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    Re: Smart and Shearme Position Line Tables
    From: David Pike
    Date: 2020 May 6, 09:36 -0700

    DavidC
    Thank you for the azimuth formulae from various sources.  You've given me plenty to wage through.  I've not studied the Admiraly Navigation Manual, so I can't suggest why two of the formulae are not included.  If I were to start researching that question, I think I would start with "why would an RN Officer need azimuth" followed by "Is there somewhere better they could find it?  E.g. does it fall out as part of a different calculation". 

    However, you quoted 'd h t   sinz = sin t cos d sec h  Bowditch  1958 p 567' . Was there no caution printed in the text surrounding this neat, plausible, and ..... manipulation of the spherical sine rule?  DaveP

       
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