CPDLC is also being used in Anchorage, Tokyo and Tahiti FIRs, and on L888, the Western China route which skirts around the Tibetan plateau to give a more direct route from the Far East to Europe, avoiding the joys of the "South-of-Himalayas" airspace. QANTAS may still be the only airline using L888.
NAT CPDLC trials are planned for this year to supplement the ADS waypoint position reporting operational trials currently running in Gander, Shanwick, Reykjavik and Santa Maria FIRs.
FANS-1 or FANS-A is required for CPDLC; satcom is also useful if you want datalink comms in oceanic airspace
Freq SLF