Flag semaphore (from the Ancient Greek σῆμα (sêma) 'sign' and -φέρω (-phero) '-bearer') is a semaphore system conveying information at a distance by means...

transmitted over distance. A semaphore can be performed with devices including: fire, lights, flags, sunlight, and moving arms. Semaphores can be used for telegraphy...

specifically to: Flag semaphore Semaphore telegraph, a system of long-distance communication based on towers with moving arms Railway semaphore signal for railway...

maritime environment, where semaphore is used). Many flags fall into groups of similar designs called flag families. The study of flags is known as "vexillology"...

the semaphore system is flag semaphore, signalling with hand-held flags. The word semaphore was coined in 1801 by the French inventor of the semaphore line...

tactical or administrative nature.[better source needed] Flag semaphore signalling uses two flags, held in specific positions to signify letters. This method...

Signal flag Flag semaphore American manual alphabet (ASL fingerspelling) British manual alphabet (BSL fingerspelling) Braille dots-1345 Unified English...

Signal flag Flag semaphore American manual alphabet (ASL fingerspelling) British manual alphabet (BSL fingerspelling) Braille dots-13 Unified English...

rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not. Ancient signalling...

("blinker"), flag semaphore, radiotelegraphy, and radiotelephony. The International Code is the most recent evolution of a wide variety of maritime flag signalling...