It is very sad.....

Anymore detail what happens under the water??? The other buddy wanted to rescue his partner but both died finally???                                                                                                                                                                                                                                                                                                                       

Thks.

But we should dive the deepest in the very 1st dive, say the 1st morning dive in day 1. And in the last day (day 3), the dive should be shallower than the deepest dive. If it said it was 40M in their last day dive, I doubted it. 40M is the max for the recreation diver.

Also, when going back to water surface, the DM should count the number of divers, and the DM should know there were missing 2 divers.

I think maybe the 2 divers faced strong current and got loss of the other divers.                                                                                                                                                                                                                                                                                                                       

The reasons maybe:

1) Strong current (downward current ?)
2) Divers did not check their oxygen level and other equipments and sunk immediately (very common if guided by a Philippines DM)
3) The DM did not count the number of divers before returning to water surface
4) Improperly dived to the deepest level  in the last dive, that may cause dizzy becoz absorbing too much resident nitrogen

But feeling very sad.....