September 22, 1991 (, Xinwei August 15), the international distress signal instead of by GMDSS SOS.

1991 09 22 International SOS signals instead of by GMDSS SOS, SOS used as the international distress signal has been more than a century old.
1991 9 22, the International Maritime authorities decided to start from February next year to repeal the SOS signal, and switch to a new international maritime satellite electronic communications equipment, the advanced features of its international call system equipment, when you call "GMDSS & rdquo ;, all parts of the Earth can be heard quickly and with the communications and emergency relief work, even suddenly encounter an accident, press a button, all on the accident and the location data will automatically inform rescue authorities. Morse telecommunications equipment than in the past one minute, SOS Display 80 text quickly, accurately, and much more convenient.