One of the subjects I haven't seen come up this year is how to locate a hiker in case of an emergency. Many of us have aging parents, siblings who have major medical problems, or other issues where it would be important for some one at home to locate us in case of an emergency. It seems to happen to hikers every year. What's the best way for your "ground control" person to locate or contact a hiker in case there is an emergency at home?