为什么乘坐飞机时手神秘调成航行模式？真实缘故原由是……
坐飞机时会被要求将手机关机或调成航行模式 ，由于在飞机上使用手时机对航行爆发滋扰 ，尤其是腾飞和下降的时间 ，那么这种滋扰详细指的是什么呢?来看看这篇干货吧 。
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We all know the routine by heart: “Please your seats are in the upright position, tray tables stowed, window shades are up, laptops are stored in the overhead bins and electronic devices are set to mode.”
这句通例提醒我们都烂熟于心：“请确保您的座椅靠背笔直 ，餐桌和遮光板收起 ，条记本电脑放在头顶的行李架上 ，手机调成航行模式 。”
Now, the first four are reasonable, right? Window shades need to be up so we can see if there’s an emergency, such as fire. Tray tables need to be stowed and seats upright so we can get out of the row quickly. Laptops can become projectiles in an emergency, as the seat back pockets are not enough to them.
前几个要求都很合理 ，不是吗?遮光板收起 ，我们才华望见起火等紧迫状态 。餐桌收起 ，座椅笔直 ，我们才华迅速脱离座位 。在爆发紧迫情形时条记本电脑会酿成乱飞的抛射物 ，由于椅背的袋子不敷牢靠 。
And mobile phones need to be set to flight mode so they can’t an for the airplane, right? Well, it depends whom you ask.
尚有 ，手机需要调成航行模式 ，这样才不会引发飞机紧迫事故 ，对吗?这得看你问谁了 。
Aviation navigation and communication relies on radio services, which has been coordinated to minimize interference since the 1920s.
由于飞机导航和通讯都依赖无线电效劳 ，自上世纪20年月以来一直都是通过协调只管镌汰无线信号滋扰 。
The digital currently in use is much more advanced than some of the older analog technologies we used even 60 years ago. has shown electronic devices can emit a signal the same frequency band as the aircraft’s communications and navigation systems, what is known as electromagnetic interference.
现在应用的数字手艺比60年前所用的一些老的模拟手艺要先进得多 。研究显示 ，小我私家电子装备会发送与飞机通讯和导航系一切一频率规模内的信号 ，从而造成所谓的电磁滋扰 。
But in 1992, the US Federal Aviation Authority and Boeing, in an study, investigated the use of electronic devices on aircraft interference and found no issues with computers or other personal electronic devices during non-critical phases of flight. (Takeoffs and landings are considered the phases.)
但在1992年 ，美国联邦航空治理局和波音公司团结开展的一项自力研究视察了使用电子装备对航行的滋扰 ，效果发明 ，在航行的非要害阶段使用电脑或其他小我私家电子装备不会滋扰航行 。(腾飞和下降被视为航行的要害阶段 。)
The US Federal Communications Commission also began to reserved frequency bandwidths for different uses – such as mobile phones and aircraft navigation and communications – so they do not interfere with one another. Governments around the globe developed the same strategies and policies to interference problems with aviation. In the EU, electronic devices have been allowed to stay on since 2014.
美国联邦通讯委员会也最先推脱手机、飞机导航和通讯等差别用途的专用频段 ，这样它们就不会相互滋扰 。全球各地的政府也接纳了同样的战略和政策 ，避免航行滋扰问题 。欧盟从2014年起最先允许在飞机上坚持电子装备开机 。
Why then, with these standards in place, has the aviation continued to ban the use of mobile phones? One of the problems lies with something you may not expect – ground interference.
既然有了这些全球标准 ，为什么航空业照旧继续榨取在飞机上使用手机呢?其中一个问题可能是你想不到的 ，那就是地面滋扰 。
Wireless networks are connected by a of towers; the networks could become overloaded if passengers flying over these ground networks are all using their phones.
无线网络通过一系列信号塔来互联 ，若是飞越地面网络的旅客全在使用手机 ，网络可能会超载 。
Of course, when it comes to mobile networks, the biggest change in recent years is the move to a new standard. 5G wireless networks – desirable for their higher speed data transfer – have caused for many within the aviation industry.
虽然 ，近年来移动网络的最大改变就是新标准的转换 。现行的5G无线网络(由于更高速的数据传输而受到接待)引发了许多航空业人士的担心 。
Radio frequency bandwidth is limited, yet we are still trying to more new devices to it. The aviation industry points out the 5G wireless network bandwidth spectrum is remarkably close to the reserved aviation bandwidth spectrum, which may cause interference with navigation systems near airports that assist with landing the aircraft.
无线频段是有限的 ，而我们仍在试图添加更多新装备 。航空业指出 ，5G无线网络频段很是靠近航空专用频段 ，这可能会对机场周围辅助飞机着陆的导航系统造成滋扰 。
Besides, It be an inconvenience for cabin crew to wait for passengers to finish their call to ask if they would like any drinks or something to eat.
除此以外 ，若是旅客在飞机上打电话 ，空服职员得等旅客打完电话才华询问他们是否需要饮料或食物 ，这也会带来未便 。
重点词汇
digital technology 数字手艺 ; 数字化手艺 ; 科技 ; 数码手艺 ; 数码科技
in use 在使用
much more 更 ; 况且
some of 中的一些 ; 其中一些 ; 其中的一些
years ago 多年前
frequency band 频带 ; 频带 ，波段
navigation systems 导航系统 ; 导览系统
what is 是什么 ; 什么是 ; 什麽
known as 被称为 ; 被以为是 ; 以…而著名
electromagnetic interference 电磁滋扰
英文泉源：美国有线电视新闻网
