"James Taggart" wrote
That certainly soils Glen Ashmore's credibility. One would begin to
wonder if his success is built more on luck than knowledge. Here's
another website offering the same arguments:

http://www.zytrax.com/tech/wireless/fresnel.htm



Did you actually READ that article? You probably stopped at the phrase
"With apologies to Mr. Fresnel" thinking it was a refutation when actually
the author was stating that he was vastly simplifying the principle.

The article confirmed exactly what I said! "The strongest signals are the
ones closest to the direct line between TX and RX and always lie in the 1st
Fresnel Zone. The rule of thumb is that 60% of the 1st Fresnel zone must be
clear of obstacles." With an omnidirectional 6 to 9db antenna (which is
the only practical option for a boat moving around an anchor or mooring) on
deck every hull and the water surface between you and the access point will
be within zone one. As you get higher the less water and other boats are
within zone one. The stronger you can get the signal in zone one the less
the reflections from the other zones matter. In other words, for best long
range performance Get Higher! D yourself a favor and learn something. Play
around with the range calculator they link to. It is similar to the one I
use.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com