Australian PM says signals detected come from Malaysian jet black boxes

Australian PM says signals detected come from Malaysian jet black boxes

PanARMENIAN.Net - Australian Prime Minister Tony Abbott says authorities are confident that signals heard in the Indian Ocean are coming from the "black box" flight recorders of the missing Malaysia Airlines plane.

Speaking in China, he said teams had "very much narrowed" the search area.

An Australian vessel has on four occasions picked up signals consistent with flight recorders, officials say.

But a fifth signal picked up by a plane on Thursday, April 10, is now thought unlikely to be linked to flight MH370.

The Malaysian plane vanished on March 8, with 239 people on board. It was flying from Kuala Lumpur to Beijing when it lost contact with air traffic controllers.

Based on satellite data, officials believe it crashed into the southern Indian Ocean, far from its intended flight path.

An Australian vessel, the Ocean Shield, has been using a U.S. Navy towed pinger locator to listen out. Signals were detected twice over the weekend and twice on Tuesday.

Speaking in China during an official visit, Abbott said search teams needed as much information as possible from the acoustic signals before the black-box batteries ran out.

"It's [the search area] been very much narrowed down because we've now had a series of detections, some for quite a long period of time,'' Abbott said. "Nevertheless, we're getting to the stage where the signal from what we are very confident is the black box is starting to fade."

On Thursday an Australian aircraft picked up an audio signal in the same area as the four previous detections.

But the Australian Joint Acoustic Analysis Centre had analyzed the data and confirmed that the signal was "unlikely to be related to the aircraft black boxes", said Air Chief Marshal Angus Houston, who heads the agency overseeing the search.

He said that there had been "no major breakthrough in the search for MH370".

ACM Houston has cautioned that search work using the towed pinger locator will continue until officials are sure that the black-box batteries - which last about a month - have run out.

At that point the Bluefin 21 submersible drone will be sent down to search for wreckage on the sea floor, but this could be a laborious and pain-staking task made more difficult by the presence of silt.

On Friday, up to 15 aircraft and 13 ships were involved in the search, which was targeting a reduced area of 46,713 square kilometers.

As the Ocean Shield continues to listen for acoustic signals, ships and aircraft are combing another area for possible debris from the plane, based on analysis of ocean drift.

"Yesterday there were no sightings reported by search aircraft or objects recovered by ships," the coordinating agency said in a statement on Friday morning.

Investigators still do not know why MH370 strayed so far off course, after disappearing over the South China Sea between Malaysia and Vietnam.

The backgrounds of both passengers and crew have been scrutinized as officials consider hijacking, sabotage, pilot action or mechanical failure as possible causes.

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