![]() The SOS was actually brought into use in 1908, but it's adoption by maritime stations was very slow. ![]() The CQD signal was devised by the Marconi Company and was intended to mean 'All Stations - Urgent', but was popularly misinterpreted as 'Come Quick - Danger' or 'Come Quickly Down'. Tree years later the Titanic used it to signal the sink of the ship. Two steamers received her signals and went to the rescue. The first time the 'SOS' signal was used in an emergency was on 10 June 1909, when the Cunard liner SS Slavonia was wrecked off the Azores. SOS was chosen because it could not be misinterpreted as being a message for anything else. In Morse code SOS signified by three dots, three dashes, then three dots ( ![]() Why was SOS chosen to signify a distress signal? The signal was formally introduced on 1 July 1908. On 3 October 1906 the 'SOS' signal was established as an International Distress Signal by an agreement made between the British Marconi Society and the German Telefunk organisation at the Berlin Radio Conference.
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