“SOS”是国际通用的无线电报通信遇险信号。它是由莫尔斯电码点划组成的。SOS是1903年在德国柏林召开的第一届国际无线电报会议上首先提出,并于1906年第二届国际无线电报会议上经多次修改后确定的。自1912年发生大型豪华客轮“泰坦尼克”号被巨大冰山撞沉并造成1500余人葬身海底的惨案后,国际海 “SOS” is an international distress signal for radiotelegraph communications. It is composed of Morse code points. The SOS was first proposed at the first International Radiocommunication Conference held in 1903 in Berlin, Germany and was later revised several times at the Second International Radiocommunication Conference of 1906. Since 1912 a large luxury liner “Titanic” was hit by a huge iceberg and caused more than 1,500 people died in the seabed of the tragedy, the International Maritime