The avionics system of a boeing 747 is complicated it take a pilot that is careful and intelligent to fly it
sucessfully.its frequency is radio wave,gsm handset can intefare with it operating.
the fuel level is read by an engineer that sit by the pilot.its longitude and latitude is read by the co pilot ,the level above sea level the plane has to reach is set by the pilot .it has autopilot when the pilot need,to rest.the plane maintence crew check the plane before every take off and landing.the electrical system of the plane is another.plane need a specific capacity of fuel when flying in international flight.the pilot needs to avoid human error to avoid accidents or crash.boeing airbus are the new editions.