Why turn off the plane or turn on the flight mode? Why did you turn off the plane?

1. Why should I set the flight mode for my mobile phone on the plane? 2. Why do you want to fly? That's why I'm flying 3. Why do you want to fly or turn it off? 4. Why should I turn my cell phone on or off when flying? Why should the mobile phone set the flight mode on the plane? As we all know, you must set your mobile phone to flight mode when you get on the plane. Why do you want to turn off or turn on the flight mode on the plane? But many people don't know why they should turn on the flight mode before boarding the plane. Because turning on the flight mode can make the plane have a good flight state and there will be no accidents.

First, why do you want to fly mode?

Flight mode is to turn off telephone communication, and information statistics cannot be answered. When making a phone call or sending a message, there is no signal contact with the base station, and no attempt will be made to contact the base station. Because cell phone signals will interfere with the electronic equipment on the plane, it is not allowed to turn on the cell phone on the plane. Moreover, in this mode, turning off the mobile phone signal has related functions, and the mobile phone can continue to use its function of turning off the mobile phone or turning on the flight mode, and can continue to read novels and movies. So it's called flight mode, and it can also save a lot of electricity for mobile phones in flight mode. Very convenient. So when flying, you must turn on the flight mode to ensure the safety of yourself and others.

Two. The role of flight mode

Why should we turn off the plane or turn on the flight mode to ensure the safety of the plane? Radio waves emitted by mobile phones may interfere with the local communication system. Aircraft need to fly in flight mode to ensure flight safety. Cell phone signals will have a certain impact on some equipment on the plane, so be sure to turn off your cell phone before boarding to avoid unnecessary injuries. The plane is in flight mode. Can make. The plane is safer to fly. Will ensure that people land safely. The mobile phone must be turned on or off before boarding the plane, because it is afraid of affecting the communication system of the plane and is responsible for the safety of passengers and the plane.

Three. Benefits of flight mode

Starting the flight mode on the plane will not interfere with the electronic equipment of the plane, will not affect the operation of the plane, and can reach the destination safely. Moreover, the flight mode is also very energy-saving, which is much more energy-saving than when the flight mode is not available. Because after turning off the flight mode, it can bring stability to the flight of the aircraft.

Why do you want to fly in airplane mode? The reason for flying in airplane mode is 1, because cell phone signals will interfere with electronic equipment on the plane. The flight mode of the mobile phone is to turn off the communication module of the mobile phone, so that the mobile phone can't answer the phone and send short messages, and there is no signal contact with the base station. At this time, calculator, stopwatch, clock and other functions can be used. This is a state of "anti-interference" and the original meaning of "flight mode", which means that the mobile phone will not be disturbed like flying, but it does not mean that the mobile phone will not interfere with the take-off and landing of the plane.

2. The flight mode of mobile phone is also called aviation mode, which means that when flying, the mobile phone must be turned off or turned on, and all communication signals must be cut off to prevent the transmission and reception of mobile phone signals from affecting the flight of the aircraft. Some mobile phones have this function, which can turn off the signal transmission and reception of SIM card. The flight mode function in some mobile phones can be realized by some software, such as the aviation mode in the system tools in S60 software. This mode can turn off the function of the SIM card, so that the mobile phone is in a state of not sending and receiving signals, and does not affect the operation of other functions of the mobile phone (generally, the mobile phone cannot operate without the SIM card).

Why do you want to turn on the flight mode or turn off the flight mode on the plane? I often hear people say, "If you don't turn off your phone when flying abroad now, you can turn it on at any time. No stewardess on the plane will ask you to turn off your cell phone. Only China now requires civil aviation to turn off their mobile phones for fear of accidents. It can be seen from here that China's aircraft technology is not as good as that of foreign companies. " In fact, I can tell you clearly that this is another way of saying that the moon in foreign countries is brighter than that in China. It is just hearsay and has no basis. In fact, in most foreign countries (Europe and America), flight attendants will also ask you to turn off your mobile phone. This is no different from the situation in China.

It is understood that the ban on the use of mobile phones on airplanes was implemented by the FCC (Federal Communications Commission of the United States) at 199 1 on the grounds that radio waves emitted by mobile phones may interfere with ground-to-air communication. This regulation is widely accepted by the public, but there are a lot of disputes in the civil aviation industry. Boeing Company of the United States, as well as the Discovery Channel and other departments, have done a lot of experiments through various means. But until now, they have not found any evidence to prove that mobile phones can have any noticeable influence on ground-to-air communication. But at the same time, they can't prove that there is no impact. Therefore, despite repeated vacillations by the FCC, the original proposal was maintained. Therefore, the United States has to regulate the behavior of passengers using mobile phones on the plane in accordance with this regulation.

So is there a wireless telecommunication conflict in China?

China's aviation signals use the frequency band of 1 18MHz, while domestic GSM mobile phones use the frequency band of about 900MHz, and the frequency of WiFi signals is higher. They are so different that they can't interfere with each other theoretically. "But in fact, mobile phones use frequency hopping pulses to transmit signals, so there will be many secondary radio waves with different frequencies. Although these secondary radio waves are very weak, the sensitivity of airborne communication equipment is very high. " In the case of uncertain whether there is obvious harm, in line with the principle of safety first, turning off the mobile phone is the best choice.

For the above reasons, Decree No.2004 of the Civil Aviation Administration of China. 195 "Rules for Examination and Approval of Operating Qualification of Air Transport Carriers of Large Aircraft", in which Article 12 1.573 on prohibiting and restricting the carrying of portable electronic equipment stipulates that passengers on the aircraft are not allowed to open and use the doors from the moment when the aircraft closes the doors for starting the flight to the moment when the doors are opened for ending the flight. Mobile phones rank first among these disabled devices.

In addition, some airlines are not allowed to fly even if passengers take the plane mode. They only accept the mode that the mobile phone is turned off. Why is this? The flight mode is the wishful thinking of the manufacturer, and the effect is not stable, so it has not been recognized by the aviation department until now.

Imagine a plane carrying hundreds of lives. Safety is no small matter, in line with the principle of being responsible for yourself and them, you must turn off your mobile phone or switch to flight mode before the plane takes off. This is the duty and responsibility of every passenger.

Why should I turn my cell phone on or off when flying? During the whole flight, the aircraft uses airborne radio navigation equipment to keep in touch with the ground navigation station in real time and control the flight route. In the case of low visibility, it is necessary to use the instrument landing system to land, that is, to use the blind landing platform on the runway to send electromagnetic signals to the aircraft to determine the runway position.

Mobile phones not only send out electromagnetic signals when making or answering calls, but also keep in touch with ground base stations in standby state. In the process of its search, although the time of signal transmission is very short, it has strong continuity. Therefore, the electromagnetic waves emitted by mobile phones will interfere with the navigation system of aircraft. _

The ban on the use of mobile phones on airplanes began at 199 1, which was stipulated by the Federal Communications Commission (FCC).

Now basically, airlines will not force their mobile phones to turn off, but generally ask them to turn on the flight mode. Flight mode will cut off all communication signals of the mobile phone, so as to prevent the sending and receiving of mobile phone signals from affecting the flight of the aircraft.