In a broader sense, a sundial is any device that uses the Sun’s altitude or azimuth (or both) to show the time. In addition to their time-telling function, sundials are valued as decorative objects, literary metaphors, and objects of mathematical study.
I believe that sums it up quite nicely!! This would make a lovely gift not only for those who enjoy the sea, but for those into literary metaphore and those objects of a mathematical nature. Or they just love old looking shiny objects that have a function!
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