FAQ n.115362

If the aircraft has ATN VDL Mode 2 CPDLC capability and the crew are appropriately trained, the operator should enter the J1 designator in item 10 of the flight plan in accordance with the provisions of the ICAO PANS-ATM (ICAO Doc 4444 ‘Procedures for Air Navigation Services (PANS-ATM)’, Sixteen Edition 2016), as transposed by the Commission Regulation (EC) No 1033/2006 on ‘requirements on procedures for flight plans in the pre-flight phase for the single European sky’.