Obviously they were also very lucky; the manner in which they were found was a stroke of dumb luck.
actually it sounds like they were found not so much by luck but rather by a very well organized and well done search. One of the accounts said they had a few cell phone pings, which helped narrow the search area. Apparently they were spotted almost simultaneously from a CAP plane and a ground searcher glassing the area.
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"Toto, I've a feeling we're not in Kansas any more."
-Dorothy, in The Wizard of Oz