Let me propose a test. It will take some effort to set up, but it is entirely feasible.

Lake Pend Oreille is within reasonable driving distance for me. Somewhere near the Sam Owen Campground on the northeastern shore should give direct line-of-sight over 15 miles down the lake toward the shore near Farragut State Park. What do you predict I should see? What do I predict I will see? What will I actually see?

#empiricism

the difficult part will be getting a good enough lens and camera system to clearly document what I find.