The Sewol-ho ferry sank off Korea's southwestern coast four years ago, in the nation's worst-ever maritime disaster.
It was raised from the sea last year, but has since been lying on its side on land in a port.
This week, it's finally going to be set upright.
That'll allow for a more thorough search for five presumed victims who have not been accounted for.
More than 300 people died when the ship went down, most of them high school students on a field trip.
The Sewol Investigation Committee had 33 steel beams installed under the vessel on Monday, and says weather conditions will allow for it to be moved on Thursday.
Securing the Sewol-ho in an upright position and removing the beams will be done by June 10th.