Creation and monitoring of variable buffer zones

摘要: A system for monitoring operation and location of a movable entity, such as person, vehicle, equipment item or structure, at an activity site, construction mining that carries determination (LD) signal module to determine the entity's present location. When restricted hazardous occurs without warning (emergency) is scheduled occur selected (fixed moving) time interval on buffer zone surrounding determined, any entity within will come advised move be moved elsewhere during occurs, unless has associated priority greater than activity. The may vary with in size, other characteristics. Complex zones, resulting from overlap two more activated can also created monitored. Signals received by LD sources GPS, GLONASS LEO satellites, ground-based Loran towers.