I'm no naval architect, but wouldn't the ship break in two once the robot tries to pick it up? It would for sure break apart due to centrifugal force while being swung.

I like movies where I can suspend belief (monsters and giant robots), but I hate it when they get the regular real stuff wrong.

You mean those tiny helicopters that can each lift thousands of tons of super robot mass, right ? And they can do that while flying in perfect formation! ;-)