First Use of S.O.S. Distress Signal

First Use of S.O.S. Distress Signal

The famous distress signal S.O.S. was first adopted as a universal signal and appeal for help in times of emergency during the early 20th century. It derives from the Morse code, a system of telegraph signals in which a pattern of dots and dashes sent electronically are used to represent all of the letters of the alphabet. The signal for the letter S is three dots and the signal for the letter O is three dashes, so the S.O.S. signal is an electronic transmission (or, occasionally, a transmission by other means, such as flashing lights) which conveys “. . . - - - . . .” or “dot dot dot dash dash dash dot dot dot.” This new distress signal was first used on June 10, 1909, by the Slavonia, a passenger ship of the Cunard Line which ran aground on the Azores in the Atlantic Ocean while en route from New York City to Trieste, a city now in northern Italy. A ship called the Princess Irene responded that same day and took 110 passengers aboard. The remaining 300 passengers were rescued the next day by the Batavia.