Fox is a brevity code used by NATO pilots to signal the simulated or actual release of an air-to-air munition or other combat function,  'Fox' is short for 'foxtrot', the phonetic designation for the letter 'F', which is short for 'fire', the International Radiotelephony Spelling Alphabet, commonly known as the ICAO phonetic alphabet, sometimes called ?
NATO phonetic alphabet: The International Radiotelephony Spelling Alphabet, commonly known as the ICAO phonetic alphabet, sometimes called the NATO phonetic alphabet or spelling alphabet and the ITU radiotelephonic or phonetic alphabet, is the most widely used radiotelephonic spelling alphabet.
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