Costa Concordia a "labyrinth" for divers

Italian scuba divers swim around the wreck of the Costa Concordia
In this undated photo released by Carabinieri (Italian paramilitary police) on Jan. 20, 2012, Carabinieri scuba divers swim close to the Costa Concordia cruise ship, off the tiny Giglio island, Italy.

The bodies of the missing Costa Concordia cruise ship passengers are thought to be in an area now deep underwater, a dangerous place for search divers to be at the best of times - never mind if the ships moves.

One diver described it as "a labyrinth," and said it was a miracle anyone survived.

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Meanwhile, even more evidence is emerging that the ship's captain knew something was wrong long before he told the passengers, or took emergency measures.

Amateur video surfaced Friday that shows a crew member telling passengers to go back to their cabins, that "everything is under control," just half an hour before the ship capsized.

Watch Pizzey's full report above.