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#1: If at night, by use of a searchlight to send Morse Code. A regular flashlight will only work if you are in front of a very DARK background.
#2: Day or night: Radio Morse code.
#3: Daytime: Signal flags along your forestay or backstay.
#4: Daytime: Semaphore flag signalling.
#5: Day, or night with searchlight shining on it: Hang your country flag upside-down. This is the internationally-recognized sign of distress.
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Earn +20 ptsQ: What two modern day ways of signaling SOS distress while sailing?
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