Map shows 634 runways in range of missing Malaysia Airlines plane

The infographic shows where the plane could be if it had successfully touched at a secret location — one of the many theories floating round as the mystery enters a second week.

Boeing 777s need a runway to be at least 1524 metres long, limiting the number of possible sites.

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Officials searching for the plane are certain Flight MH370 was deliberately flown off course for an extended period of time. What happened to it then remains still unknown.

InfoGraphic Here