OK, here's one for the folks that actually understand how EM propagation works in practice:
A couple of years ago, the current distance record was set for LoRa at more than 800 miles. The communication was between a fishing boat and one of the buoys in its fishery across open ocean. https://www.thethingsnetwork.org/article/new-lora-world-record-1336-km-830-mi
Frankly, I'm confused as to how that happened when, by my best guestimates, the unit on the buoy has a horizon at around 4 miles. The one on the boat, due to its greater height, had a horizon at more like 15 miles, but that still doesn't make it better!
Now, I was under the impression that signals in the 800-1000 MHz range sere strictly line of site, with neither ground nor sky propagation. Nonetheless, this event would imply that either I'm completely wrong about how EM propagation works, or somebody's fibbing...