Why is "SOS" an international distress signal?

"SOS" is an internationally accepted signal to request rescue. In the past, when ships sailed on the ocean, they often encountered the dangers of pirate robbery or sinking on rocks. However, due to language barriers and different rescue signs in different countries, it was difficult to obtain quick rescue. In view of this situation, at the International Radio Communication Conference held in London, England, in 1912, the participants unanimously agreed to use the three dots, three horizontal dots and three dots (...) in the Morse code created by the American telegraph inventor Morse as the international standard. Signal for rescue. In Morse code, the code name of S is three dots and 0 is three horizontal lines, so people call the international rescue signal "SOS" for short. In 1912, when the large cruise ship "Titanic" was in distress during the voyage, the radio operator on the ship sent an "SOS" rescue signal to passing ships.

Due to the rescue meaning and international nature of "SOS", people later spread it and gradually became a synonym for asking for help in European and American countries. For example, when members of Western European peace organizations protested against the serious pollution of space caused by the two superpowers competing for space hegemony, they held up placards with the English letters "SOS" and shouted to people: "Save-ourspace" (meaning "Save-ourspace"). is "Save Our Space").