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    Re: Dip uncertainty
    From: Fred Hebard
    Date: 2004 Dec 7, 14:54 -0500

    On Dec 6, 2004, at 11:48 PM, Trevor J. Kenchington wrote:
    > Fred,
    > You wrote:
    >> On Dec 6, 2004, at 9:16 AM, Trevor J. Kenchington wrote:
    >>> With anything of a sea running, of course, the uncertainties in the
    >>> horizon and in the true height of eye that are produced by wave
    >>> action
    >>> are likely to overwhelm anomalies in dip for an observer close to the
    >>> sea surface (except perhaps under the most extreme conditions).
    >> Bruce Bauer had exactly the opposite take on this.
    > Can you provide a page reference? I have re-read his section on
    > rough-weather techniques and I can't find that he mentioned height of
    > eye. Or do you mean his comment that a navigator on a ship's bridge
    > should allow for wave height when applying the dip correction whereas a
    > yachtsman should not?
    I meant his comment about allowing for wave height.  My take on it was
    that he thought the small boat guy was better off.  This might be true
    in a smooth high sea, if one could be quick enough to get the sight.
    Put some chop on top of big rollers and it might be a different story.
    I myself have never experienced this, to my regret.

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