China is building immense antenna

hong-kong - China has built an antenna five times the size of the city of New York. It took thirteen years to build the antenna, which can emit extremely low-frequency radio waves.

Officially, the device is intended for civilian purposes, among other things to measure earthquakes. But the Chinese defense can also use the antenna, reports the Hong Kong Chinese newspaper South China Morning Post. Submarines can pick up the radio waves hundreds of meters below the surface of the water, making it no longer necessary to get above water.