The Costa Concordia cruise liner began its final voyage on Wednesday as it was slowly towed away from the tiny Italian island where it capsized more than two years ago, killing 32 people.

Boat sirens wailed and bells tolled on the island just before two tugboats pulled the Concordia away from Giglio's port, where the luxury liner ended up on its side in pristine Mediterranean waters after being gashed by a reef when its captain steered too close to the island.

The tugs are bringing the crippled ship on a four-day journey to the northwestern port of Genoa, which is home to the ship's owner, Costa Crociere Spa. The vessel will be scrapped there.

Accompanying the tugs and the Concordia, moving at 2 knots (3.7 kilometers per hour), were several boats to monitor any pollution that might be discharged into the waters, which are home to dolphins. Nets were attached to sides of the liner in case any remnants - dishware, pots, pans, bed linen, chairs and other furnishings - tumble out of the ship during towing.

A daring engineering operation set the Concordia upright last September. Then, over the last few months, custom-built air tanks - serving as giant water wings to aid flotation - were attached to the liner's flanks. The salvage master of the entire operation, Nick Sloane, said he felt a bit nervous before boarding a special command center attached to the top of the Concordia to monitor the final voyage. An Italian naval admiral was also on board.

Flying from the Concordia was the Italian flag, since regulations require the banner to be visible on the Italian-registered ship until it is scrapped.

On Friday, on the seabed where the Concordia had been marooned, a new search will begin for the one body that was never found. For weeks after the crash, divers combed accessible areas in vain for the body of an Indian man who served on the ship as a waiter. It's possible the Concordia itself might hold the body, but "we will only know the moment the ship is dismantled in Genoa", Franco Gabrielli, the Italian government official monitoring the entire removal process, told reporters on the island.

The Concordia's Italian captain is on trial, accused of multiple manslaughter and of causing the wreck on Jan 13, 2012, and of abandoning the badly listing ship while hundreds of the 4,200 passengers and crew were still aboard. The captain, Francesco Schettino, who is the sole defendant in the trial in Tuscany, claimed the reef wasn't on the liner's nautical charts.

"It's a moment for sobriety and sorrowful respect for those who are no more," Gabrielli, the government official, told Sky TG24 as he recalled those who perished.

France also sent a boat to monitor the voyage, since the Concordia's final route passes Corsica's east coast.

The cruise liner Costa Concordia starts to move anticlockwise during refloat operation maneuvers at Giglio Island on Wednesday. The cruise liner struck rocks and capsized two years ago, killing 32 people. Alessandro Bianchi / Reuters