(Bloomberg) — The hunt for Malaysian Air Flight 370 shifted focus for the third time in as many weeks after new analysis indicated the plane could have gone down hundreds of miles from the previous search area.

The lead is based on radar and performance data as the jet flew between the South China Sea and Malacca Strait, authorities said. It shows the Boeing Co. 777 moved faster, using more fuel, and may not have crashed as far south as estimated earlier.

“This will remain a somewhat inexact science,” Martin Dolan, chief commissioner of the Australian Transport Safety Bureau, said of the planes's speed, adding that ongoing analysis “could result in further refinement of the potential flight path.” The new search zone, 1,100 kilometers (700 miles) to the northeast, assumes it traveled at close to constant velocity.

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