What are some scenarios that describe how APRS would be used in emergency or disaster situations, especially if there are only a few APRS capable units in vicinity of the emergency or disaster. I can understand the APRS abilities if ALL mobile operators could plot their locations, but I'm sketchy on a scenario with just a smattering of such devices. I guess if I'm out and about and I get into a jam, APRS could act in a manner similar to On-Star and locate my position for those who might be looking - they would need to know that APRS capability is located with me. Search and Rescue teams would benefit by everyone knowing where all team members are located. When Ham operators are doing public service communications, e.g. providing communications for a group of volunteers involved in a lake front clean up effort, knowing the whereabouts of the ham operators providing communications support along the lake front could be helpful. Other examples? Is anyone aware of a comprehenisve listing of the ways APRS communications have actually been useful? I could brainstorm potential scenarios all day, but I have no idea which of my user scenarios are practical.