According to the off - duty captain of Sewol , the ship owners ignored his warning that the ship should not carry so much cargo because she would not be stable .
Lee Sang - yun also proposed overloading as a cause .
According to the off - duty captain of Sewol , the ship owners ignored Lee Sang - yun 's warning that the ship should not carry so much cargo because she would not be stable .
Lee Sang - yun also proposed overloading as a cause .