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    Re: Consistent error question
    From: Bill B
    Date: 2014 Oct 02, 15:13 -0400

    On 10/2/2014 2:35 PM, Marty Lyons wrote:
    > Adjusted index error by shooting the sun with arm set at zero, made the
    > two images coincident and read index error, 2' on arc.
    
    I personally find it difficult to consistently superimpose the images.
    I'm of the opinion most of the list's members determine IE by making the
    limbs tangent with both upper and lower limb observations.
    

       
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