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    Re: Cotter - copy located
    From: Gordon Talge
    Date: 2004 Sep 10, 18:37 -0700

    There is a copy of Cotter's History of Navigation in the
    Los Angeles public library in Norwalk.
    I have read and have tried to work my way through Cotter
    and have found quite a few errors.
    What I have found is to get a copy of say, "A Complete Epitome
    of Practical Navigation" by J.W. Norie 1840 or so or "The
    Complete Navigator" by Andrew Mackay ( mine is an 1807  American
    rip-off of a British Edition ) Or maybe something by John
    Hamilton Moore's "Practical Navigation" ( mine is 1798 although
    it has several errors and one procedure that is simply wrong ).
    My books, although old, are not in pristine condition and really
    did not cost that much, but are very  much still readable.
    Of these books I like Norie's the best. During this period, the
    18th to the 20th century, Britain ruled the waves and the
    British Navy was not just good it was damn good. It follows
    that when it came to navigation they knew what they were
    doing and were experts at it. The British books were the
    best. Most of the American stuff were just British rip-offs.
    Norie's is very clear, but practical. It does not give you
    formulas for things, but gives you directions in words. So
    instead of sin(x) = sin(y)+ cos(z), it would say "take y
    and z go to table VII or something and extract the sine and
    cosine of x and y. Add the two quantities together and then
    return to table VII and extract the inverse that gives the ..."
    To get the formula you have to piece it together from the
    The trig is done in an entirely  different, but equivalent way
    that is kind of neat. Norie also has a section on "Longitude by
    Observation" (Lunar Distance) along with a couple of different
    methods and several examples.
    So my idea is get the "who did what when, and what book they wrote
    or what method they used" from Cotter, but get the nitty gritty
    pencil and paper methods from some books like Norie or Mackay, the
    books that the people that actually navigated during that
    period used.
    Just my $.02
    -- Gordon
                                 (. .)
    | Gordon Talge WB6YKK           e-mail: gtalge AT pe DOT net |
    | Department of Mathematics      http://www.nlmusd.k12.ca.us |
    | Norwalk High School                   Norwalk, CA          |
    | (o-    Debian / GNU / Linux                                |
    | //\    The Choice of the GNU Generation                    |
    | v_/_                  .oooO                                |
    |    - E Aho Laula -     (  )   Oooo. - Wider is Better -    |
    +-------------------------\ (---(  )-------------------------+
                               \_)  ) /

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