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Thus the most common letter in English, the letter E, has the shortest code – a single dit. To increase the efficiency of encoding, Morse code was originally designed so that the length of each symbol is approximately inverse to the frequency of occurrence of the character that it represents in text of the English language. Since many natural languages use more than the 26 letters of the Latin alphabet, Morse alphabets have been developed for those languages, largely by transliteration of existing codes. The current or wave is present during the time period of the dit or dah and absent during the time between dits and dahs. Morse code is usually transmitted by on-off keying of an information-carrying medium such as electric current, radio waves, visible light, or sound waves. via sound waves or visible light, such that it can be directly interpreted by persons trained in the skill. Morse code can be memorized and sent in a form perceptible to the human senses, e.g. The letters of a word are separated by a space of duration equal to three dits, and words are separated by a space equal to seven dits. Each dit or dah within an encoded character is followed by a period of signal absence, called a space, equal to the dit duration. The duration of a dah is three times the duration of a dit. The dit duration is the basic unit of time measurement in Morse code transmission. Each Morse code symbol is formed by a sequence of dits and dahs. There is no distinction between upper and lower case letters. International Morse code encodes the 26 basic Latin letters A through Z, one accented Latin letter ( É), the Arabic numerals, and a small set of punctuation and procedural signals ( prosigns). Morse code is named after Samuel Morse, one of the inventors of the telegraph.

Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs. This Morse key was originally used by Gotthard railway, later by a shortwave radio amateur

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