The planes that arrive and leave Fantasy Island never show a visible registration number on their wings or fuselages, which, under the international laws of aviation, is a legal requirement for all aircraft worldwide. For the purpose of the TV series, however, this is, of course, a deliberate "oversight", because to display such an identification would reveal an aircraft's country of origin. The geographical location of fictional "Fantasy Island" is never revealed, thereby enabling the viewer to speculate whether it may be in the Caribbean or perhaps somewhere within a Pacific island chain. In any event, sharp-eyed film viewers can always determine what country an aircraft used in the screenplay is actually registered to, and whether or not the locations portrayed in such films or TV series actually match their true location. Comprehensive lists of aircraft registration numbers can be found online.