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The method I used to use was to consider that on the day of the full
moon, the luni-tidal interval listed in Bowditch for a given place
would be the time of high tide.

From my 1933 Bowditch, the High Water Interval for New London is
9h30m. So on the  day of the full moon - tomorrow 4-9-09 - high tide
at New London would be 0930 EST or 1030 DST.

I don't have any tide tables here, so would a kind soul on the List
look it up and see how old Nathanael did?

Thanks, Hewitt

On 4/8/09, frankreed@historicalatlas.com  wrote:
>
>  Hi Dave.
>
>  Next, try some place more tropical. Hawaii perhaps? :-) That should show 
significantly worse behavior with respect to azimuth.
>
>  I wrote some code a few years back to do tidal calculations. It's much 
shorter than the widely available X-tide code and only marginally less 
accurate: http://fer3.com/arc/m2.aspx?i=100454.
>
>  Here's a question that's been in the back of my head for a long time... 
which is a better predictor of tide times: the local hour angle of the actual 
Moon or the local hour angle of the mean Moon (which we can imagine moving 
along the celestial equator with constant angular velocity)?
>
>  -FER
>
>
>
>
>  >
>

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