With the development of the times and technology, human life is more and more convenient, go out without a wallet, not afraid of getting lost, etc., all thanks to mobile phones, and even most people's work and entertainment are on mobile phones, which can be regarded as machines. However, sometimes the use of mobile phones is not allowed, such as before the flight will be broadcast or flight attendants prompt passengers to turn off the mobile phone, many people wonder why the mobile phone can not be used when the aircraft is flying.
As we all know, the crew of the aircraft needs to make real-time calls with the tower, which is in order to obtain information related to extreme weather, whether there are obstacles in front of the aircraft to ensure the safety of flight, in addition to the existence of weather radar, mobile phones and other electronic devices on the aircraft, although the impact of a mobile phone is not large, but if it is dozens, or even hundreds of mobile phones running at the same time, then it will be difficult to predict the impact.
Seeing this, some people will wonder, then why don't you use your mobile phone and adjust it to airplane mode? Because the mobile phone signal needs a base station to maintain, if the mobile phone is used on land, the base station will be closer than the aircraft flying above, the signal of the mobile phone is naturally stable, and the power used will be relatively small. If it is on an airplane, the mobile phone will establish a signal with different base stations, which will require a lot of power to find in the process, and the power of the mobile phone will be consumed quickly.
In addition, the ground base station has to carry out a large amount of calculation data, which is to optimize the connection with the mobile phone, because it is limited by the technology at that time, if there are many mobile phones that do not open the flight mode, the load caused to the base station will be very heavy.
According to statistics, the probability of survival in an air crash is less than 25%, although we do not seem to have heard of aircraft accidents that occur because of mobile phones, but no one dares to joke about life, so the aircraft has no rules that do not allow the use of mobile phones, and has lasted for more than 20 years. However, with the advancement of technology, in 2013, the United States took the lead in lifting this regulation, but it must be used in flight mode, and China is also close behind, on the aircraft, not only can use electronic products, but also slowly provide wifi, convenient for passengers to use.
In addition to the progress of technology, there is also that the mobile phone signal and the ground base station distance does not have much impact, can even be said to be completely absent, and before there will be many people feel that the use of mobile phones is not allowed because of the fear of interfering with the aircraft communication signal, in fact, their communication bands are almost rarely crossed, so the interference caused will not be very large, will not affect the safety of flight.