It's absolutely nothing like ADS-B. The only thing it does that ADS-B does is transmit a position, but that is to a amateur or amateur repeater station *if* it is in range. Outside of major centres the coverage rapidly disappears. You would be better to run a SPOT tracker than APRS. You could try it on HF, but if you could fit in even my little FT-817 HF, a wire antenna and antenna tuner the aircraft would be crowded and overweight.