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George:

Yes, I did get it backwards, and thanks for setting things right.

Jim Wilson

On Tue, 25 Jan 2011 07:58:29 -0000 "George Huxtable" 
writes:
> Jim Wilson wrote-
>
> I'll attach a diagram which shows that N-S vessel movement or
> declination
> change affects time of meridian passage. Time of highest altitude is
>
> different from this.
>
> ==============
>
> Hasn't Jim said that the wrong way round? From a fixed longitude,
> the time
> of meridian passage is unchangeable, affected only by the rotation
> of the
> Earth and the position of the Sun.
>
> What changes, depending on the North-South speed of the vessel, and
> the
> North-South motion of the Sun in declination, is the time of highest
>
> altitude.
>
> George.
>
> contact George Huxtable, at  george{at}hux.me.uk
> or at +44 1865 820222 (from UK, 01865 820222)
> or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
>
>
>
>
>
>
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