That is horrible that someone passed, my condolenses to his family. I was at mikes last weekend and one of the other students in my OW class told me that someone got hurt, but i hate to hear that it was due to poor viz and improper training, My OW class everyone in the class had a buddy, and your job is to keep track of your buddy on a group dive and we never were further than 10 feet from the instructor, the most people that we had in a group was 6 to 1 that was with 15 - 20 ft of viz, than after that it was always you and your buddy with an instructor while they are testing you. and there was always a DM on the dock watching if someone ascended. I felt very safe during the whole class. i had a great time and am going to continue to pursue qualifications.