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    Re: longitude by lunar distance
    From: Doug Rynda
    Date: 2012 May 11, 14:36 -0700

    Paul

    It is confusing because, prior to the Twentieth century, navigators usually thought of Longitude in terms of time rather than angle. That’s why Slocum says that to find your Longitude you compare your local time with GMT. Nowadays we would say to add or subtract the Local Hour Angle of a body from the body’s Greenwich Hour Angle. It amounts to exactly the same thing.

    Doug Rynda
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