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.
Radios and land lines; US warships still used blinking lights.
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.
The frequencies that FRS radios use is channels 8 to 14 and 462 to 467. FRS radios are Family Radio Service radios and can be bought from Radio Shack and Amazon.
Ham radios can be used to communicate across around 1000 miles or more. However these are strictly regulated and you can get into serious trouble if you use them improperly. For handheld radios the best quality is from a GMRS radio, which you often see plumbers and electricians employ as worktools. These also require licenses to operate within specific areas.
Suzanne Weyland Canale has written: 'A case study, use of citizens band radios in nursing homes' -- subject(s): Older people, Recreation, Nursing homes, Psychology, Citizens band radio, Recreational activities