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L'invio di SOS è la migliore pratica in caso di emergenzaTenere al sicuro CIASCUNO
The use of the SOS signal was first introduced in Germany as part of a set of national radio regulations, effective 1 April 1905. These regulations introduced three new Morse code sequences, including the SOS distress signal.
The Auto Alarm receivers were designed to activate upon receiving four such dashes. Once four valid dashes are detected, the automatic alarm is activated. The distressed ship's operator would then delay sending the SOS message itself to give off-watch radio operators time to reach their radio room.
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