The last thing Olly Dale remembers before seeing a rescue helicopter flying up the valley was having lost all feeling in his feet as he got colder and colder.
The 17-year-old, rescued along with three friends in the Ruahine Ranges on Sunday, later learned medics believed he was just an hour from death.
And his friends weren't much better off.
"They gave us two hours before they were lifting multiple bodies out."
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This course is the entry level course for the tracking series. It introduce's participants to clue awareness, heightened observation and man tracking skills. Participants learn to distinguish between the characteristics of an undisturbed environment and the characteristics caused by human passage through the environment.