AirAsia victim with life jacket raises questions about plane's last moments

Indonesian Search and Rescue crews unload one of two bodies of AirAsia passengers recovered from the sea at the airport in Pangkalan Bun, central Kalimantan December 31, 2014. [Photo/Agencies]

Authorities in Surabaya were making preparations to receive and identify bodies, including arranging 130 ambulances to take victims to a police hospital and collecting DNA from relatives.

"We are praying it is the plane so the evacuation can be done quickly," Hernanto said.

Most of the people on board were Indonesians. No survivors have been found.

Officials said waves two to three metres (six to nine feet) high and winds were hampering the hunt for wreckage and preventing divers from searching the crash zone.

"The fact that the debris appears fairly contained suggests the aircraft broke up when it hit the water, rather than in the air," said Neil Hansford, a former pilot and chairman of consultancy firm Strategic Aviation Solutions.

Indonesian President Joko Widodo said his priority was retrieving the bodies.

Widodo, speaking in Surabaya on Tuesday after grim images of the scene in the Java Sea were broadcast on television, said AirAsia would pay an immediate advance of money to relatives, many of whom collapsed in grief when they saw the television pictures from the search.

AirAsia Chief Executive Tony Fernandes has described the crash as his "worst nightmare".

About 30 ships and 21 aircraft from Indonesia, Australia, Malaysia, Singapore, South Korea and the United States have been involved in the search.

Singapore said it was sending two underwater beacon detectors to try to pick up pings from the black boxes, which contain cockpit voice and flight data recorders.