When people are on the plane, when the plane is about to enter the runway and ready to begin taxiing before take-off, the flight attendants on the plane will tell the passengers that the plane will take off immediately by broadcasting on the plane, reminding everyone to turn off their mobile phones and computers. It is forbidden to use mobile phones and computers with wireless network cards during flight. When the plane is about to land, the flight attendants will ask everyone to dim the lights they use. When the plane takes off and land, the flight attendants need to open the visor, close the small board, and straighten the seat back. At the same time, the flight attendants in the cabin will also check one by one to ensure that each passenger will make every request. Why do flight attendants ask passengers to do this?
When the aircraft is flying, it is forbidden to use mobile phones and computers with wireless network cards because they emit and receive electromagnetic waves during their use. Electromagnetic waves can interfere with the normal operation of the navigation equipment and the operating system on the aircraft, which may cause danger and even cause the aircraft to crash. According to statistics, in recent years, more than 20 flight accidents caused by electromagnetic interference have occurred worldwide. In fact, when the plane is flying normally in the air, you can look at the e-book and use the computer to read or type offline.
Before the plane takes off and land, the visor is opened to facilitate the rescue of the aircraft outside the aircraft when the aircraft is in an accident, and it is also convenient for the personnel in the cabin to understand the situation outside the cabin. The small board table and the straight seat back are used to ensure a large distance between the front and rear seats, so that the aircraft can keep the emergency passage unblocked in the event of an accident, so that passengers can escape.
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