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    Re: How close without a good Lunar?
    From: Francis Upchurch
    Date: 2018 Jul 24, 09:23 -0700

    Robert,

    I agree, you need the moon (altitude or preferably LDs) to get time, or the Jupiter moons( not very practical at sea) or known position and work backwards.

    I've tried all these. Jupiter moons very difficult on land with a  good telescope. At sea, well Galileo and many since  tried and failed. I am thinking maybe a modern cam stabiliser? 

    I find proper LDs much easier  and more accurate than the altitude method. The maths are actually  easy with my slide rule or calculator. 

    For me, lunars every time.

    Francis

       
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