Question: 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 ?
Sentence (from "RAF radio alphabet"): Several alphabets were used, before being superseded by the adoption of the NATO/ICAO radiotelephony alphabet.
Relevant evidence: No