Scrutiny about the wreck's cause, meanwhile, has turned to what the ferry was carrying: more than 3,600 tons of cargo, according to the company that loaded it.
An inspector that examined the vessel during a redesign said it could safely handle only about 1,000 tons of cargo and passengers, and needed more than 2,000 tons of water as ballast to ensure it remained balanced.
"The ship would suddenly fall even with just a small turn. It should not make a sharp turn," said Lee Kyu Yeul, professor emeritus in ship and offshore plant design at Seoul National University's Department of Naval Architecture and Ocean Engineering. "It should make a huge circle with 1 or 2 degrees of turn, but (the Sewol) made a small circle. So it fell."
Prosecutors have raided and seized documents at Korean Register of Shipping, which conducted the redesign inspection, and the Korea Shipping Association, which regulates and oversees departures and arrivals of domestic passenger ships, according to officials at both organisations who asked to be anonymous because they were not authorized to speak about matters under investigation.
