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    Duttons Navigation and Piloting 12th edition
    From: Bob Crawley
    Date: 2016 Jan 24, 05:07 -0800

      Following a reference to this book in a Navlist post some while ago I found a copy. I wish I'd started Celestial Navigation with this book as it gives a very good explanation. It also covers a lot things I'd been curious about plus quite a lot I didn't know about such as:

    Correction for irradiation.
    Correction for air-sea temperature difference.
    Astigmatising shades - where can I get these?
    Chart projections, types and how they work.
    Differences in technique for Polar regions.
    Gyroscopic systems.
    Astro trackers.
    Doppler satellite navigation ( pre- GPS).
     
    All in all an excellent addition the library.
    BobC
       
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