Final answer:
SAR agencies use the Global Positioning System (GPS) satellite system to track emergency beacons.
Step-by-step explanation:
SAR agencies use the Global Positioning System (GPS) satellite system to track emergency beacons.
The GPS system is a network of satellites that constantly broadcasts their positions. Emergency beacons, also known as Personal Locator Beacons (PLBs), are equipped with GPS receivers that can pick up these signals and provide accurate locations.
When a distress signal is detected, SAR agencies can use the GPS coordinates to locate and rescue individuals in emergency situations.