This news story was in my email inbox and at first glance, it appeared to me as just another routine rescue of an injured hiker. Further reading suggests that an emergency (space) blanket may of been used to help signal to the SAR chopper. If this is actually the case, it was a good idea for that person to think of using the blanket as a signal device.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock