The Indonesian authorities found one of the black boxes on a Sriwijaya Air plane that crashed into the Java Sea over the weekend.
The recorder was shipped to Jakarta port, Navy spokesman Fajar Tri Rohadi told Reuters.
Local television footage had previously shown a white plastic box holding the device on a speedboat.
It was not immediately clear whether the aircraft’s flight recorder or the cockpit voice recorder had been restored.
As soon as the flight data and cockpit dictation machines are restored, the Indonesian National Transportation Safety Committee (KNKT) has announced that it will be able to read the information in three days.
Transport Minister Budi Karya Sumadi and other officials were due to hold a press conference later Tuesday.
The Boeing 737-500 aircraft with 62 people on board crashed into the Java Sea on Saturday, four minutes after taking off from Jakarta’s main airport.
More human remains were found at the crash site the previous Tuesday, as well as personal items such as wallets with IDs.
The plane was on a domestic flight to Pontianak on Borneo Island, about 740 km from Jakarta, before disappearing from radar screens.
It was the second major plane crash in Indonesia since the deaths of 189 passengers and crew in 2018 when a Lion Air Boeing 737 MAX also crashed into the Java Sea shortly after taking off from Jakarta.
The jet that crashed on Saturday has a completely different design.
With few immediate clues as to what led to a catastrophic loss of control after launch, investigators will rely heavily on the flight recorders to determine what went wrong.
Sriwijaya Air’s aircraft was nearly 27 years old and much older than Boeing’s problematic 737 MAX model.
Older 737 models are widespread and do not have the stall prevention system implicated in the MAX security crisis.
With little prospect of finding survivors, authorities said yesterday that the focus would be on recovering the bodies of victims.
A police hospital that received the remains had taken 40 DNA samples from relatives of victims and other medical records to aid identification.
A child’s Marvel backpack was seen in the footage as one of the nagging items the search team found while searching the rubble.