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birdieponderinglife t1_itl7ond wrote on October 24, 2022 at 1:53 PM

Reply to comment by churdtzu in A train passenger saw a woman waving for help. It was a hiker who'd been missing. by guanaco55

Yep, to wave and get the attention of a rescue crew. Sometimes there is too much tree cover and that’s when something like a flare gun would be needed.