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    Index Correction
    From: Robert Eno
    Date: 2007 May 4, 13:25 -0400
    General question to the list:
     
    It is common practice to check for IC before and after a round of sights. In my experience, they are seldom the same particularly when taking sights under non-standard temperatures.
     
    Question: what correction would you apply?  Generally what I do is a combination of fudging and black magic but it usually entails simply taking the two ICs and averaging them to arrive at a single IC that can be applied to the entire round of sights.
     
    Please: I am not looking for involved statistical computations. I am trying to determine what other navigators do in the field/at sea.
     
    cheers,
     
    Robert

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