The quoted range of a UAS should be considered as a quoted signal penetration statement. The longer the range, the further it can fly through radio interference, trees, glass, plastics and other objects that may partially block the operator's view of it. Example, compare 2 drones in a forest. A drone with a 3 mile range may only be able to penetrate the forest by 2000 feet, while a drone with a range of 1 mile, may only be able to penetrate the forest 500 ft. Unfortunately, drone manufacturers don't have a good way of telling the consumer how far a drone can go if it's blocked by certain types of objects, materials and their densities. So, they simply use range as a way to tell the consumer how well the signal penetrates interference. I wish there was another way to express drone signal penetration, but there really isn't.