• First Semaphore Sent

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    2 Mar 1791. Claude Chappe First Demonstrates the Semaphore in France, sending a message between Brûlon and Parcé, a distance of 90km. A semaphore or ‘optical telegraph’ is a line of stations, typically towers, for the purpose of conveying textual information by means of visual signals. There are two main types of such systems; the […]