Some of the passengers on board the ship described hearing a horrendous noise as the ship struck rocks at about 21:30 (20:30 GMT) on Friday.

BBC: Costa Concordia cruise ship captain 'went off course'

For four days, tugboats guided the disabled ship into the port as passengers complained about miserable conditions on board.

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About 3, 200 passengers and 1, 000 crew members were on board the ship that night.

CNN: 1 year on, survivors of Costa Concordia to mark the disaster

When there is a norovirus outbreak on a ship, cruise lines are faced with the prospect of disembarking hundreds of ill passengers, sanitizing the ship and then reloading several thousands of passengers on board.

CNN: What cruise lines don't want you to know

The ship departed New York on Saturday and there are 2, 613 passengers on board.

BBC: Cunard's Queen Mary II cruise ship hit by norovirus