Semaphore (disambiguation)

Semaphore is the use of an apparatus with telegraphy to create a visual signal transmitted over long-distances. It may refer specifically to:

  • Flag semaphore
  • Semaphore telegraph, a system of long-distance communication based on towers with moving arms
  • Railway semaphore signal for railway traffic control
  • Traffic semaphore, another name for automotive traffic lights based on their early resemblance to railway semaphores
  • Turning semaphore or trafficators, retractable arms to indicate turns on automobiles from the 1920s to 1950s

Other

See also

  • International maritime signal flags, one system of flag signals representing individual letters of the alphabet in signals to or from ships
  • Telegraphy, the long-distance transmission of written messages without physical transport of written letters
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