Most people had radios.
Ships communicate using radios. To be able to use a radio the captain has to have a special cob radio license.
They use radios built in their space suits.
especially radios so they could communicate to each other
If the Motorola were actually a CB radio, it would be able to - the brand name doesn't matter, they all transmit on the same frequencies. However, Motorola does not manufacture any radios which transmit on the 11 metre Citizens Band.
You can use them to communicate with other people when you need to. Example: A cellphone is a two-way radio.
Astronauts on the moon used radios to communicate with mission control and other astronauts. The distance to Earth was too great for them to communicate in real time without radios. Additionally, the space suits and helmets they wore made it difficult to communicate verbally with each other.
Radios and land lines; US warships still used blinking lights.
Astronauts mainly communicate in space using radio waves. They use radios to talk to mission control on Earth and to communicate with each other inside the spacecraft. They can also use video conferencing and email for communication purposes.
All you can do is use hand and body signals - if someone is near enough to see you.
Fighter pilots don't use sound to communicate, they use radios, and radio waves travel far faster than any plane to date, so there is no trouble communicating.
Fireside chats were direct communication between the president Franklin D. Roosevelt and the citizens of US. This direct communication played him into the favor of citizens.
If radios are broken, astronauts can use backup communication systems, such as hardwired intercoms or visual signals, to communicate with each other. They might also use written messages or gestures to convey critical information. In emergencies, they could rely on pre-established protocols and signals to ensure safety and coordination. Additionally, they could attempt to repair the communication equipment if feasible.