The Sub was tooooooooooooo big
I've seen Below yesterday, was a fun movie to watch, but had some flaws in it.
The grabling hooks??? Like a medium sized destroyer would thow out hooks to dammage a submarine?? Yeah right and getting caught in something else or being pulled down by the submarine itself...
But the funniest thing, the submarine was like a castle, it was so big, the crew had so much space, complete cantine build in....even modern submarines are smal and cramp. In the movie/series "Das Boot" they really make you feel claustrofobic being in a sub, but in Below they really missed that.