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    Re: Art and Navigation
    From: Carly Butler
    Date: 2015 Mar 29, 20:13 +0100

    Oh boy - ok, as scary/embarrassing as that idea is Greg, I will dig out my calculations next week and post for you to check (laugh at).   : )

    On 26 Mar 2015, at 18:28, "Greg Rudzinski" <NoReply_Rudzinski@fer3.com> wrote


    I agree that trying to keep a sextant's index error exactly at zero is futile but this should not be an excuse for never adjusting the horizon mirror. Carly's Mark 3 without a case will be very demanding on index error stability. I will suggest a plastic food container fitted with customized foam as something to try. 


    If you post all your sight reduction data (a picture of working notes should be good enough) then we can check things out. 


    Greg Rudzinski


    From: Tom Sult
    Date: 2015 Mar 25, 11:15 -0700

    The goal is not to zero your sextant, but to know the error. I like my sextant to have several min of error ON the arc. Trying to be exactly zero is hard and rarely lasts. Testing error before a round of sights then adding or subtracting it is more practical. 

    Tom Sult, MD
    Author: JUST BE WELL

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