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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. Information is encoded by the position of the flags; it is read when the ...
The International Code of Signals (INTERCO) is an international system of signals and codes for use by vessels to communicate important messages regarding safety of navigation and related matters. Signals can be sent by flaghoist, signal lamp ("blinker"), flag semaphore, radiotelegraphy, and radiotelephony. The International Code is the most ...
International maritime signal flags. International maritime signal flags are various flags used to communicate with ships. The principal system of flags and associated codes is the International Code of Signals. [1] Various navies have flag systems with additional flags and codes, and other flags are used in special uses, or have historical ...
Semaphore (lit. 'apparatus for signalling'; from Ancient Greek σῆμα (sêma) 'mark, sign, token' and Greek -φόρος (-phóros) 'bearer, carrier') [1] is the use of an apparatus to create a visual signal transmitted over distance. [2][3] A semaphore can be performed with devices including: fire, lights, flags, sunlight, and moving arms ...
Flag signals. Flag signals can mean any of various methods of using flags or pennants to send signals. Flags may have individual significance as signals, or two or more flags may be manipulated so that their relative positions convey symbols. Flag signals allowed communication at a distance before the invention of radio and are still used ...
An optical telegraph is a line of stations, typically towers, for the purpose of conveying textual information by means of visual signals (a form of optical communication). There are two main types of such systems; the semaphore telegraph which uses pivoted indicator arms and conveys information according to the direction the indicators point ...
Unlike semaphore flag signaling, which employed two flags, signal wig-wag required only one, using a binary code to represent each letter of the alphabet or digit. Myer was serving at Fort Duncan , Texas , in 1856 when he wrote to Secretary of War Jefferson Davis and offered his signaling system to the War Department.
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