Originally Posted by codprawn
Height makes all the difference.
Commercial airliners transmit on similar VHF frequencies and even their maximun transmit power is only 25w!!! I have often heard pilots talking to control coming into land in the Canary Islands and that is without strange conditions. That's a distance of 1800 miles - I suppose it helps when your aerial is 45,000ft above sea level.........
I don't know about 1800 miles but the principle is certainly sound - my 2 metre amateur sets (with expanded freq range) will pick up the incoming MOD flight when they call inbound at about 200 miles out and it is as clear as you could wish for. Calling from about 30,000 feet I think.
A Boat is a hole in the water, surrounded by fibreglass, into which you throw money...
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