VOA慢速英语--主要航空公司因 5G 争议取消并更改飞往美国的航班

Airlines Cancel, Change Flights to US over 5G Dispute

Several airlines canceled flights to the United States or changed planes they were using because of concerns about the new 5G service in the country.

The airlines said they were warned that the widely used Boeing 777 aircraft was especially at risk of radio interference by the new high-speed wireless² service.

FlightRadar24 is a service that provides information about aircraft and flights around the world. It reported that the Boeing 777 was the second-most used wide-body plane on flights to and from the U.S. last year with around 210,000 flights.

Emirates is the largest user of the Boeing 777 plane for long-distance flights. The carrier said Wednesday that it would suspend several flights to the U.S. because of "concerns associated with the planned deployment³ of 5G mobile network services in the U.S." It said it would continue flights to Los Angeles, New York, and Washington.

Other carriers, including Singapore Airlines, Air India, Korean Air Lines, Japan Airlines, and Germany's Lufthansa, said they will change to other planes on flights to the U.S.

The airlines said they made the changes after being informed that 5G signals "may interfere¹ with the radio altimeter installed on the Boeing 777."

But Air France said it planned to continue flying its Boeing 777s into American airports. It did not say why it made its decision. Qatar Airways⁴, Israel's El Al, and Abu Dhabi's Etihad Airways also said their services had not been affected⁵.

5G service in the U.S.

The cancellations and changes came as AT&T and Verizon started 5G service in the U.S. on Wednesday. The phone companies have delayed the start of the high-speed networks two times since early December.

They also agreed to delay and limit 5G service near some U.S. airports after 10 American airline companies asked to stop the deployment of 5G service near some airports.

The 5G network runs on a radio spectrum⁶ known as the C band which airline companies say could interfere with the operation of some altimeters. An altimeter sends radio waves from an airplane to the ground to measure how far above the ground an airplane is traveling. Pilots use it to help with landing planes, especially during bad weather.

Similar 5G networks have been deployed⁷ in Europe and South Korea with no reports of interference. In France, 5G network providers reduce the power of 5G transmitters to avoid interference.

What's the issue in the U.S.?

In the U.S., there are two different agencies with different responsibilities for airline safety and communication.

The Federal Aviation Administration (FAA) oversees⁸ airline safety while the Federal Communication Commission (FCC) supervises communications by radio, television, satellite, cable, and wire.

The FCC has established that the C band used by 5G networks will not affect the radio spectrum used by airlines. And AT&T and Verizon have said their equipment will not interfere with aircraft electronics.

The FCC's chairwoman said in a statement that the 5G "deployment can safely co-exist with aviation technologies in the United States, just as it does in other countries around the world."

The FAA has already cleared several aircraft to fly into airports with 5G signals, but the Boeing 777 is not on the list. The agency has said it will permit planes with modern, dependable altimeters to operate around high-power 5G. But planes with older altimeters will not be permitted to make landings under low-visibility conditions.

But the FAA said signal strength and the transmitting direction of 5G towers could be the problem. The FAA said in December, "Base stations in rural areas of the United States are permitted to emit at higher levels in comparison to other countries which may affect radio altimeter equipment...."

Boeing said it was working with all parties on a "data-driven solution for the long-term that ensures all commercial airplane models can safely operate as 5G is deployed."

Words in This Story

install - v. to make a device ready to be used in a certain place

spectrum - n. a range of radio waves

low-visibility - adj. a condition with limited ability to see clearly

transmit - v. to send in the form of electrical signal to radio, television, etc...

commercial - adj. used in the buying and selling of goods and services

1 interfere   

v.(in)干涉，干预；(with)妨碍，打扰

参考例句：

• If we interfere, it may do more harm than good.如果我们干预的话，可能弊多利少。
• When others interfere in the affair,it always makes troubles. 别人一卷入这一事件，棘手的事情就来了。

2 wireless   

adj.无线的；n.无线电

参考例句：

• There are a lot of wireless links in a radio.收音机里有许多无线电线路。
• Wireless messages tell us that the ship was sinking.无线电报告知我们那艘船正在下沉。

3 deployment   

n. 部署,展开

参考例句：

• He has inquired out the deployment of the enemy troops. 他已查出敌军的兵力部署情况。
• Quality function deployment (QFD) is a widely used customer-driven quality, design and manufacturing management tool. 质量功能展开(quality function deployment,QFD)是一个广泛应用的顾客需求驱动的设计、制造和质量管理工具。

4 AIRWAYS   

航空公司

参考例句：

• The giant jets that increasingly dominate the world's airways. 越来越称雄于世界航线的巨型喷气机。
• At one point the company bought from Nippon Airways a 727 jet. 有一次公司从日本航空公司买了一架727型喷气机。

5 affected   

adj.不自然的，假装的

参考例句：

• She showed an affected interest in our subject.她假装对我们的课题感到兴趣。
• His manners are affected.他的态度不自然。

6 spectrum   

n.谱，光谱，频谱；范围，幅度，系列

参考例句：

• This is a kind of atomic spectrum.这是一种原子光谱。
• We have known much of the constitution of the solar spectrum.关于太阳光谱的构成，我们已了解不少。

7 deployed   

（尤指军事行动）使展开( deploy的过去式和过去分词 )； 施展； 部署； 有效地利用

参考例句：

• Tanks have been deployed all along the front line. 沿整个前线已部署了坦克。
• The artillery was deployed to bear on the fort. 火炮是对着那个碉堡部署的。

8 oversees   

v.监督，监视( oversee的第三人称单数 )

参考例句：

• She oversees both the research and the manufacturing departments. 她既监督研究部门又监督生产部门。 来自《简明英汉词典》
• The Department of Education oversees the federal programs dealing with education. 教育部监管处理教育的联邦程序。 来自互联网