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    Green Flash and Longitude
    From: Frank Reed CT
    Date: 2006 Jan 4, 01:16 EST

    On a page of unresolved issues on Andrew Young's collection of web pages on
    the "green flash", he writes:
    "In his 'History of Nautical Astronomy', C. H.  Cotter makes the tantalizing
    remark that 'The method of finding longitude from  an observation of the Green
    Flash which occurs in favourable meteorological  conditions when the upper
    limb of the Sun sinks below the visible horizon has  been suggested on many
    occasions during the present century.' "
    Andrew Young then asks:
    "Oh? Care to cite a reference? Where did this  idea come from? Has anyone out
    there ever heard of this before? Let's hear when  some of those 'many
    occasions' actually occurred! "
    Good questions. So has anyone on Navigation-L ever heard of this? I  haven't.
    I can't think of any way to make sense of the idea (green flash for
    longitude??), but that doesn't mean no one ever suggested it, of  course.
    42.0N 87.7W, or 41.4N  72.1W.

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