bn:00870187n
Noun Concept
Categories: Articles with short description, History of telecommunications, Optical communications, Napoleonic beacons in England, Semaphore
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
A system of long-distance communication based on towers with moving arms Wikipedia Disambiguation
System of visual communication Wikidata