What Does SOS Stand For? It's Probably Not What You Think
Many believe SOS has a specific meaning, but you'd be surprised to know that the letters aren't an acronym at all. That said, ...
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Wireless Signals
Although the U.S. lagged in adopting the new signal, the first SOS was transmitted from the American vessel "Arapahoe" in 1909, after a propeller shaft snapped. But CQD remained popular-primarily ...