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    Re: Horizon refraction: photos of changes
    From: UNK
    Date: 2013 Apr 20, 16:12 -0700

    Marcel,

    I just wonder where to find a location that is "a good one for making refraction dependent measurements"? I guess you may handpick a few selected places in the open ocean that are far from land and free of currents. Unfortunately, these are the places where the navigator has the least interest in exactitude.

    Most places where we navigate feature notorious warm or cold surface currents with side arms, changing eddies, counter eddies and what not. While they are often obvious to the naked eye, the corresponding abnormalities of refraction go undetected. Frank's photos show that they must be there.

    Herbert Prinz


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