On 17 Jun, 18:08, Paul Hyett wrote:
On Tue, 17 Jun 2008 at 01:32:31, Graham Easterling
wrote in uk.sci.weather :



Excellent visibility dowm in SW Cornwall - Lundy easily visible from
the back of St Ives (around 100km?)

I don't think the curvature of the Earth even allow visibility over that
distance.

I tried plugging some numbers into this :

http://www.ringbell.co.uk/info/hdist.htm

... and you'd need to 800m up for the horizon to be at 100km - and I
know there's no land that high around St Ives.
--
Paul Hyett, Cheltenham (change 'invalid83261' to 'blueyonder' to email me)

Well you'd be wrong. remember the moors behind Penzance are around
600', and Lundy's pretty high. Through binoculars it's even possible
to see the top of the lighthouse in the right
conditions.


Graham
Penzance