Which of the following is an application of APRS?

The application of APRS (Automatic Packet Reporting System) that aligns with the information provided is the offering of real-time tactical digital communications, which includes the display of locations of stations on a map. APRS is utilized primarily for the real-time tracking of mobile stations, such as those used by amateur radio operators, and it enables users to see the geographical position of other operators on a digital map. This capability is especially valuable during emergencies or for event coordination where situational awareness and communication efficiency are paramount.

In contrast, the other options represent functions that either do not align with the core capabilities of APRS or focus on different communication systems and protocols that do not include mapping or location tracking features. For example, voice over internet connection and PACTOR packet transmissions discuss different aspects of amateur radio operations unrelated to the real-time deployment and visualization features that define APRS. Therefore, the emphasis on tactical communication and real-time mapping makes this option the most accurate representation of an APRS application.