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    Re: Lat/Lon by "Noon Sun" & The Noon Fix PROVE IT
    From: Hewitt Schlereth
    Date: 2009 Apr 24, 20:42 -0400

    George, what I get from this is that the coordinates at the ends of
    the top two rows of "noon1a" are Lat/Lons of the actual positions from
    which the (perturbed) Hs's were generated. To me that means they are
    in the same category as GPS fixes.
    
    Comparing to GPS was something I was never able to do, because my
    active sea days were over by the time it was in place. All I had to
    judge my accuracy by was a DR. Also, my actual use of this
    equal-altitude method was limited - perhaps a dozen or so times, as I
    mentioned to Frank once when he asked.
    
    As far as comparing to DRs goes, the technique gave me the same
    results as advancing sun-lines did. So I trusted it. These "noon 1a"
    Lat/Lons, though, give me a better standard- mathematically defined
    positions - to gauge against.
    
    So, what I plan to do is find equal (or nearly equal) altitudes from
    the data in the top two rows of "noon1a" as I did before from your
    ".xls" spread-sheet and see if the method continues to hold up against
    what is, in effect, a virtual GPS fix.
    
    I'll send the two worksheets in my next post.
    
    Hewitt
    
    On 4/24/09, waldendand---.com  wrote:
    >
    >  The DR is N56, W10.
    >
    >
    >
    >  >
    >
    
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