The Man
Unbanned zombie poster
As far as I can make out, they didn't even use any kind of checklist before or during a dive.
A simple and key aspect in aviation, heck, we even use checklists for routine maintenance and test operations (Automated Material Handling Systems). They help to ensure the proper things are done in the proper order and nothing gets overlooked. Even before the checklists and the work we have pre-task planning to examine risks and hazards and how to mitigate or deal with potential issues.