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| | SOS - Wikipedia, the free encyclopedia |
 | | In modern terminology, SOS is a "procedural signal" or "prosign", and the formal way to show that there are no internal spaces when it is sent is to write it with a bar above the letters, i.e. |
 | | However, procedural questions were beyond the scope of the 1903 Conference, so although Article IV of the Conference's Final Protocol, signed August 13, 1903, stated that "Wireless telegraph stations should, unless practically impossible, give priority to calls for help received from ships at sea", no standard signal was adopted at the time. |
 | | SOS has also sometimes been used as a visual distress signal, consisting of three-short/three-long/three-short light flashes, or with "SOS" spelled out in individual letters, for example, stamped in a snowbank or formed out of logs on a beach. |
| en.wikipedia.org /wiki/SOS (1357 words) |
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