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    Re: Theoretical Question - Height of Eye from Shore
    From: Greg R_
    Date: 2007 Nov 16, 19:31 -0800

    --- Peter Fogg  wrote:
    > Nah. If the tide changes the height of the sea close to the shore
    > then presumably it changes the height of the sea at the horizon to
    > the same extent.
    Yeah, that was my original thought too - since the visible horizon is
    only a few miles "out there" the state of the tide should be pretty
    much the same there as at the shoreline...
    > The dip correction remains the same.
    ...but the flaw in that argument would be what I said earlier, that the
    measured shoreline elevation would depend on the level of the tide at
    the time. And if it were in some location that had a much higher daily
    variation (say 10' or more), that would definitely be enough to affect
    the He correction (seems like it works out to about a minute for every
    3 feet or so of He at these "low" levels - don't have an almanac handy
    right now).
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