Costa salvage effort complete

The Costa Concordia salvage operation has been completed, the head of Italy's civil protection authority announced. It took engineers 19 hours to raise the ship from its side.

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How the parbuckling process to right the Costa works

The process to right the Costa Concordia is known as parbuckling, a technical term for rotating a sunken vessel back into an upright position.

The operation involves engineers using jacks and steel pulleys to rotate the ship by 65 degrees.

Engineers use jacks and steels pulleys to rotate the ship by 65 degrees.

Hollow metal boxes, which have been welded to the side of the ship, will be filled with water to help bring the Costa Concordia upright.

Once it is upright, engineers hope to attach an equal number of tanks filled with water on the other side to balance the ship.

Hollow metal boxes, which have been welded to the side of the ship, will be filled with water to help bring the Costa Concordia upright.

The ship will eventually rest on a false seabed around 30 metres underwater, made out of a platform and cement-filled sandbags

The ship will eventually rest on a false seabed around 30 metres underwater.

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