I always wonder with ships like that and these huge container ships how they keep the center of gravity below the water line. Otherwise in a moderate to heavy sea it slips. In Alaska a new crab boat was lost with all hands for violating that principle. They would need a large amount of ballast on the keel even if the superstructure was aluminum. butlerweave, do you know how they accomplish the center of gravity issue.
No your question would require a Marine Engineer. There was a top heavy Japanese Battleship before or during WWII that rolled over.
If the sea wants the ship, the sea will take it. Really large ships don’t spend all that many years in service nowadays.
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