SOS is the abbreviation of English SAVEOURSOULS (help us). In Morse code, S and O are the two most easily recognized and expressed English letters. Operators can send SOS distress signals by tapping "point, point, point" (S), "row, row" (O) and "point, point, point" (S) with their fingers. This point-and-line code telegraph system was developed by American Samuel? 6? 1 Morse invented it between 1835 and 1838. With the support of the US Congress, Morse opened the first cable and telegraph line between Baltimore and Washington in the United States in 1839, which is also the first cable and telegraph line in the world, and obtained the code patent right in 1854. In the famous Italian physicist Guglimo? 6? /kloc-After Marconi invented the wireless telegraph system at the end of 0/9, Morse telegraph coding became more popular all over the world and played an inestimable role in modern human communication. 1908, Britain and Germany reached an agreement to use Morse code SOS as a distress signal. When a ship sails in the vast sea, accidents often occur due to fog, storm, iceberg, reef, machine failure, collision with other ships and other reasons. Whenever a crisis occurs, the SOS distress signal will spread in all directions. After receiving the distress signal, the nearby ships will rush to the accident site to rescue the victims. 1In August, 909, the American ship "Arap" was unable to sail because of the broken stern shaft, so it sent out a "SOS" signal to the nearby coast and passing ships. This is the first time to use this signal. SOS was widely used until 19 12 April when Tanik sank.
Although it has had a glorious past and saved countless lives, it is out of date to use this code as a means of communication and emergency call for help under today's communication technology. In recent years, many countries in the world have adopted a variety of more modern communication signal sending and ship positioning methods to carry out rescue at sea. The new "Global Maritime Help and Safety System" uses satellite communication and positioning, which can not only send out distress signals quickly and clearly, but also report the exact position and details of ships in distress at the same time. All countries in the world have stopped monitoring and searching for the maritime radio emergency distress signal SOS. But "SOS", as a banner of emergency rescue, is constantly being carried forward in international rescue.