CBR and PPP are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. CBR to PPP refers to a flight route from Canberra Airport to Proserpine Whitsunday Coast Airport. Hamilton Island Airport (HTI), Mackay Airport (MKY), Hayman Island Airport (HIS) are other airports near this flight route and their unique identifiers/IATA codes.