In general, specialists in this field are required to obtain information using satellites and other devices and inform the pilot so that there is no problem with flight safety. The person who takes on this responsibility must prepare a map of the flight path before the flight and determine at what altitude and speed the plane needs to travel. If there are rain clouds, these people will change the flight path and suggest a new route. In other words, this person is the second pilot. It should be noted that not all airplanes have pilots, but the existence of a navigator increases the quality of the flight.