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Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by law enforcement and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code.
The International Radiotelephony Spelling Alphabet or simply Radiotelephony Spelling Alphabet, commonly known as the NATO phonetic alphabet, is the most widely used set of clear-code words for communicating the letters of the Roman alphabet.
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.
International Morse code encodes the 26 basic Latin letters A to Z, one accented Latin letter ( É ), the Arabic numerals, and a small set of punctuation and procedural signals ( prosigns ). There is no distinction between upper and lower case letters. [1]
Distress signals at sea are defined in the International Regulations for Preventing Collisions at Sea and in the International Code of Signals. Mayday signals must only be used where there is grave and imminent danger to life.
The International Telecommunication Union (ITU) allocates call sign prefixes for radio and television stations of all types. They also form the basis for, but may not exactly match, aircraft registration identifiers.
An international distress frequency is a radio frequency that is designated for emergency communication by international agreement.
Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.
This table combines the ICAO international spelling alphabet and the ITU International Morse Code. The Allied military phonetic spelling alphabets prescribed the words that are used to represent each letter of the alphabet, when spelling other words out loud, letter-by-letter, and how the spelling words should be pronounced for use by the ...
List of ITU letter codes. The radiocommunication division of the International Telecommunication Union uses the following letter codes to identify its member countries. Eight countries are assigned single-letter codes ( B, D, E, F, G, I, J, S ), while the rest have codes three letters in length.