In March 2014 , Malaysia Airlines Flight 370 disappeared with 239 passengers and crew en route from Kuala Lumpur to Beijing . After turning away from its planned path and disappearing from radar coverage , the aircraft 's satellite data unit remained in contact with Inmarsat 's ground station in Perth via the IOR satellite ( Indian Ocean Region , 64 ° East ) . The aircraft used Inmarsat 's '' Classic Aero '' service , which does not provide explicit information about the aircraft 's location . Analysis of these communications by Inmarsat and independently by other agencies determined that the aircraft flew into the southern Indian Ocean and was used to guide the search for the aircraft
Malaysia Airlines Flight 370
Malaysia Airlines Flight 370
Inmarsat