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    Re: Doniol for time sight reduction?
    From: Francis Upchurch
    Date: 2015 May 15, 23:09 -0700

    Thanks Greg and Dave.

    I did not know about Rust, but had the old 19th century Bowditch.(just found a copy of Rust for £12. ) I'll try the Rust + Otis King idea. (works well for Doniol Hc calculation). the Fuller does the Cosine formula fine. Dave, good idea re yet another slide rule! Maybe one day!

    Francis

       
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