Morse Code is communication.
Morse code is a method of transmitting text information as a series of on-off tones , lights , or clicks that can be directly understood by a skilled listener or observer without special equipment . To increase the speed of the communication , the code was designed so that the length of each character in Morse varies approximately inversely to its frequency of occurrence in English . Compared to voice , Morse code is less sensitive to poor signal conditions , yet still comprehensible to humans without a decoding device . Many amateur radio repeaters , for example , identify with Morse , even though they are used for voice communications . In an emergency , Morse code can be sent by improvised methods that can be easily `` keyed '' on and off , making it one of the simplest and most versatile methods of telecommunication .