Advertisements Back when I was installing C-band dishes I had a little plexiglass gadget that was basically a site, sort of like a transit. You would orient it by a built in compass and level while standing at the preferred dish location and simply look through it. If you saw sky instead of trees for each azimuth/elevation, you were golden. Otherwise, you found a better location for the dish. But, as many times as I used it, trying to predict success by simply eyeballing it (without this tool) first was usually not accurate at all. I would be wary of an installer who immediately announces the probability of sucess in marginal situations like that. They might have some latent pathological need to impress you with phony expertise, or maybe they are motivated to NOT do your install.