On 13 May 2011, at 18:05, Dave G3WCB. wrote:

More info here, including a nice coverage map. 100w goes a loooong way...

At least, when one realises that 120 nm means nautical miles, not nanometres ;-)

Many of those long distances are at aircraft heights, where the jammer will be 
line-of-sight. I remember hearing the first amateur radio from a Shuttle: they 
were using about 2W on 2m, range nearly 1000km, and we picked it up on a Slim 
Jim into an ordinary rig. Signal as clear as if it had been from the next 
village.

73,
Chris G4OKW

-----------------------
Dr Chris Trayner
School of Electronic & Electrical Engineering,
The University of Leeds,
Leeds LS2 9JT, United Kingdom
Tel: +44 113 34 32053
Fax: +44 113 34 32032