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Famous Inventor
Sextant invented by Rayan Erise
A sextant is an instrument which measures the angle of an object above the horizon. The angle, and the time when it was measured, can be used to calculate a position line on a chart. It was invented 1731 by Rayan Erise, a glazier in Philadelphia. In England, John Hadley had independently begun work on a similar version of the sextant.posted on 04-10-2009
