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Greg,
I would think that if you don?t know the amount of error (drift from unknown 
current) you couldn?t build in a correction.  The unknown is just that, 
unknown.
All the best,
Robert Gainer

>
> From: "cfi@licfi.com" 
> Date: 2006/04/18 Tue PM 03:53:18 EDT
> To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
> Subject: Please tell me if I have this right
>
> To the List,
>    All - when doing a time sight at sea in period say circa 1780,
> I seem to have gleaned "the latitude used was the estimated latitude"?
> I assume this means latitude from a noon sight was applied (with DR
> corrections)to the time sight that was done 2-3 hours before or after
> the noon sight? while they certainly would not have traveled far at
> say 6 to 12 knots some error would have undoubtably crept in due to
> unknown currents etc. and it would not be impossible for the actual
> lattitude to be off by 2-4 miles. How did they compensate for this
> any ideas?
>                                    -Greg
>
>
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