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Thanks.

gl

On Dec 13, 1:58�am, Anabasi...@aol.com wrote:
> Snip
>
> Sextants �and quadrants allow a greater
> range of measurement which might be useful �for lunar distance
> measurements, horizontal sextant angles for coast wise �navigation and in
> the rare case of a body within 30� of the zenith with an �obstructed
> horizon below it but a clear horizon in the opposite direction �in which
> case the navigator could turn his back to the star and use the �opposing
> horizon for the sight. (I don't know if this was ever actually �done in
> real life.)
>
> --------------------------------------------------
>
> This has been done in practice at sea. �I have done it several times �in the
> tropics when the sun is high. �Typically because at the regular �azimuth there
> is a thunderstorm that obscures or muddles the true horizon �but there is a
> perfectly good horizon 180 degrees out. �Shoot a backsight, �and you are good
> to go; as long as you remember how to do it. �It is also �in the US Coast Guard
> tests, but mostly as Hs to Ho reductions.
>
> Jeremy
> **************Make your life easier with all your friends, email, and
> favorite sites in one place. �Try it now.
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