In the international code, a "dash" is three times longer than a "dot."  On paper, “-” represents a dash, while “.” represents a dot. The letter “E” is a simple one, consisting of only one “.” Other characters are a little more challenging. For instance, “-.-.” denotes “C.”

If the letter has multiple dots and/or dashes, there should be a pause equal to the length of one dot between those parts. There are more spaces between characters, which equals three dots. Even longer pauses of seven dots should be used to separate words.

“SOS” is the most well-known Morse code phrase. SOS is an internationally recognized distress signal that was originally utilized by German telegraphers in 1905. Why did they select this letter combination? Believe that "O" is three dashes and "S" is three dots in International Morse Code. See, “dot-dot-dot-dash-dash-dash-dot-dot-dot.
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