As formidable a piece of ironmongery as one would wish to encounter. In actual fact it is merely an instrument that measures the angle a heavenly body (star, planet, sun, moon) makes with the visible horizon. It derives it's name from the arc at the bottom which is one sixth of a circle. The principles of a sextant are easy to master but its use requires some skill and practice. Small errors make for large discrepancies in one's position.
See how that works? Light (the males feminine) is reflected off one mirror to another who decides if she desires to mate with the male…
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