In 2013, the US Airline decided to allow passengers to use electronic devices on their flights, including take-off and landing times, ending 50 years later, followed by many international airlines, while many airlines continued to block the use of electronic devices during their flights , Why should we close the devices? Why was it allowed to be used later?As soon as the aircraft prepares to take off, passengers will be sent a voice message that asks them to close their electronic devices. According to regulatory procedures that are uniform around the world, the use of mobile devices is not allowed at altitudes of less than 3,000 meters, including the "flight mode" But above all, the use of devices such as laptops and music players is allowed, while phones must remain closed. These measures are designed to avoid potential interference between the signals of these devices and sensitive electronic systems on the aircraft, but do these concerns have scientific grounds ?It is known that airplanes use hundreds of electronics-based systems known as avionics, which are used for navigation, communication with the Earth and tracking of the components they maintain in the atmosphere. Some of these electronics involve sensors that transmit information to the cockpit. From the fact that smart phones and even other electronic devices such as iPods, tablets, laptops and mobile games all broadcast radio waves, and if the frequencies transmitted by these devices close to the frequencies of the systems, "Avionics" signals and readings may be wrong. Systems such as radar, communications and collision prevention technology increase the risk more if these devices are damaged and start to transmit radio waves stronger than they should, or if they come together signals from several devices.
The cockpit includes radar, sensors and collision prevention devices that are likely to affect radio waves for passenger devices (Getty Images)
This is in theory, but in practice there are no recorded aircraft accidents that confirm that such interference has caused them. However, the causes of some incidents can sometimes remain unknown, since the flight recorder can not distinguish whether A major defect in one system occurred as a result of electromagnetic interference from passenger devices.What has changed now?But with these risks in place, the US Aviation Administration approved in 2013 the use of mobile phones and other electronic devices in aircraft during the take-off and landing operations as long as the aircraft is well protected from electronic interference and the airline has obtained approval from them, "During use.In addition, some airlines are already allowing passengers to use the phone for in-flight communications, such as Virgin Atlantic and Delta Airline. Their aircraft include special systems such as On Air and Aeromobile, The plane is called "picocles" allowing the devices to transmit signals at low levels. The broadcast is processed and re-broadcast to a satellite and then routed to terrestrial networks, which allows mobile phones to be used as "international roaming" when a person uses his phone in a foreign country, except That in that country do not need to use a satellite connection. Systems such as "AeroMobile" allows you to use your phone to communicate at high altitudes by air but not during the take-off or landing, while USA allows the operation of phones in all stages of flight, "Air", which can not make phone calls. However, many airlines prefer to take precautions and prevent passengers from operating the devices during the landing takeoff because it is still difficult to prove that there is no interference.
Despite the lack of proven operation of electronic devices during the take-off and landing operations, most airlines still prohibit this (Getty Images)
New US restrictionsAs of Tuesday, March 21, 2017, the United States has decided to ban passengers from eight countries in the Middle East from taking their larger personal electronic devices (such as tablets, laptops, cameras and electronic games) with them while flying but can be placed in shipping bags , These countries are Egypt, Jordan, Morocco, Qatar, Saudi Arabia, Kuwait, UAE and Turkey.The new US decision was taken for security reasons and possibly for a possible threat from al-Qaeda in the Arabian Peninsula, the Yemeni branch of al-Qaeda, CNN quoted an American official as saying. .
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