His ships sinking and his men drowning.
The meaning of the title Cold Equations is directed towards people who don't get along very well and have different points of views. Take a magnet for example: Some poles attract, others repel. Be confident! I believe in you! You've got this! Hope this helps!
Answer:
"Bruno, trying to change the subject, asks Shmuel if he has any sisters. ... There is an tragic irony in Shmuel's statement that he wants to work with animals in a zoo, because he and the other prisoners are currently being treated like animals—lower than animals, even, as they are killed with impunity."
This is what I found online.
I have never read this book before so...