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南京文德雅思:雅思阅读机经真题解析-Flight from reality

时间:2018-07-25 17:10来源:南京文德教育 作者:南京文德教育 点击:
Flightfrom reality Mobilesare barred, but passengers can lap away on their laptops to their hearts’content. Is one really safer than the other? In t

Mobilesare barred, but passengers can lap away on their laptops to their hearts’content. Is one really safer than the other? In the US, a Congressionalsubcommittee grilled airline representatives and regulators about the issuelast month. But the committee heard that using cellphones in planes may indeedpose a risk albeit a slight one. This would seem to vindicate the treatment ofManchester oil worker Neil Whitehouse, who was sentenced last summer to a yearin jail by a British court for refusing to turn off his mobile phone on aflight home from Madrid. Although he was only typing a message to be sent on landingnot actually making a call, the court decided that hems putting the flight atrisk.

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But despite running a number of studies,  Boeing, Airbus and various government agencies haven't been able to find  clear evidence of problems caused by personal electronic devices, including  mobile phones. "We've done our own studies. We've found cellphones  actually have no impact on the navigation system," says Maryanne  Greczyn, a spokeswoman for Airbus Industries of North America in Herndon,  Virginia, Not do they affect other critical systems, she says The only impact  Airbus found? "Sometimes when a passenger is starting or finishing a  phone call, the pilot hears a wry slight beep in the headset," she says.

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Many planes still use equipment certified  to the older standards, says Dan Hawkes, head of avionics at the CAA's Safely  Regulation Croup. The CAA study doesn't prove the equipment will actually  fail when subjected to the signals, but docs show there's a danger.  "We've taken some of the uncertainty out of these beliefs," he says  Another study later this year will see if the cellphone signals actually  cause devices to fail.

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In 1996, RTCA, a consultant hired by the  Federal Aviation Administration in the US to conduct tests, determined that potential  problems from personal electronic devices were "low". Nevertheless,  it recommended a ban on their use during "critical" periods of  flight, such as take-off and landing. RTCA didn't actually test cellphones,  but nevertheless recommended their wholesale ban on flights, But if  "better safe than sorry" is the current policy, it's applied  inconsistently, according to Marshall Cross, the chairman of Mega Wave  Corporation, based in Boylston, Massachusetts. Why are cellphones outlawed  when no one considers a ban on laptops? "It's  like most things in life. The reason is a little bit technical, a little bit  economic and a little bit political,” says Cross.

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