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    Re: Admiralty Manual of Navigation Vol III
    From: David C
    Date: 2017 Apr 7, 21:36 -0700

    Frank Reed you wrote

    "Volume  II of the 1928  Admiralty Manual of Navigation also has the mathematical proofs. "

    I don't have the 1928. How does this section from p.156 of the 1914 Admiralty Manual of Navigation compare?

    Here are two  methods from the 1928 manual.

     I must admit that I have not studied these proofs in any detail but  I can relax,  knowing that if I wake up in the night desperate to understand the subject I can quickly lay my hands on the information (-;

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