Given the number of people on a ship at any one time, I would imagine that statistics would log any number of assaults but most would not end in death.
Same people confined for weeks, months at a time in the same spaces.
Unfortunately, another place that fits that description is a prison.
I am one who is fascinated by statistics and chance . Math can make the past understandable and the future often predictable.
In my humble opinion ( the one that counts

)