Today they are going to raise the Costa Concordia that sank off Giglio Island, Italy, after hitting rocks when passing close for the captain to show off in January, 2012.
Telegraph (UK) has detailed sketches of how they are doing it. Needless to say, their process is very elaborate, since the ship is 950 long and is 114,000 tonnes - twice the size of Titanic.
More after the first day's effort. Daily Mail (UK).