Category:Semaphore telegraphs

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A replica of a semaphore telegraph developed by Claude Chappe - Image by Lokilech

A kind of optical telegraphy in which information is communicated through towers with moving moving arms whose position expresses symbols, today can also refer to flag semaphore systems

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Semaphore Telegraphs Optical telegraph of Claude Chappe Attribution.jpg 450 × 600; 104 KB

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Telegraphy