Indonesian navy divers searching the ocean floor on Tuesday recovered the flight data recorder from a Sriwijaya Air jet that crashed into the Java Sea with 62 people on board.
The device is expected to help investigators determine what caused the Boeing 737-500 plane to nosedive into the ocean in heavy rain shortly after taking off from Jakarta on Saturday.
Divers were seen on an inflatable vessel with a large white container containing the device heading to a Jakarta port.
The devices were buried in seabed mud under tons of sharp objects in the plane's wreckage, a navy top official said.
At least 160 divers were deployed Tuesday in the search.
More than 3,600 rescue personnel, 13 helicopters, 54 large ships and 20 small boats are searching the area just north of Jakarta where Flight 182 crashed and have found parts of the plane and human remains in the water at a depth of 23 meters (75 feet).
So far, the searchers have sent 74 body bags containing human remains to police identification experts who on Monday said they had identified their first victim, 29-year-old flight attendant Okky Bisma.