New evidence shows the sunken South Korean ferry did not make a sharp turn shortly before the disaster, but changed course much more gradually.

Full data from the Sewol's automatic identification system, an on-board transponder used for tracking, showed the ship in fact made a J-shaped turn before listing heavily and sinking last week, leaving more than 300 people dead or missing.

A ministry of ocean and fisheries official said on Friday that the vessel had taken a sharp turn, but another official has said the AIS data had been incomplete and the true path of the ship became clear when the information was fully restored.

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The cause of the disaster is not yet known. The third mate, who has been arrested, was steering at the time of the accident, in a challenging area where she had not steered before, and the captain said he was not on the bridge at the time.

Authorities have not named her, though a colleague identified her as Park Han-gyeol.

Meanwhile, more than 100 bodies have been retrieved from the wreckage of the ferry.

Dozens of police formed a cordon around the dock on Jindo Island as the latest bodies arrived. The death toll has shot up since the weekend when divers found a way to enter the submerged ferry. Officials said today the fatalities had reached 104.

The ferry sank with 476 people on board, many of them pupils from a single high school.

Families who once dreamed of miraculous rescues now simply hope their loved ones' remains are recovered soon, before the ocean does much more damage.