"We will continue attaching the chains to the ship during the night, and by tomorrow, we should be ready for the next stage of the salvage operation," Franco Porcellacchia, the chief engineer of the project, told journalists on the Tuscan island of Giglio.
"We will then begin lowering the sponsons into position," he said, referring to the huge tanks used to float the vessel by pumping in pressured air to expel the water inside.
The Concordia, which crashed into rocks off Giglio in 2012, killing 32 people, should be ready to be towed to a port in Genoa in northern Italy by Monday at the latest, Porcellacchia said.
Salvage Master Nick Sloane told journalists crowding the portside that the week-long venture to raise and remove the ship was "going smoothly".
Also Read
Ship owner Costa Crociere told journalists it could not confirm reports that one of the robot submarines known as Remote Operated Vehicles (ROVs) controlling the positioning of the cables underwater had been damaged during the operation.
Once the sponsons have been lowered into place, the liner will be floated another 10 metres or so, with each deck controlled for structural damage as it emerges.
Final checks will then be carried out before the Concordia is dragged off on its final Mediterranean journey to be scrapped in Genoa.