Haryo Satmiko, deputy director of the National Road Safety Committee, told CNN in a text message that the investigators were discovered, but that investigators needed more "technical effort" to find the exact location of the so-called "black boxes".
Small amounts of debris and remains of some people aboard the plane were taken out of the water off Jakarta, but the bulk of the plane has been missing since it disappeared from the radar on Monday around 6:30 am local time.
Flight data wanted
Ir. Suryanto, head of the National Road Safety Committee, said Tuesday the Indonesian TV station TVOne that the "pings" were discovered no further than three kilometers from the group of eight current search points.
On Wednesday, Hadi Tjahjanto, Commander of the Indonesian Armed Forces, told the same broadcaster that search ships would focus on a particular point that they believe the pings might come up with.
The search and rescue operations stretched to at least 400 square kilometers on Tuesday, with divers working to get passenger remains and debris out of the water.
Indonesian President Joko Widodo worked with search teams in Tanjung Priok Port search teams on Tuesday to sort out debris and record it as part of the cause of the crash investigation. So far, no significant parts of the wreck have been retrieved.
Images of items fished out of the sea showed purses, bags, and other personal items, including a Hello Kitty children's handbag.
Speaking at a press conference on Tuesday, Muhammad Syaugi of Indonesia's National Search and Rescue Agency said the identification process is proceeding as quickly as possible, but it is unlikely that the remains of all passengers would be found.
Boeing team on site
The Lion Air aircraft was a brand new Boeing 737 MAX 8 aircraft.
Lion Air acquired the jet in August and flew only 800 hours according to the National Road Safety Committee (NTSC) in Indonesia.
A team of Boeing investigators arrived in Indonesia on Wednesday at the request of the local regulator in Indonesia, Boeing spokesman Kevin Yoo told CNN.
The plane is one of the company's newest and most advanced jets, one of 11 such aircraft in the Lion Air fleet. In a statement, Boeing said the company was "deeply distressed" by the loss and the passengers and crew on board as well whose families offered "deeply felt sympathies".
The Indonesian Aviation Authority ordered the inspection of 12 more Boeing 737 MAX 8 aircraft belonging to the country's commercial airlines.
The cause of the crash remains a mystery
Flight 610 carried 181 passengers as well as six flight attendants and two pilots from Jakarta to Pangkal Pinang on the Indonesian island of Bangka.
About 19 kilometers (12 miles) after take-off, she called for air traffic control to return to the airport, but gave no indication of an emergency.
The radar data shows that the plane was not reversed and air traffic controllers lost contact shortly thereafter, said Yohanes Sirait, spokesman for AirNav Indonesia, the air traffic control agency, to CNN.
David Soucie, a former United States Federal Aviation Administration security inspector, said the fact that an emergency was not declared should cause concern.
"What I find most peculiar is the fact that they did not declare an emergency, they just said," We're going back, "said Soucie, a security analyst at CNN.
"But if I look at the track of the plane, the plane makes a very steep jump, which is not typical of what they would have done," he added. "They would have maintained the altitude and made that turn and would have come back to the airport."
The aircraft had reported problems the night before on a Denpasar-Jakarta flight, but the engineers had reviewed and repaired the problem and granted clearance for the aircraft, Lion Air's Chief Operating Officer Edward Sirait told the local media.
AirNav Indonesia said the flight had a priority landing site if it declared an emergency.