Next message: Joel Jacobs: "Re: Clarification of Question regarding LAN"
Chuck said,
>The more traditional way of determining longitude was
>to use a time sight at the time the sun crosses the
>Prime Vertical (i.e., the time at which the sun is due
>east or due west of you). This procedure is described
>in Bowditch and elsewhere. It requires that you know
>your latitude, which you can get from a noon sight or
>from an observation of Polaris.
Chuck,
I don’t understand how that will work. The magnetic variation and the
latitude must be problems in that method. If you are at 23 degrees north
latitude or greater the sun is never due east or west. If you do not know
the magnetite variation with some degree of accuracy wont that have a very
large effect on the method? Is this practical at all?
All the best,
Robert Gainer
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