??? ???? ??? ??? ‘SOS’? ?? 100??? ???? ?? ????? 1? ????. SOS? ???? ? ????? ‘CQD(Come Quick Danger)’??? ????? CQD? ???? ??? ??? ?? ???. ? ??? ????????? 1908? 7? 1??? ????? ???? ?? ??? SOS? ????? ???.
SOS? ????? ??? ??? ??? ?????? ??? ?? ???. 1912? 4? ??? ??? ?????? CQD? SOS? ??? ????? ??? ?? ??? ??? ?? ??????. ? ?? 1500? ??? ??? ???. ?? ???? SOS ??? ???? ?? ?? SOS? ??? ??? ??? ? ????? ? ??? ????.
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