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    Re: Night moon sights
    From: Peter Fogg
    Date: 2004 Feb 3, 08:35 +1100

    D'ohh! Just when that one seemed sorted out!
    
    Have never noticed a false horizon ABOVE  the real horizon. But presumably I
    wouldn't?
    
    The first part made sense, we have probably all seen a sinking moon (or sun)
    with reflections right to the horizon. Tthe body partly hidden below the
    horizon makes that clear. Or does it?
    
    ----- Original Message -----
    From: "Trevor J. Kenchington"
    >.......For any given sea
    > state and height of eye, there must be some altitude below which rays of
    > light from the Moon strike the observer's horizon and there reflect to
    > his eye.
    >
    > Presumably, it is when the Moon is below that altitude that the
    > irradiation effect becomes important and the false horizon rises above
    > the real horizon. At a guess, small boats and high latitudes tend to
    > make for reflected light reaching to the true horizon and hence a raised
    > false horizon while large heights of eye and low latitudes tend to give
    > the reverse -- though I have never attempted a sextant sight under
    > either set of conditions, so this is purely theoretical for my part.
    
    
    

       
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