The third indication is that that after the transponder was turned off and civilian radar lost track of the plane, Malaysian military radar was able to continue to track the plane as it turned west.
The plane was then tracked along a known flight route across the peninsula until it was several hundred miles offshore and beyond the range of military radar. Airliners normally fly from waypoint to waypoint where they can be seen by air traffic controllers who space them out so they don’t collide. These lanes in the sky aren’t straight lines. In order to follow that course, someone had to be guiding the plane, Goglia said.
Goglia said he is very skeptical of reports the plane was flying erratically while it was being tracked by military radar, including steep ascents to very high altitudes and then sudden, rapid descents. Without a transponder signal, the ability to track planes isn’t reliable at very high altitudes or with sudden shifts in altitude, he said.
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