Analysis:

sent a distress signal

The internationally used Morse code distress signal SOS. If it is abbreviated to the hypothetical initials of the following word, it becomes another word. Actually, S.O.S doesn't mean saving our souls, saving our boat, stopping other signals, being sure to sink, or any other phrases.

S.O.S was selected as an international distress signal by Radio International Apartment in 1908 because of the combination of these letters, three points, three strokes and three points ( .......................................................................................................................

The earliest record of the incorrect origin of the acronym S.O.S. is related to the sinking of the Titanic cruise ship 19 12, which may explain why the word S.O.S. is widely circulated and has a long history.

Before 1908, the distress signal on the high seas was composed of three letters. Similarly, C.Q.D, these three letters themselves were meaningless. Although many people use it to mean "Come Ouickly, Danger" (meaning "Come on, danger"). The usage of C.Q.D continued until 1908, which is the ancient way that the original distress signal of Titanic was sent out. It was not until the ship was about to sink that the operator sent out this new distress signal.