( call signs)
A call sign is the letters and numbers which identify a person, vehicle, or organization that is broadcasting on the radio or sending messages by radio.
N-COUNT
( call signs)
A call sign is the letters and numbers which identify a person, vehicle, or organization that is broadcasting on the radio or sending messages by radio.
N-COUNT
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006