https://nbaa.org/news/business-aviation-insider/2021-03/flight-crews-ensure-qualify-euro-cpdlc-exemption/
May 3, 2021 - Operators should make sure their aircraft are not subject to this equipage mandate and that the exemption is noted in their ICAO flight plan forms.
flightcrewsensurequalifyeuro
https://www.aviationpros.com/aircraft-maintenance-technology/mros-repair-shops/insurance-finance/aircraft/press-release/12158362/flightsafety-international-flightsafety-adds-gulfstream-g650-cpdlc-to-its-elearning-courses-and-cpdlc-iflightdeck-application
The three-hour eLearning CPDLC scenario-based course is designed to familiarize pilots with CPDLC/ADS-C operations in normal and abnormal situations.
elearning coursesflightsafetyaddsgulfstreamcpdlc
https://txtav.com/en/journey/articles/articles/cpdlc-explained-what-cpdlc-means-for-aircraft-operators
Called Controller Pilot Data Link Communications (CPDLC), the technology aims to supplement traditional radio traffic with text-based messages.
aircraft operatorscpdlcexplainedmeans