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Do not the portable electron equipment such as aboard use mobile telephone
From;  Author:Stand originally

In recent years, as portable electron equipment especially of the mobile telephone gain ground increasingly, in civil aviation implement on the phenomenon of use mobile telephone and other electron equipment also is added with each passing day much, already constituted menace to flight safety. A large number of evidence show aboard uses the portable electron equipment such as the mobile telephone to be able to generate electromagnetism interference, cause system of plane navigational aid, autopilot to be out of order to endanger aviation security badly then. Especially aerostat radio navigation and communication system are taking off, climb, into mix nearly land level, because aerostat is in low height, any electromagnetism interference are caused likely machine the consequence that destroys a person to die. This problem already caused the wide attention of social all circles.
1991, england a Boeing of some airline 767 - 300 model after the plane is taking off from Bangkok before long, a computer on machine was started suddenly choose unit instead, cause aircraft accident, on machine 233 people die entirely. It is notebook computer, portable that findings makes clear photographed collection machine or mobile telephone to cause this serious aviation accident accident directly, because create the computer on machine,the utmost of abrupt out of control is the plane got serious electron is disturbed. Brazilian aviation accident was mixed 1996 1998 the aviation accident accident of Taiwan also with useMobile phoneAbout.

In addition, although did not cause serious accident,also have a few cases but the brim that had been close to an accident. On July 11, 1999, when some airliner prepares to be in airport of Guangzhou white cloud to descend, appeared to make an appointment with phenomenon of 8 degrees flight path deviate, after pilot discovers this one circumstance, inform steward checks cabin instantly, as a result discovery has 4, 5 passengers are using a mobile telephone. In steward before going up, give after checking, the plane just resumed normal flight path before land. On January 8, 2000, after some airliner is taking off from Zhan Jiang airport before long, the directive that pilot discovers plane compass suddenly and aircraft line existence are serious deviation, all of computer science department shows plane crab 10 sea mile. Pilot informs steward undertakes checking instantly, discovery has a passenger to using a mobile telephone. On Feburary 13, 2000, some airliner takes near course in Zhengzhou airport in, because the passenger is used on machineMobile phone, cause navigation signal abnormal, cannot land normally, aircrew gives the ability after checking is able to land. Affection of afore-mentioned a few danger if not flight crew is seasoned, processing is proper, consequence is unimaginable.

So how can the portable electron equipment such as the mobile telephone violate navigation system?

The equipment that can produce electromagnetism to disturb to navigation system includes to be mixed actively the signal with active blame launchs device, what have distinct effect among them is active signal emissive equipment, be like a mobile telephone. According to international convention regulation, channel of active navigation system is 1200 megahertz, 110 megahertz, 75 megahertz respectively, other generator must not use these channel. But, if Gsm system is system of 800 megahertz, Cdma,eye reach changes the channel of the phone is 900 - system of 1000 megahertz, Pcs is 1800 megahertz, very as adjacent as navigation system. Once mobile telephone frequency produces a change, very as dangerous like frequency of equipment of the electron on machine.
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