These sorts of ships are famous for having stability problems. We can't rule out anything at this stage.

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It's a roll-on, roll-off ferry, and there is a big question mark over the stability of this kind of ship.

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It only takes a small amount of water to get onboard, and it sets up a sort of uncontrollable rocking effect that actually turns the vessel over quite quickly. They can sink in no time flat.

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