(CNN, April 11, 2014) — The painstaking search for Malaysia Airlines Flight 370 got a vote of confidence Friday that the effort is headed in the right direction, but officials noted that much work remains.
“We have very much narrowed down the search area, and we are very confident that the signals that we are detecting are from the black box,” Australian Prime Minister Tony Abbott told reporters during an official visit to China, where he met with President Xi Jinping.
Abbott was referring to the plane’s flight data recorder and the cockpit voice recorder. Locator beacons attached to them are designed to emit high-pitched signals, or pings.
Over the past week, four such pings have been detected by a ping locator towed by the Australian vessel Ocean Shield.
“We are confident that we know the position of the black box flight recorder to within some kilometers, but confidence in the approximate position of the black box is not the same as recovering wreckage from almost 4½ kilometers beneath the sea or finally determining all that happened on that flight,” he said.
A fifth ping, detected Thursday by a sonobuoy dropped by an airplane, is “unlikely to be related to the aircraft black boxes,” Australian chief search coordinator Angus Houston said Friday.