U.S. Domestic Controller Pilot Datalink Communication Operations Handbook

This guide provides comprehensive instructions for pilots regarding the use of U.S. Domestic Controller Pilot Datalink Communication (CPDLC) services within the National Airspace System (NAS). It outlines the basic concepts of CPDLC, emphasizing the necessity for timely responses to messages sent by Air Traffic Control (ATC). The document details the procedures for logging on to CPDLC services, managing CPDLC sessions, and responding to ATC clearances and requests. It specifies that each CPDLC message requires a response, which should be conducted without undue delay. The guide also discusses the conditions under which pilots should use specific responses, such as ACCEPT/WILCO, ROGER, or REJECT/UNABLE, and highlights best practices for multi-crew operations. Additionally, it clarifies the deployment of CPDLC services, stating that only Air Route Traffic Control Centers provide these services and that they are not available in Terminal Radar Approach Control areas. The document serves as an essential resource for pilots operating in U.S. airspace who are utilizing CPDLC systems.