One industry expert on the Costa Concordia project said that this video is the most accurate and description and video of how the wreck of the Costa Concordia will be removed and floated away.
An impressive system of support platforms will first be used to roll the ship onto and into an upright position. Then, giant metal boxes called “caissons”, will be filled with air to provide buoyancy and help float the ship away. Essentially these sponses, which can be up to 11 stories tall, serve as a shell of a ship around the wreck.
Here’s the full video, well worth the watch!