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    Re: Latitude of prime vertical sight
    From: Paul Lee
    Date: 2007 Jul 31, 03:44 -0700

    Hi Frank,
    The local sunrise had been determined in retrospect by an astronomical
    program.
    The prime vertical sight would be taken about this time.
    
    Best wishes
    
    Paul
    
    
    On 31 Jul, 00:31, Frank Reed  wrote:
    > Hi Paul. You wrote:
    >
    > "I'm new to navigation, and am doing some work on the usage of prime
    > vertical sights. I know it gives longitude, but if you knew the time
    > of sunrise, is it possible to obtain a value for lattitude too? "
    >
    > Welcome aboard. I'm not entirely sure what you're asking here. Are you
    > saying that we've recorded the local time of sunrise? Perhaps at
    > sunrise we look at a watch and note that the time is 0701 and later
    > when we take the time sight the time is 0914. With that difference in
    > time and the measured altitude for the time sight, you could
    > presumably calculate the latitude. Is that what you have in mind?
    >
    > -FER
    
    
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