nˈoʊ. twˈɛnti wˈʌn sˈɪɾi ʌv mˈɛlbɚn skwˈɑːdɹən ɹˈɑːf ɪz ɐ ɹˈɔɪəl ɔːstɹˈeɪliən ˈɛɹ fˈoːɹs ɹˈɑːf dʒˈɛnɚɹəl ɹɪzˈɜːv skwˈɑːdɹən.
No. 21 (City of Melbourne) Squadron RAAF is a Royal Australian Air Force (RAAF) general reserve squadron.