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113 years ago today on 3 November 1906 an International Radiotelegraph Conference in Berlin selects "SOS" (· · · – – – · · ·) distress signal as the worldwide standard for help. In popular usage it is associated with phrases such as "Save Our Souls" and "Save Our Ship". SOS was
a German government maritime radio regulation adopted effective 1 April 1905, becoming a worldwide standard when it was included in the service regulations of the first International Radiotelegraph Convention signed on 3 November 1906, which became effective on 1 July 1908. SOS
remained the maritime radio distress signal until 1999, when it was replaced by the Global Maritime Distress and Safety System. SOS is still recognized as a standard distress signal that may be used with any signaling method.
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