Double Delight

[Stuart]

I’m sure I’ve heard it said that from the top of Emley Moor, you can see both east and west coasts on a clear day

From sea level "The furthest distance to the horizon that the human eye can see varies slightly depending on a person's height. In miles, the horizon is approximately 3.1 miles away"

Being 50 feet up on top of a transmitter on a hill won't change your visual distance very much, just the range of the signal.

You might just be able to see both the east and west coast of the UK from an aeroplane at 35,000 feet on a very clear day, if you were able to swap seats or crawl over other passengers to look out of a window on the other side.

[Inspector Sands]

Yes according to the horizon calculator I just looked at from the top of Emley Moor the horizon is 39 miles away

[Markymark]

Yes according to the horizon calculator I just looked at from the top of Emley Moor the horizon is 39 miles away

Yes, sounds about right. That assumes no obstruction to that view. The hill that Holme Moss sits on is the same height as the top of Emley's mast, so everything the other side of it is obscured.

If it wasn't Emley's signal would storm into Lancashire (which it doesn't!) Only a dribble arrives, due to a small level of defraction

[Markymark]

Guess it might be the same with trying to get a mobile signal under a mast.

Yes, the same principles apply,