NATO phonetic alphabet by those who exchange voice messages by radio or telephone, regardless of language differences or the quality of the communication channel. The 26 code words in the NATO phonetic alphabet are assigned to the 26 letters of the English alphabet in alphabetical order as follows: , Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, , Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu. Strict adherence to the prescribed spelling words is required in order to avoid the problems of confusion that the spelling alphabet is designed to overcome. As noted in a
NATO phonetic alphabet "To be considered, a word must: After further study and modification by each approving body, the revised alphabet was adopted on , to become effective on 1 April 1952 for civil aviation (but it may not have been adopted by any military). Problems were soon found with this list. Some users believed that they were so severe that they reverted to the old "Able Baker" alphabet. Confusion among words like "Delta" and "Extra", and between "Nectar" and "Victor", or the unintelligibility of other words during poor receiving conditions were the main problems. Later in 1952, ICAO decided to revisit the