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    Re: Early Land Navigation.
    From: Brad Morris
    Date: 2015 Feb 9, 14:48 -0500

    Hello Frank Atkins

    Using a fence will inject subtle errors into your measurement.  The height of the fence must be at precisely the height of your eye at the moment of observation

    Breathing in or out will affect the height of your eye, and since the fence is so close, it will affect the angle measured. 

    As you have already noted, walking about the countryside with your fence is impractical. 

    You may wish to consider more standard tools for land observations.


    On Feb 9, 2015 1:27 PM, "Frank Atkins" <NoReply_Atkins@fer3.com> wrote:

    Some advice please.

    How would early inland explorers/navigators determined a noon latitude when the sun was too far south ,for instance, making the use of an artificial horizon impractical.

    I currently use a fence at home during the summer months but carrying a fence around the countryside is also impractical, plus the neighbors might object.

    Excuse the ignorance but my knowledge of celestial nav is rather limited.

    Frank A.

    33.53S 121.53E 2015 Local/Mon or there abouts.

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