NAV CANADA has finalized the implementation of the Controller Pilot Data Link Communications (CPDLC) program. The program allows air traffic controllers and pilots to communicate via data link or text-based messages instead of by voice when flying aircraft above 29,000 feet.
Communication through text messages reduces communication errors compared to spoken communications over VHF or HF radio. A set of standard text messages has been developed for the most common communications to help facilitate contact with air traffic control and pilots. CPDLC messaging also helps when pilots whose first language is not English speak with air traffic control, which is especially common as many intercontinental flights cross through Canada.