Just to be pedantic, I calculated the rule of thumb as being 3.56*sqrt(h).
To be even more pedantic the distance to the horizon from a height of 1
metre is nearer to 3.57 kilometres (rounded from 3.568 248).
Don't forget that because a lightening flash could be reflected in clouds,
the range of visibility for lightening could extend *beyond* the horizon.
A very happy christmas to you all, and best wishes for the new year. 2005
was a very good year for metrication over here - I hope 2006 will bring
further advances for all of us.
---------------------------------------------------------
Tom Wade | EMail: tee dot wade at eurokom dot ie
EuroKom | Tel: +353 (1) 296-9696
A2, Nutgrove Office Park | Fax: +353 (1) 296-9697
Rathfarnham | Disclaimer: This is not a disclaimer
Dublin 14 | Tip: "Friends don't let friends do Unix !"
Ireland
