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    Re: Alain Gerbault logbook
    From: Lars Bergman
    Date: 2019 Jan 13, 06:06 -0800

    Paul,

    It seems that the logarithms used by Gerbault is log(the number of minutes of arc in the "arcs", divided by 1123.124). Why the table-maker use that odd number I cannot explain, it would have been much easier to use 1000; i.e. subtract 3 from the log of the moa number.

    I have tried to make a replica of the table used, with Gerbault's hour angle computation included, also including finding the azimuth.

    Does anyone have, or have access to, "The Alpha, Beta, Gamma Navigation Tables", by H.B.Goodwin?

    Lars

    File:
    Gerbault-Goodwin-like-table.xlsx
       
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