The document discusses the use of a proximity detection system called "ShiftBoss" at the Moolarben Coal Mine. The system uses antennas and base stations to track equipment locations and warn operators if they get too close to other vehicles or hazardous areas. It allows silent communication between trucks and excavators and text messaging. While it provides warnings of potential hazards, it also has drawbacks like false positives, relying on "dumb" bubble technology, and potential to decrease operator attentiveness over time. The mine is evaluating whether current proximity detection technologies are suitable for their needs and how to best incorporate all vehicles and maintain safety.