A transcript of a ship-to-shore radio exchange and interviews by The Associated Press showed the captain delayed the evacuation for half an hour after a South Korean transportation official told the ship it might have to evacuate.
The recommendation by the unidentified official at the Jeju Vessel Traffic Services Center came at 9 a.m., just five minutes after a distress call by the Sewol. In the exchange, the Sewol crewmember says: "Currently the body of the ship has listed to the left. The containers have listed as well."
The Jeju VTS officer responds: "OK. Any loss of human life or injuries?" The ship's answer is: "It's impossible to check right now. The body of the ship has tilted, and it's impossible to move."
The VTS officer then says: "Yes, OK. Please wear life jackets and prepare as the people might have to abandon ship."
"It's hard for people to move," replies the crew member on the radio.
Oh Yong-seok, a helmsman on the ferry, told the AP that the first instructions from the captain were for passengers to put on life jackets and stay where they were as the crew tried to control the ship.
About 30 minutes later, the captain finally gave the order to evacuate, Oh said, adding that he wasn't sure if, in the confusion and chaos on the bridge, the order was relayed to the passengers. Several survivors told the AP that they never heard any evacuation order.
Lee, the captain, made a brief, videotaped appearance with his face hidden by a gray hoodie. "I am really sorry and deeply ashamed," Lee said. "I don't know what to say."
On Friday, strong currents and rain made rescue attempts difficult. Divers worked in shifts to try to get into the sunken vessel, where most of the missing passengers are thought to be trapped, coast guard spokesman Kim Jae-in said.
Three vessels with cranes arrived at the site to prepare to salvage the ferry. But they will not hoist the ship before getting approval from family members of those believed trapped inside because the lifting could endanger any survivors, said a coast guard officer, speaking on condition of anonymity, citing department rules.
Chonghaejin Marine Co. Ltd, in Incheon, the operator of the ferry, added more cabin rooms to three floors after its 2012 purchase of the ship, which was built in Japan in 1994, an official at the private Korean Register of Shipping told the AP.
The official, who spoke on condition of anonymity because the matter was still under investigation, said the extension work between October 2012 and February 2013 increased the Sewol's weight by 187 tons and added enough room for 117 more people. The Sewol had a capacity of 921 when it sank.
As is common in South Korea, the ship's owner paid for a safety check by the Korean Register of Shipping, which found that the Sewol passed all safety tests, including whether it could stabilize in the event of tilting, the official said.
Prosecutors raided and seized materials and documents from the ship's operator, as well as six companies that had conducted safety checks, revamped the ship, or loaded container boxes, a sign that investigators will likely examine the ship's addition of rooms and how containers were loaded.
The last major ferry disaster in South Korea was in 1993, when 292 people were killed.
Klug reported from Seoul. Associated Press writers Hyung-jin Kim and Jung-yoon Choi in Seoul contributed to this report.
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