Later,Amelia's radio signals were received by a United States Coast Guard ship near the island.

VOA: special.2010.05.26

All of the systems on the Mercury spacecraft sent radio signals to flight controllers.

VOA: special.2009.06.17

The radio signals got weaker and weaker.

VOA: special.2010.05.26

Marconi sent the first radio communication signals through the air in eighteen ninety-five.

VOA: special.2010.01.31

While TV and Radio Marti have received praised for broadcasting news to people in Cuba, where the government jams foreign signals, TV Marti continues to face internal and external criticism.

VOA: standard.2009.06.18