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    Usefulnes of inspection tables
    From: Gary LaPook
    Date: 2007 Oct 07, 13:23 -0700

    Inspection tables such as H.O. 214 and H.O. 249 can be more usefull
    for some things than the trig based tables, H.O. 211, H.O. 208,
    A.A.A., Weems Line of Postion Book, etc. and calculators.  Sometimes
    it is quite helpfull to be able to just run your finger down the
    column of precomputed altitudes and azimuths to find the answer to
    your question. (I don't extend this comment to H.O. 229 due to the
    different arranagement of the tables.) H.O. 214 is especially usefull
    in this regard since it tabulates the difference between adjacent
    values due to change of declination (delta d)  and also the difference
    between adjacent values due to the change in LHA (delta t.)
    Regarding H.O. 214, I have seen it mentioned that a number of errors
    had been found in these tables, is there a source for errata sheets?
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