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    Re: Theoretical Question - Height of Eye from Shore
    From: Peter Fogg
    Date: 2007 Nov 17, 17:49 +1100

    Greg R. wrote:
    ... that's what prompted the question in the first place. Last time I
    was out there taking sights I seemed to get some sort of "systemic
    error" (referenced to a known GPS position) that I couldn't account
    for. Index error is always dialed to zero on both the Davis and the
    Astra sextants, and I couldn't believe that my technique had suddenly
    gotten that "sloppy".

    Been there. Once you know the position then the only obvious variable can be the Height of Eye, that may have to a guesstimate.

    It strikes me as quite amazing, but seems to be true, that you can work out fairly accurately the height of your local cliff via this process of making and reducing celestial observations.

    I never thought of tidal influence but like your situation, tidal movements around here are fairly small.

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