Not sure why there's so much criticism. This was a thoughtful showing of what must have been a terrifying time for all the crews in the Atlantic
It gave us nothing more than getting straight to the point kill or be killed in 24 hrs and to think the reality would have gone on for weeks .
I thought the effects were great and the realism worked well , really saw what a cold , wet and very hostile place and they were stuck in a very cramped tin tub without a break .
Because it was only about a day then the film is kept very short , especially compared to most nowadays.
Just watch and enjoy and thank it will never be like that for any of us