I led a day hike yesterday on the AT from Keys Gap nobo to Harpers Ferry. Three miles into the hike one of the ladies slipped on a wet rock and went down, breaking her right wrist. One of the other ladies is Veterinarian and quickly managed a splint from two sticks and bandanas, and another person pulled out there water bladder (filled with very cold water) and we rested her wrist on it. In the meantime I got out my phone and dialed 911. I have Verizon and coverage there was excellent. An hour later we had firefighters coming up the mountainside and EMTs and a park ranger coming up the trail from Chestnut Hill Road. Then an ATV "gator" made it's way up the steep mountainside to us. They resplinted the wrist, got her up on her feet (she was in too much pain and was definitely not willing to try to hike out) and got her on the ATV and down to a waiting ambulance. The Vet went back with one of the EMTs to his vehicle on the road and he took her back to the HF visitors center to get her car so that she could get to the hospital to be with the injured hiker and get her back home. The rest of us went on to HF.
There is always chatter about how cell phones should be left at home, how no one needs to be connected all the time, etc. Only two of us brought a phone and the other one was nearly dead. Had I not had my phone to call 911 our only alternative would have been to turn around and go all the way back to Keys Gap, get the vehicle we'd shuttled up there in, drive all the way back to the HF visitors center and get the rangers to call 911. Because of my phone, the 911 dispatcher said that they had "pinged" me and knew exactly where we were on the trail and that's how the firefighters were able to come up the mountainside straight to us. The whole ordeal took an hour start to finish - not the hours it could have taken had we had to get back to the car and back to town. We're not fast hikers and it took us nearly two hours to cover that first 3 - 3 1/2 miles. No phone and we'd have been looking at a good 3 - 4 hours with that poor lady laying there in terrible pain.