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Irrigation Guy · 06-02-2009, 08:13 PM

I've always known a VHF radio is good for about 17 miles. This is based upon the curvature of the earth and VHF signals traveling in a straight line. I believe the figure given includes a reasonable distance above the water for a boat antenna. A tall antenna sending or receiving would allow the comminucation to go through over a longer distance.

I will say, I did have an occurance where I needed to call the coast guard via VHF while off the coast of Gloucester. Funny thing was a received a reply from Coast Guard station Woods Hole(Falmouth), their antenna on a very high tower made that reception possible. They of course passed me along to Coast Guard station Boston and we worked things out from there.

06-02-2009, 08:13 PM	#41
Irrigation Guy Senior Member Join Date: Aug 2006 Location: Moultonborough, NH Posts: 484 Thanks: 89 Thanked 138 Times in 72 Posts	I've always known a VHF radio is good for about 17 miles. This is based upon the curvature of the earth and VHF signals traveling in a straight line. I believe the figure given includes a reasonable distance above the water for a boat antenna. A tall antenna sending or receiving would allow the comminucation to go through over a longer distance. I will say, I did have an occurance where I needed to call the coast guard via VHF while off the coast of Gloucester. Funny thing was a received a reply from Coast Guard station Woods Hole(Falmouth), their antenna on a very high tower made that reception possible. They of course passed me along to Coast Guard station Boston and we worked things out from there.