Finding MH370's black box the key, say Chinese scientists

China should put aside doubts and act quickly to recover flight MH370's black box, Chinese scientists say.

Answers to vital questions such as why the plane veered off course from Kuala Lumpur to Beijing on March 8 and out over the southern Indian Ocean, would probably be found in the plane's rugged recording devices, but China needed more information to find them, scientists said.

They said information released by Malaysian authorities had been vague or incomplete, impeding the search.

Professor Fu Xiongjun, an image and signal processing researcher with the Beijing Institute of Technology, said he had doubts about the Malaysian government's search capabilities and hence its announcement. But the conclusion by Western experts that the flight came to a tragic end 2,500 kilometres southwest of Perth had to be accepted.

"Malaysia's claim must be verified, but we can also use the data to run our own estimate on the possible crash site and locate the plane," Fu said.

Yin Junjun, a research fellow on radar signal interpretation with Tsinghua University in Beijing, said that to find the Boeing 777, investigators would need data from at least three satellites to fix its last co-ordinates.