Depending on the design and bulk heads ripping a hole in the hull can be an option. My father was a naval architect and did some work re-floating container ships and I know they did this on at least one occasion and got the ship up the west coast of Africa, past Spain and Portugal, and through the English Channel. They would have stopped earlier but the ship yards en route jacked up their prices because they assumed there was no other choice.

The interesting thing for me is going to be where that ship goes if they manage to re-float it.