There could have been negligence.
Did the hatch and vent pipe fail because of improper maintainence?
I don’t know if it did, but if so, that would be negligence.
If a particular crew member was negligent, then why wasn’t it noticed by superiors, why didn’t they inspect and test more regularly and thoroughly, why wasn’t the crew trained properly, why didn’t they address a lack of discipline or thoroughness that had crept in, why did they hire the wrong guy, etc....
When something goes wrong on a ship, there is NO avoiding accountability. If the captain didn’t know, then he should have.
Covered in the video. If you are this curiousu, just watch the damned video. I listened while working, thought it was worthwhile and posted it for history buffs. It’s worth your time, but I’ve given all of my time that I’m going to.