Citizens’ Band: a radio system that people, especially truck drivers, use for talking to one another
spoken used at the end of your turn in a radio conversation to show that you have finished speaking and the other person can speak
to communicate with someone using a radio
to change the form of a radio message so that only someone with special equipment can understand it
ship-to-shore communication is between someone on a ship and someone on land
a piece of electronic equipment used for communicating with radio or radar. It sends a reply every time that it receives a signal.
a small radio that you can carry and use for communicating with someone else who also has one