Automatic Position Reporting System
Just a few of the many sites.
 
Join ND-APRS here
 
Bob Bruninga
North West APRS  
N1BQ  APRS                       
KD4RDB APRS                    
 
 
Live APRS  Texas  At bottom of map, go to USA to see all states.                    
Live APRS   Near Dickinson
 
Findu   Find stations, raw data, breadcrumb trails, etc.
APRSWORLD Find stations, track a station, etc.
 
APRS-IS   Internet Service                                       
Citizen Weather Observer Program     
Vancouver Area Packet Organization