"Antoñio" wrote in message ...
If the VOR is a "line of sight" signal device. How can there be varying
distances of service at varying altitudes? I mean, shouldn't I be able
to pick up a VOR radial from the moon as long as no obstructions
intervene?

NEWSFLASH -- THE EARTH IS NO LONGER BELIEVED TO BE FLAT !!!

(at least my *most* of us)