What is the letters signified by the signal ( . . . ---. . . ) prescribed by the International Radiotelegraphic Convention of 1912 for use by ships in distress called?
sos — The letters signified by the signal ( . . . ---. . . ) prescribed by the International Radiotelegraphic Convention of 1912 for use by ships in distress. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00