Report of signal raises hopes for finding plane

A Chinese ship involved in the hunt for the missing Malaysian jetliner reported hearing a “pulse signal” Saturday in southern Indian Ocean waters with the same frequency emitted by the plane’s data recorders, as Malaysia vowed not to give up the search for the aircraft.

The Australian government agency coordinating the search for the missing plane said early today that the electronic pulse signals reportedly detected by the Chinese ship are consistent with those of an aircraft black box.

But retired Air Chief Marshal Angus Houston, the head of the search coordination agency, said they “cannot verify any connection” at this stage between the electronic signals and the missing Malaysia Airlines Flight 370.

Military and civilian planes, ships with deep-sea searching equipment and a British nuclear submarine scoured a remote patch of the southern Indian Ocean off Australia’s west coast, in an increasingly urgent hunt for debris and the “black box” recorders that hold vital information about Malaysia Airlines Flight 370’s last hours.

After weeks of fruitless searching, officials face the daunting prospect that sound-emitting beacons in the flight and voice recorders will soon fall silent as their batteries die.

A Chinese ship that is part of the search effort detected a “pulse signal” in southern Indian Ocean waters, China’s official Xinhua News Agency reported. Xinhua, however, said it had not yet been determined whether the signal was related to the missing plane, citing the China Maritime Search and Rescue Center.

Xinhua said a black box detector deployed by the ship, Haixun 01, picked up a signal at 37.5 kilohertz, the same frequency emitted by flight data recorders such as the ones on Flight 370.

Earlier Saturday, Xinhua reported that a Chinese military aircraft searching for the missing aircraft spotted “white floating objects” not far from where the electronic signals were detected.

Houston said the Australian-led Joint Agency Coordination Centre heading the search operation could not yet verify the Chinese reports and had asked China for “any further information that may be relevant.” He said the Australian air force was considering deploying more aircraft to the area where the Chinese ship reportedly detected the sounds.

“I have been advised that a series of sounds have been detected by a Chinese ship in the search area. The characteristics reported are consistent with the aircraft black box,” Houston said, adding that the Australian-led agency had also received reports of the white objects sighted on the ocean surface about 56 miles from where the electronic signals were detected.

“However, there is no confirmation at this stage that the signals and the objects are related to the missing aircraft,” Houston said.

Still, Malaysia’s defense minister and acting transport minister, Hishammuddin Hussein, was hopeful. “Another night of hope — praying hard,” he tweeted in response to the latest discoveries.

There are many clicks, buzzes and other sounds in the ocean from animals, but the 37.5-kilohertz pulse was selected for underwater locator beacons on black boxes because there is nothing else in the sea that would naturally make that sound, said William Waldock, an expert on search and rescue who teaches accident investigation at Embry-Riddle Aeronautical University in Prescott, Arizona.

“They picked that (frequency) so there wouldn’t be false alarms from other things in the ocean,” he said.

Waldock cautioned that “it’s possible it could be an aberrant signal” from a nuclear submarine if there was one in the vicinity.

If the sounds can be verified, it would reduce the search area to about four square miles, Waldock said. Unmanned robot subs with sidescan sonar would then be sent into the water to try to locate the wreckage, he said.

John Goglia, a former U.S. National Transportation Safety Board member, called the report “exciting,” but cautioned that “there is an awful lot of noise in the ocean.”

“One ship, one ping doesn’t make a success story,” he said. “It will have to be explored. I guarantee you there are other resources being moved into the area to see if it can be verified.”

The Boeing 777 disappeared March 8 while en route from Kuala Lumpur, Malaysia, to Beijing with 239 people aboard. So far, no trace of the jet has been found.

Hishammuddin, the Malaysian defense minister, told reporters in Kuala Lumpur that the cost of mounting the search was immaterial compared to providing solace for the families of those on board by establishing what happened.

“I can only speak for Malaysia, and Malaysia will not stop looking for MH370,” Hishammuddin said.

He said an independent investigator would be appointed to lead a team that will try to determine what happened to Flight 370. The team will include three groups: One will look at airworthiness, including maintenance, structures and systems; another will examine operations, such as flight recorders and meteorology; and a third will consider medical and human factors.

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The investigation team will include officials and experts from several nations, including Australia — which as the nearest country to the search zone is currently heading the hunt — China, the United States, Britain and France, Hishammuddin said.

A multinational search team is trying to find debris floating in the water or faint sound signals from the data recorders that could lead them to the missing plane and unravel the mystery of its fate.

Finding floating wreckage is key to narrowing the search area, as officials can then use data on currents to backtrack to where the plane hit the water, and where the flight recorders may be.