More than 100 people have now been confirmed dead in the South Korean ferry disaster.
Authorities say 198 people are still missing presumed.
Emergency services say they are experiencing difficulties gaining access to the ship’s restaurant where it is believed most of the missing were trapped.
Seven crew members have so far been arrested and the country’s president has described the actions of some of the crew as “tantamount to murder.”
An undersea robot is set to get to work in an attempt to bring the hull to the surface.
Rescue teams are due to continue the search for a further two days and after agreement with the families the salvage operation will begin.
A total of 174 passengers survived the sinking.