JAKARTA, Jan. 9 -- Signals from the black boxes of an AirAsia jetliner, which crashed in the Java Sea off Indonesia's Central Kalimantan coast, have been detected, Military Commander General Moeldoko said on Friday.

"The location was estimated 300 meters from the initial point," Moeldoko was quoted as saying by the detik.com news website, referring to a location where the tail of Airbus A320-200 was found on Wednesday.

Moeldoko was onboard navy ship Banda Aceh used as a baseship to supervise the operation to lift up the tail, which he said was submerged in the seabed mud.

Seven divers were deployed to check the signals and confirm the position of the black boxes, Moeldoko added.

Flight QZ8501 went down on Dec. 28 en route from Indonesia's second largest city of Surabaya to Singapore with 162 people aboard. So far, 47 bodies have been recovered in a multinational search operation.