The Soviet Union built the worlds largest communications ship that was so powerful it could track soviet satellites and as well Americas anywhere on the planet. And since the ship was mobile it could travel the oceans and reveal and pretty much spy and
Afraid of the Americans getting there hands on it. After the fall of the USSR the vessels and its components were scrapped. I might say a great shame.
https://www.youtube.com/watch?v=YEkCSrZVg30
China has copied the same concept