Service Volumes of VOR's make no sense

On Sat, 14 May 2005 at 17:50:55 in message
, Peter Duniho
wrote:
"David CL Francis" wrote in message
...
The real earth is not of course that flat except over the oceans!

Actually, as long as we're being pedantic, it's not even flat over the
oceans. It's much flatter, but the Earth simply is not an ideal "smooth
sphere" anywhere on its surface.

I did not realise that I was being pedantic!

Also the further away you go the closer the horizon distance gets to being
the same as the height. It is obvious that from the moon you can almost
see the entire hemisphere.

Almost. But the difference is significant enough to matter when you
really care whether you can see the entire hemisphere (astronomy, for
example).

Of course. But the point is not important when considering VORs!


--
David CL Francis