The “-.-.–.–.” and “………-.-.-.” (“SSSDDD”) presented by Marconi at a previous meeting were judged too complicated. In Berlin in 1906, participants sought to develop a worldwide standard distress call at the International Wireless Telegraph Convention. As time went on, it became more critical that the signal be heard from a relatively long distance away–that’s why the letters are capitalized. SOS is an acronym for three letters: “Save Our Ship.” The combination was chosen because the Morse code only has the letters ‘M’ through ‘W,’ so the SOS sequence seemed to be an excellent fit. It was initially invented by the British Royal National Lifeboat Institution and adopted as an international standard signalling the need for immediate aid.

SOS (meaning Save Our Ship) is a distress signal that seafarers have used since 1838. SOS: What Does It Stand For And Why Was It Chosen? Save Our Ship

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What Does SOS Stand For, And Why Was It Chosen?.

SOS: What Does It Stand For And Why Was It Chosen?.

What does sos mean in morse code