Apparently, the ability of the iPhone to give the exact coordinates for where this man was stranded allowed the helicopter to arrive fast enough to save the man's life. From Stuff.co.nz:
A 20-year-old worker was found trapped under his 4WD, which had rolled on him, Feilding police Sergeant David Burmeister said.
''He'd been out there all night stuck underneath it.''
Weather conditions last night were ''terrible'' - wet and cold - with the temperature in single figures.
The man was found down a gully and the police constable on the scene was able to use his new iPhone to give the Palmerston North Rescue Helicopter the co-ordinates of where to land, Burmeister said. . . .