We have been on many major rescues. Those on their way have 'NO CLUE" as to where they are going. Unless they frequent the area. The way we have worked it is GPS coordinates. That gives them a universal language they can work from. They are trained in map reading. We gave a BlackHawk lat lon coordinates and he flew direct to us from the Yakima Firing Range.
As a side note enhanced 911 does infact have mulitple names and street numbers for the same location. Steet names change from time to time. The old names are researched and cross-referenced.
Of another note always try your cell phone. It will surprize you that often you can get out.