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    Re: Measuring (and Calculating) Dip - sighting technique
    From: Bill Morris
    Date: 2013 Mar 20, 20:27 -0700

    Hi Bruce

    As far as I remember, most of the time the horizon, though difficult to define exactly because of its irregularity, remained in the same place and then suddenly rose or fell (and not because I leant on the tripod!). When I have time, I will see if there is indeed a periodic rise or fall, but I am inclined to think that if there had been I would have adopted some sort of averaging process. At the time, we were in the middle of a large area of high pressure and there was no wind to make my anemometer rotate, so practically no waves to superimpose on the swell.

    Bill Morris
    Pukenui
    New Zealand
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