read the passage save our soul (SOS)ones again and make a note from it
Answers
It means “I’m in extreme danger. Help me!” It’s a signal sent by radio from a ship that is in serious trouble (for instance, sinking). It could also be sent by other vessels - an airliner, maybe.
It was invented at a radio-telegraphic conference in Berlin, in 1906, and internationally adopted in 1908 (though another signal meaning the same thing - CQD - continued to be used as well for a while). A radio station receiving an SOS signal was obliged to organise a rescue, or, if they couldn’t, to pass the signal on so that someone else could.
Why the letters SOS? People assume that it must be an acronym - three words starting with these letters. They say that it’s short for “save our ship” or “save our souls” or “send out succour”. In fact it never was. Radio signals in 1906 consisted of Morse Code - patterns of short sounds (dots) and long sounds (dashes). SOS in Morse Code is dot-dot-dot-dash-dash-dash-dot-dot-dot. The thinking at the conference was that it was a highly distinctive pattern that couldn’t be misinterpreted.