Indonesia is stepping up efforts to find the black boxes of a passenger plane, which crashed into the Java Sea on Saturday.
Some 50 divers have joined the search operation off the north coast of Jakarta.
They have found aircraft parts and human remains.
The first victim has been identified.
Authorities were able to locate two black boxes on Monday, but the search is not easy.
"There is a lot of silt on the bottom of the sea area where the plane crashed, so the visibility is relatively poor, only about three-four meters. The black box is still being searched"
The flight recorder will be critical in analyzing the cause of the crash.
The crashed plane a Boeing 737-500 disappeared from radar just four minutes after it took off from Jakarta.
62 people were on board all Indonesians.
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