CPDLC (Controller-Pilot Data Link Communications)

This is a Data Link Communications (DLC) application that allows pilots to provide text reports to Air Traffic Control (ATC) in lieu of verbal communication to help alleviate radio congestion. In many airspaces where CPDLC is supported, the preference is for pilots to use CPDLC to send reports to ATC and to receive clearances, with high-frequency radio used as a backup. Aircraft operating in the North Atlantic (NAT) Region betweenFL290and FL 410will be required to be equippedand authorized forCPDLC by January 2020.