Which of the following is an application of APRS?

APRS stands for Automatic Packet Reporting System. It is a specialized digital communications protocol used by amateur radio operators to transmit real-time tactical information, most notably GPS coordinates, weather data, and short text messages. Because APRS continuously broadcasts location data, it is famously paired with mapping software. This allows users to view a live map showing the exact geographic locations of mobile stations, weather stations, and other tracked objects. Options involving voice over internet or PACTOR packet counts are incorrect. While hams do use the internet to link repeaters (using IRLP or EchoLink), APRS is strictly focused on digital packet data for tracking and tactical updates.