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    Re: Celestial Navigation without a sextant.
    From: Paul Hirose
    Date: 2008 Mar 07, 22:20 -0800

    40 South wrote:
    > Supposing one was in a small boat with an accurate timepiece and the
    > necessary tables, how accurate could you determine your longitude by
    > observing the rising or setting of the sun or any other celestial
    > body?
    
    You could run an experiment using one of the online calculators at the
    U.S. Naval Observatory site. Enter a latitude and longitude (some
    convenient integer number of degrees) and note the calculated time and
    azimuth of sunrise. Then try changing the latitude or longitude by one
    degree and see how much difference it makes.
    
    http://aa.usno.navy.mil/data/
    
    The third link down is probably the best for this.
    
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