SEARCH crews have detected a new signal thought to be from missing Malaysia Airlines flight370 from the depths of the Indian Ocean.
Former Defence chief Angus Houston, heading the Joint Agency Coordination Centre in Perth, confirmed an aircraft has detected a fifth signal in the vicinity of Australian defence vessel Ocean Shield, during the search for the missing Malaysia Airlines plane.
The signal was detected by a RAAF P-3 Orion plane in the search zone, and is potentially from a man-made source.
The command centre handling the hunt for the missing Malaysia Airlines plane is analysing a freshly detected underwater sound that could have come from a man-made source, possibly the jet's black box.
Searching ... Gunner Richard Brown on the lookout from the HMAS Perth, in the search for missing Malaysia Airlines flight MH370. Picture: AFP/AUSTRALIAN DEFENCE/ABIS NICOLAS GONZALEZ Source: AFP
Retired air chief marshal Angus Houston, who co-ordinates the joint agency search from Perth, says the hunt has yielded a potential new lead after an RAAF Orion aircraft detected a signal in the vicinity of the vessel Ocean Shield.
"The acoustic data will require further analysis overnight, but shows potential of being from a man-made source," the former defence force chief said in a statement on Thursday evening.
The RAAF has been dropping buoys carrying microphones from planes near where the earlier sounds were heard.
Royal Australian Navy Commodore Peter Leavy said each buoy was dangling a hydrophone listening device about 300 metres below the surface.
Fifth signal ... Angus Houston said the new signal will require further analysis to confirm it is from a man-made source. Picture: AP Source: AP
Search crews believe they're homing in on the crash site in the deep southern Indian Ocean after sounds consistent with a plane's black box were detected earlier this week.
The latest development comes after Ocean Shield failed to detect underwater signals after positive transmissions thought to be from Malaysia Airlines Flight MH370 were received on Saturday and Tuesday.
"They continued the pinger operations through the night," Mr Houston said.
"They haven't picked up anything. I don't know how much longer they'll go for because the likelihood on Day 34 is that the batteries must be getting near their use-by date."
Meanwhile, British Royal Navy survey ship HMS Echo is arriving in the area help the Ocean Shield.
Grief ... A woman ties a message card for passengers onboard the missing Malaysia Airlines Flight 370 at a shopping mall near Kuala Lumpur. Picture: AP Source: AP
The hydrographic survey ship, whose specialist equipment can scan the seabed and has been specially adapted to listen for the sonar pings, was diverted from her patrol in the Indian Ocean after a request from the Malaysian authorities for support.
Searchers have not yet decided to send down the US Navy's Bluefin 21, an autonomous underwater vehicle that is able to travel deep underwater.
The two transmissions that were received on Tuesday were markedly weaker than the two sustained transmissions heard on Saturday.
Both sets of transmissions have been determined to be consistent with man-made frequencies coming from airplane black boxes.
Malaysia's acting Transport Minister Hishammuddin Hussein said he remains "cautiously optimistic" after the latest ping.
New pings ... Sub Lieutenant Ryan Penrose watches HMAS Success as HMAS Perth approaches for a replenishment at sea while searching for missing Malaysia Airlines flight MH370. Picture: AFP/AUSTRALIAN DEFENCE/ABIS NICOLAS GONZALEZ Source: AFP
Mr Houston has said he believes MH370 will be found "in the not-too-distant future"
"Hopefully in a matter of days, we will be able to find something on the bottom that might confirm that this is the last resting place of MH370," he said.
Mr Hussein told the BBC he was confident search teams were getting closer to discovering the wreckage.
"I know there will be answers. I know we will find the plane. It is just a matter of when," he said.
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