The tree reference is for nav in forest or jungle canopy areas. A very few
trees will largely kill GPS. LORAN does not care. I have that exact
problem.

-John

============


> There is a system in the UK that already does that and used digital TV as
> well I believe. The accurate nav is only really needed in coastal water
> and
> the phones cover most of those. Ain't many trees in the middle of the
> ocean
> either John, but we are working on it as a disguse for deep sea oil
> drilling
> platforms :-))
>
> Alan G3NYK



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