Malaysia Airlines Flight 370 satellite communications
The analysis of communications between Malaysia Airlines Flight 370 and Inmarsat's satellite telecommunication network provide the primary source of information about Flight 370's location and possible in-flight events after it disappeared from military radar coverage at 02:22 Malaysia Standard Time (MYT) on 8 March 2014, one hour after communication with air traffic control ended and the aircraft departed from its planned flight path while over the South China Sea.
Source: Wikipedia
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