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Daigor Posted on10:12 pm - Oct 2, 2012

Semaphore, method of visual signaling, usually by means of flags or the invention of the telegraph, semaphore signaling from high towers was used to transmit messages between distant such system was developed by Claude Chappe in France in , employing a set of arms that pivoted on a post; the arms were mounted on towers spaced 5 to 10 miles (8 to 16 km) apart.