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A US Navy crewman signals the letter 'U' using flag semaphore during an underway replenishment exercise (2005). Flag semaphore (from the Ancient Greek σῆμα (sêma) 'sign' and - φέρω (-phero) '-bearer' [1]) is a semaphore system conveying information at a distance by means of visual signals with hand-held flags, rods, disks, paddles, or occasionally bare or gloved hands.
Flags of the World Comprehensive flag information. International Code of Signals For Visual, Sound and Radio Communications United States Edition, 1969 (Revised 2003) John Savard's flag page. Collection of different flag systems. Flag Signalling at Sea Nice article by Captain Barrie Kent, Royal Navy. Signal Corps Association 1860 ~ 1865
Naval flag signalling undoubtedly developed in antiquity in order to coordinate naval action of multiple vessels. In the Peloponnesian War (431 – 401 BCE) squadrons of Athenian galleys were described by Thucydides as engaging in coordinated maneuvers which would have required some kind of communication; [1] there is no record of how such communication was done but flags would have been the ...
At first it was used concurrently with the old system until 1 January 1902, and then used exclusively after 1 January 1903. In this new edition, the number of flags was increased from 18 flags plus a code pennant to 26 flags and a code pennant. The eight new flags represented the vowels A E I O U and the letters X Y Z. [2]
Then, Signalmen were identified by the symbol of two crossed semaphore flags on the left sleeve of the uniform, integrated with their rank insignia. Signalmen were responsible for transmitting, receiving, encoding, decoding, and distributing messages obtained via the visual transmission systems of flag semaphore , visual Morse code , and ...
The flag is also a symbol of exploration. It was planted on the moon during the first landing by Apollo 11 astronauts in 1969. The flag even has its own day -- each year Americans celebrate flag ...