SOS is a Morse Code distress signal. Morse Code is a system that uses dots, dashes and spaces to communicate letters and numbers. It was first created during the 1830s by Samuel F.B. Morse but was ...

The distress signal CQD originated from the signal CQ, expressing "seeking you," or "all stations." The signal CQ was commonly used among wireless operators -- and land-based telegraphers before ...

You know it’s a distress signal, but what does “SOS” actually stand for? A lot of people think it’s an abbreviation for “save our souls” or “save our ship.” But those phrases are ...

In the 1920s, Frederick Stanley Mockford, an officer overseeing radio operations at Croydon Airport in England, faced a crucial task: developing a clear and concise distress signal for pilots.

By Michael Levenson It has been a widely recognized symbol of distress since the nation’s founding, when sailors turned the American flag upside down to signal that their ships were sinking ...