National Geographic: Man-Made S02 E49 World's Largest Cruise Ship

The Oasis of the Sea is the largest and most revolutionary cruise ship in the world. Apart from sheer size - with 18 decks, 2,700 staterooms and the ability to carry 5,400 guests - the ship is a high-tech vessel for the 21st century, presenting features that have never been seen on a ship before. To build it, designers and engineers are put to the ultimate test.