obstruction

I thought this was a good one (it's a recent video and today is the first time I've heard this claim in a way that made any sense at all): Source: https://www.youtube.com/watch?v=Y_arVHYRPlg So, the guts of the claim are this: The guy sets up his table as such: The table represents the...

I've been working on a calculator that outputs the predicted visible amount of a distant landmark when there's an obstruction above the horizon, such as a view over terrain with a ridge or intervening mountain. It seems to be working pretty well, and I'd say it's just about finished, but I have...