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SOS is a Morse code distress signal ( ), used internationally, originally established for maritime use.In formal notation SOS is written with an overscore line (SOS), to indicate that the Morse code equivalents for the individual letters of "SOS" are transmitted as an unbroken sequence of three dots / three dashes / three dots, with no spaces between the letters. [1]
Morse code. Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs. [3] [4] Morse code is named after Samuel Morse, one of the early developers of the system adopted for electrical telegraphy .
By 1908, the triple dot-dash-dot code became the official international radio distress signal and remained that way until 1999, when Morse code was declared all but dead.
SOS is just that—SOS. It was derived from Morse code and recognized as an international standard signaling danger, or the need for aid. Using wireless telegraphy, it would sound like three-dits ...
Even though represented as strings of letters, prosigns are rendered without the intercharacter commas or pauses that would occur between the letters shown, if the representation were (mistakenly) sent as a sequence of letters: In printed material describing their meaning and use, prosigns are shown either as a sequence of dots and dashes for the sound of a telegraph, or by an overlined ...
Translated to Morse code, SOS looks like this: “. . . – – – . . .” Three dots, three dashes, three dots. At a time when international ships increasingly filled the seas, and Morse code ...
This distress signal soon became known as "SOS" because it has the same dash-dot sequence as the letters S O S with the gaps between the letters removed, and in fact is properly written SOS, with an overbar, to distinguish it from the three individual letters. In contrast, CQD is transmitted as three distinct letters with a short gap between ...
In that word, tall letters (those descending below the baseline or ascending above the mean line – b, d, f, g, h, j, k, l, p, q, t, or y) and capital letters represent dashes, while short letters (aceimnorsuvwxz) represent dots. To recall the Morse code for a character, try to visualize the word.