 Imitating the spelling of the aircraft 's name , McDonnell issued a series of patches . Pilots became " Phantom <unk> " , <unk> became " Phantom <unk> " , fans of the F @-@ 4 " Phantom <unk> " , and call it the " <unk> Phantom " . Ground crewmen who worked on the aircraft are known as " Phantom <unk> " . 
