I'm decades removed from my old APRS days, but I remember using a software program, I think it was called WinAPRS, hooked to the radio which showed my location, and everyone else's on the laptop screen. I used a Kenwood V7A and a Kantronics KPC-9612 with a laptop (three pieces of equipment). Now days you can get that down to at least two pieces of equipment with a HT and laptop, maybe even a tablet.