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    Re: Sextant frames
    From: Jeremy C
    Date: 2009 Apr 16, 09:19 -0700

    
    Brad wrote:
    >
    > As indicated in the Sextant Handbook, you should allow the sextant to reach
    > stable temperature before use. �The reason is exactly that, the thermal coefficient of expansion.
    > The sextant should not be warmed in the sun, as one side will be warmer than the other.
    >
    
    Of course this is optimum, however there are many times that I am
    running from the deck to lunch to shoot LAN in a span of 20 minutes,
    and if the bridge is a temperate 20 C and outside it is 35 or so, all
    I have time to do is let the mirrors warm sufficently to get rid of
    the fog and then look for LAN.
    
      I was just wondering if there was a difference that I needed to be
    concerned about.  It is good to know that it won't significantly
    affect my sights, at least to a degree that isn't overshadowed by
    scatter or other issues.
    
    Jeremy
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