- Pressure increases for plane tracking after Malaysia Airlines MH370Chinese ship hunting for missing Malaysia Airlines Flight MH370 detects 'ping'China ship hears 'signal'; unclear if Malaysia Airlines MH370 relatedMalaysia Airlines MH370: Chinese ship detects pulse signal in Indian Ocean
Three separate but fleeting sounds from deep in the Indian Ocean offered new hope Sunday in the hunt for the missing Malaysian airliner, and officials rushed to confirm or rule out they were signals from the plane's black boxes before their beacons fall silent.
The head of the multinational search being conducted off Australia's west coast confirmed that a Chinese ship had picked up electronic pulsing signals twice in a small patch of the search zone, once on Friday and again on Saturday.
On Sunday, an Australian ship carrying sophisticated deep-sea sound equipment picked up a third signal in in a different part of the massive search area.
“This is an important and encouraging lead, but one which I urge you to treat carefully,'' retired Australian Air Chief Marshall Angus Houston, who is coordinating the search, told reporters in Perth.
He stressed the signals had not been verified as linked to Malaysia Airlines Flight 370, which was travelling from Kuala Lumpur to Beijing when it disappeared on March 8 with 239 people on board.
“We have an acoustic event. The job now is to determine the significance of that event. It does not confirm or deny the presence of the aircraft locator on the bottom of the ocean,'' Houston said, referring to each of the three transmissions.
China's official Xinhua News Agency reported late Saturday that the patrol vessel Haixun 01 on Friday detected a ``pulse signal'' at 37.5 kilohertz (cycles per second) _ the same frequency emitted by flight data recorders aboard the missing plane _ in the southern Indian Ocean.
Houston confirmed the report, and said that the Haixun 01 detected a signal again on Saturday within 2 kilometers (1.4 miles) of the original signal, for 90 seconds. He said that China also reported seeing white objects floating in the sea in the area.
Houston said the British navy's HMS Echo, which is fitted with sophisticated sound locating equipment, was moving immediately to the area where the signals were picked up, and would be there in the next day or two.
The Australian navy's Ocean Shield, which is carrying high-tech sound detectors from the US Navy, will also head there, but would first investigate the sound it picked up in its current region, about 300 nautical miles (555 kilometers) away, he said.
He said Australian air force assets were also being deployed on Sunday into the Haixun 01's area to try to confirm or discount the signals relevance