dive is guided or not, your buddy is still your buddy.