This session will consider the role of data link communications (CPDLC, ADS-C and AIDC) in current and future ATM operations. The session will address the experience and plans of using data links in varying ranges (just as a complementary means to HF voice communication to as an essential tool to realize trajectory-based operations). The session will also provide hands-on guidance for planning and implementation of data link services, using specific sections of the Global Operational Data Link Manual (GOLD, 10037), and the newly developed global AIDC manual.