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    Re: Dip
    From: Frank Reed
    Date: 2021 Mar 9, 14:44 -0800

    David Fleming, you wrote:
    " I have seen cargo ships floating above the surface on Lake Superior in the Fall, cold air above relatively warmer water.  When observed the images are not so crisp"

    That's certainly the most suspicious aspect of the image. Of course it could have been photoshopped easily enough. It also might be real but misinterpreted. There's another explanation, which is covered in a detailed thread here: https://www.metabunk.org/threads/debunked-fata-morgana-or-mirage-hovering-boat-images-false-horizon.9112/.

    Thanks to Alexander Duytschaever for pointing out this link (in a post on FB).

    You also wrote:
    "and the sea horizon appears to have small christmas (evergreeens) trees dancing at the boundary."

    That's a nice description of the phenomenon. They do look like tiny trees! I call this "horizon confetti" since it seems as if the horizon is being shredded and tossed up into the air in a narrow band. The presence of that phenomenon guarantees that the horizon is bad, in a celestial navigation sense, but it doesn't work the other way. A slight variant on the refraction conditions can paint the sky across the horizon without any of that boiling "confetti" effect. 

    Frank Reed

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