MOKPO, South Korea — An immediate evacuation order was not issued for the ferry that sank off SouthKorea’s southern coast, likely with scores of people trapped inside, because officers on the bridge were trying to stabilize the vessel after it started to list amid confusion and chaos, a crew member said Thursday.

The first instructions from the captain were for the passengers to put on life jackets and stay put, and it was not until about 30 minutes later that he ordered an evacuation, Oh Yong-seok, a 58-year-old crew member, told The Associated Press. But Oh said he wasn’t sure if the captain’s order, given to crew members, was actually relayed to passengers on the public address system.

Several survivors also told the AP that they never heard any evacuation order.

The loss of that precious time may have deprived many passengers of the opportunity to escape as The Sewol sank on Wednesday, not too far from the southern city of Mokpo.

Nine people, including five students and two teachers, were confirmed dead, but the toll was expected to jump amid fears that the missing 287 passengers — many high school students — were dead. The confirmed fatalities include a female crew member in her 20s, five high school students and two teachers. Coast guard officials put the number of survivors Thursday at 179.

The increasingly anxious search for the missing was hampered Thursday by strong currents, rain and bad visibility.

There were 475 people aboard, including 325 students on a school trip to the tourist island of Jeju in the south of the country. The ferry had traveled overnight from Incheon on the northwestern coast of South Korea, and was three hours short of its destination when the ship began to list. The cause is not yet known.

The Sewol now sits — with just part of its keel visible — in waters off Mokpo, about 470 kilometers (290 miles) from Seoul.