#INTERNATIONAL TELEPHONE SPELLING ALPHABET CODE#
The same alphabetic code words are used by all agencies, but each agency chooses one of two different sets of numeric code words. Soon after the code words were developed by ICAO (see history below), they were adopted by other national and international organizations, including the ITU, the International Maritime Organization (IMO), the United States Federal Government as Federal Standard 1037C: Glossary of Telecommunications Terms and its successors ANSI T1.523-2001 and ATIS Telecom Glossary (ATIS-0100523.2019) (all three using the spellings "Alpha" and "Juliet"), the United States Department of Defense, the Federal Aviation Administration (FAA) (using the spelling "Xray"), the International Amateur Radio Union (IARU), the American Radio Relay League (ARRL), the Association of Public-Safety Communications Officials-International (APCO), and by many military organizations such as NATO (using the spelling "Xray") and the now-defunct Southeast Asia Treaty Organization (SEATO).
"Alfa" and "Juliett" are intentionally spelled as such to avoid mispronunciation NATO would do the same with "Xray". The 26 code words are as follows (ICAO spellings): Alfa, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliett, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu. The words were chosen to be accessible to speakers of English, French and Spanish.Īlthough spelling alphabets are commonly called "phonetic alphabets", they should not be confused with phonetic transcription systems such as the International Phonetic Alphabet. In 1956, NATO modified the then-current set of code words used by the International Civil Aviation Organization (ICAO) this modification then became the international standard when it was accepted by ICAO that year and by the International Telecommunication Union (ITU) a few years later. The specific code words varied, as some seemingly distinct words were found to be ineffective in real-life conditions.
#INTERNATIONAL TELEPHONE SPELLING ALPHABET SERIES#
To create the code, a series of international agencies assigned 26 code words acrophonically to the letters of the Roman alphabet, with the intention of the letters and numbers being easily distinguishable from one another over radio and telephone, regardless of language barriers and connection quality. The ITU phonetic alphabet and figure code is a rarely used variant that differs in the code words for digits.
Technically a radiotelephonic spelling alphabet, it goes by various names, including NATO spelling alphabet, ICAO phonetic alphabet and ICAO spelling alphabet. The (International) 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.
FAA radiotelephony alphabet and Morse code chart
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