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The Medical Signal Code [13] (incorporated in the International Code of Signals since 1930) is a means of providing assistance when medical personnel are not present. Plain language is generally preferred in such cases (presumably via radiotelephone), but the various codes provide a succinct method of communicating to a doctor the nature of the ...
English: The PDF contains 296 symbols described in the standard ISO 10628-2:2012 titled "Diagrams for the chemical and petrochemical industry — Part 2: Graphical symbols". Symbols are grouped in the same way that the standard does. Since SVG does not support multi-page formatting, individual SVG files have been uploaded.
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 significance. [2]
Like Morse code, but unlike Myer's original code, this binary code did not have a fixed length for each character. For instance, i was coded as "2", but d was coded as "222". [ 9 ] Myer's 1866 manual also includes a 3-element fixed length code using four elements, and the 1872 manual has a 3-element fixed length code using three elements.
Even though represented as strings of letters, prosigns are rendered without the intercharacter commas or pauses that would occur between the letters shown, if the representation were (mistakenly) sent as a sequence of letters: In printed material describing their meaning and use, prosigns are shown either as a sequence of dots and dashes for the sound of a telegraph, or by an overlined ...
Reference should be made to codes and standards. For example, IEC 60027, and Letter Symbols in Electrical Technology. Here are tables of widely accepted symbols. They are meant to be a guideline: Using the same symbols for the same things in different articles will increase their consistency, making them easier to understand and to improve.
Various other codes were also published, [15] but all these were eventually supplanted by the Commercial Code of Signals published by the British Board of Trade in 1857, which eventually became the International Code of Signals (ICS). A significant development was the addition of letter flags to make the code alphabetical.
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 ...