The hologram's came about because US Citz were going to the Caribean/Mexico paying for a class & getting the certification, they'd then come back to the US walk into their local DS for more continuing ED and they didn't know/do any of the work required for the previous class, and would have to learn what they should already have known.
There is/was a case were a lady and her son took a Deep Specialty class then the mom got hurt three or four months later, ascending to fast and not doing a safety stop from 125ft, claimed she'd never been told of anything like slow ascents and safety stops, she never had bought the AOW or the DEEP Specialty books, and sued the resort(hilton, i believe) and the dive operation and won some big money.
This is why PADI requires students to have their own book, etc... ITs not the agency, its the individual dive Shops and Instructors that make a difference, good or bad.
There is/was a case were a lady and her son took a Deep Specialty class then the mom got hurt three or four months later, ascending to fast and not doing a safety stop from 125ft, claimed she'd never been told of anything like slow ascents and safety stops, she never had bought the AOW or the DEEP Specialty books, and sued the resort(hilton, i believe) and the dive operation and won some big money.
This is why PADI requires students to have their own book, etc... ITs not the agency, its the individual dive Shops and Instructors that make a difference, good or bad.