There is "no plan B" for the Costa Concordia - engineers believe they have considered all the risks and worked to reduce them.
Underwater robots will allow real-time live images of the Costa Concordia wreckage to be shown in the control room so the team can be sure the job is being done correctly.
It will be late afternoon before the engineers know whether or not the parbuckling of the Costa Concordia is a success.
There will be three main phases to remove the wreckage of the Costa Concordia cruise liner:
- Detaching the wreckage from the reef - expected to take one to two hours
- Shortening the cables used by engineers - five hours
- Rotating the vessel - 12 hours
The process will be monitored from the control room using robots and video and no one will be on the ship, Civil Protection Agency spokeswoman Francesca Maffini said.
The parbuckling of Costa Concordia will start at 6am tomorrow morning, officials have said.
All the necessary checks have been done for the rotation of the vessel and the weather conditions are right.
The engineers are confident the attempt will go well.
Italian authorities have given the final go-ahead for a daring attempt to pull upright the crippled Costa Concordia cruise liner from its side in the waters off Tuscany.
The ship capsized 20 months ago, and Italy's national Civil Protection Agency have waited until sea and weather conditions were forecast for dawn tomorrow before making the final decision.
Never before have engineers tried to right such a huge ship so close to land.