Costa Concordia Salvage Operation Under Way

By Tom Kington, in Giglio

Salvage officials have begun the mammoth task of righting the crippled Costa Concordia as jacks hoist it off rocks near the Tuscany coast.

The daring operation was delayed by about three hours due to bad weather, and began at 9am local time (8am).

"All checks have been carried out and the operation has begun," said Fabrizio Curcio, the deputy Civil Protection chief.

The rescue effort, which is expected to last about 12 hours, will see the giant ship gradually rotated and rolled upright.

Five hundred engineers and divers are working on the salvage

The officials have warned the stranded vessel will bend and suffer enormous internal damage during the €600m (£503m) operation, known as "parbuckling".

But they are confident the ship's hull will remain intact as 56 massive chains tighten around it, avoiding the nightmare scenario of the 114,000-ton vessel shattering and spilling its contents into the waters around the Italian island of Giglio.

Sergio Girotto, project manager for Micoperi - the Italian firm that has teamed up with US company Titan to raise the Concordia - said: "The ship will probably bend during the operation and metal inside will buckle."

"We have 12,000 tons of pressure to use, which would lift two Eiffel Towers, but I hope we will only need five or six thousand."

The cruise liner capsized in shallow water 20 months ago after smashing into rock, causing the deaths of 32 passengers.

Two bodies are still missing, and officials hope they will now be found.

Much will depend on how firmly the ship is wedged onto two pinnacles of underwater granite where it came to rest on the night of January 13, 2012, prompting the evacuation of 4,200 passengers and crew.

Experts have said there is little danger of pollution

The two outcrops, which are embedded six metres into the hull of the ship, are the great unknown at the heart of the operation, which will see the ship hoisted by jacks on to a bed of 1,000 cement bags and six underwater platforms bigger than a football pitch.

Franco Gabrielli, who has supervised the Italian government's role in the operation, told reporters ahead of the salvage attempt that the operation had a 100% chance of success.

The ship is due to be hauled 65 degrees back to upright position.

Within the first hour or two, the ship should be wrenched free from the two granite outcrops it is impaled on, said Franco Porcellacchia, an engineer working on the salvage for ship owner Costa Cruises.

Four to five hours will then be needed to pull the ship upwards before gravity takes over, and its final descent into an upright position, also taking four to five hours, is controlled by adjusting the buoyancy of the massive metal tanks attached to its sides.

A 12-man team will control the pulleys and tanks from a barge close to the wreck.

How the ship will look if it is successfully righted

Marine biologist Giandomenico Ardizzone, who has been monitoring the sea bed for the ship's operator Costa Crociere, said he had dived under the vessel on Saturday to fix cameras on the points where the rocks plunge into the hull.

"We have been told to get ready for loud noises during the lifting," said Mr Ardizzone.

He added that 29,000 tons of water will pour out of the ship as it is pulled upright, an even greater amount, 43,000 tons, will enter the ship.

"That means less of the ship will be visible out of the water after the parbuckling," he said.

What does come out will be polluted water that has swilled inside the ship for months in a mix of residual fuels, heavy metals and rotten food, including more than three tons of melon, 500 litres of olive oil, 14,000 packets of cigarettes, 18,000 bottles of wine, eight tons of beef and over 11 tons of fish.

Mr Ardizzone said the quantities of heavy metals and fuels were too small to create concern for the surrounding protected marine park, a view shared by Maria Sargentini, the head of a public commission set up to monitor the operation.

:: Live Coverage on Sky News

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