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    Re: Lunar distance measurement in ideal conditions: attainable accuracy.
    From: Alexandre Eremenko
    Date: 2013 Jan 8, 00:22 -0500

    Dear Bill,
    > Well the ratio of the variances of the index errors is 2.07, which is
    > nearly 2.12, the f-ratio for significance at the 5% level. I don't really
    > know what I'm talking about
    One does not need to know all these variations, and even less f-ratios:-)
    Just look at your error column with your naked eye.
    In lunar-1 your error varies from -0'2 to +1.8 and it is at least 1'
    in almost half of all observations.
    In lunar-2 the error is always between -0'3 and +0'3. And it is between
    -0'1 and +0'1 in more than half of the shots.
    Without any knowledge of statistics you can tell that lunar-2 is excellent,
    and lunar-1 is "so-so":-)
    Usually a lot of practice is required to achieve such progress.
    > "How does Cook describe his position...?
    > Cook writes "...Cape St Diego bore at that time SBE (south by east)
    > distant about 4 leagues."
    Is Cape St Diego the most Eastern end of Tierra del Fuego?
    Google maps does not react on "Cape St Diego".
    If my understanding of what is Cape St Diego is correct than the author
    of the footnote has the latitude wrong:-)
    Which raises a general question:
    Do there exist any GOOD geographical maps on the Internet?
    I mean the maps which have
    islands and straits and capes names in the uninhabited areas like Canadian
    Arctic, for example. I recently read a book on Polar exploration, the book
    did not have
    good maps and I started looking on Internet. Google gives contour maps
    of those areas without any labels of islands, straits, capes and other
    geographical features. And to my surprise I was unable to locate any
    reasonable maps.

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