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    Az, Z, Zc and Zn - which one is what? How to use them properly?
    From: Tony Oz
    Date: 2017 Apr 13, 00:08 -0700

    Hello!

    There is a rather long list of names for what I think relates to an azimuth: the Az, Z, Zc and Zn. How to use them properly? Where to read the rock-solid and definitive explanation of each of them? I guess the c in the angle name means it is the just-calculated value - same as with the Hc, but what the n or the lack of a letter is for?

    I ask this because in many places I read about the Zn as if it were not the true azimuth of a G.P. measured clockwise from the North but some other directional angle, often needing some further conversions.

    Could you please comment?

    Thank you in advance.

    Regards,

    Tony

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