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Australia PM: Signals may be from aircraft

Tony Abbott says Australian authorities confident they know location of missing Flight MH370's data recorders.

Last updated: 11 Apr 2014 04:40
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The 'black boxes' could help solve the mystery of why Flight 370 veered so far off course [Reuters]

Australia's prime minister says searchers hunting for the missing Malaysian Flight MH370 are confident underwater signals that have been picked up are coming from the aircraft's "black box".

Tony Abbott said while on an official visit to China on Friday that Australian authorities are confident they know the location of the recorders from the plane, which disappeared without a trace on March 8 during a flight from Kuala Lumpur, Malaysia, to Beijing.

Abbott said that he was confident that the latest signal, which was captured by a listening device buoy, indicated that the search was focused on the correct area.

"We have very much narrowed down the search area and we are very confident that the signals that we are detecting are from the black box on MH370," Abbott said in Shanghai.

"Nevertheless, we're getting to the stage where the signal from what we are very confident is the black box is starting to fade," he said.

"We are hoping to get as much information as we can before the signal finally expires."

The latest development seems to lend credence to four previous "pings" detected by a US Navy Towed Pinger Locator (TPL) towed by Australia's Ocean Shield vessel.

The mystery of Malaysia Airlines Flight MH370, which disappeared more than a month ago, has led to the most expensive search and rescue operation in aviation history.

The "black boxes" record cockpit data and may provide answers about what happened to the plane, which was carrying 227 passengers and 12 crew when it vanished on March 8 and flew thousands of kilometres off its route.

Signal fading

But the batteries in the black boxes have already reached the end of their 30-day expected life, making efforts to swiftly locate them on the murky ocean floor all the more critical, Abbott said.

"We are now getting to the stage where the signal from what we are very confident is the "black box" is starting to fade and we are hoping to get as much information as we can before the signal finally expires," he said.

Search efforts are now focused on three areas.

Aircraft and ships are combing over two large search zones, about 2,390km northwest of Perth, for possible floating debris related to the crash.

But it is the much smaller search zone, just 600sq km, located about 1,670km northwest of Perth that has generated fresh optimism.

The smaller zone is near where the Ocean Shield picked up the acoustic signals and where dozens of sonobuoys capable of transmitting data to search aircraft via radio signals were dropped on Wednesday.

But experts say the process of teasing out the signals from the cacophony of background noise in the sea is a slow and exhausting process.

An autonomous underwater vehicle named Bluefin-21 is onboard the Ocean Shield and could be deployed to look for wreckage on the sea floor once a final search area has been identified.

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