bn:00870187n
Noun Concept
Categories: Semaphore, Articles with short description, Telegraphy, History of telecommunications, Optical communications
EN
optical telegraph  semaphore line  shutter telegraph chain  Semaphore tower  Chappe optical telegraph
EN
A system of conveying information by means of visual signals, using towers with pivoting shutters; information is encoded by the position of the mechanical elements. Open English WordNet
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EN
A system of conveying information by means of visual signals, using towers with pivoting shutters; information is encoded by the position of the mechanical elements. Open English WordNet
An optical telegraph is a line of stations, typically towers, for the purpose of conveying textual information by means of visual signals. Wikipedia
Sending visual signals with pivoting shutters in towers Wikipedia Disambiguation
System of visual communication Wikidata