This New Zealand hiker found a man lying in a stream in the woods with a head injury.

The hiker used his PLB to summon help (no cell coverage), but the helicopter had trouble locating them due to the tree canopy, and (judging by the photo - see linked article below) there was no place to land nearby.

The hiker found a spot of sunlight and used his signal mirror through a gap in the canopy to signal the helicopter. ( Since he's in a Commonwealth country, he refers to it as a "heliograph mirror").

A paramedic was winched down, and the victim winched out.

NZ Herald - Inventive tramper saves hurt man's life

(This earlier NZ Herald report gives the paramedics name and the date (March 31st), but doesn't mention the mirror.)

Edited by rafowell (04/06/14 05:51 AM)
Edit Reason: Add date
A signal mirror should backup a radio distress signal, like a 406 MHz PLB (ACR PLB) (Ocean Signal PLB)