Controller–pilot datalink communications (CPDLC) is a method by which air traffic controllers can communicate with pilots over a datalink system in place of voice communication by data messages. The standard method of communication between an air traffic controller and a pilot is voice radio, using either VHF bands for line-of-sight communication or HF bands for long-distance communication.
Datalink Services Central Reporting Office (DLS-CRO) provides support to stakeholders in monitoring datalink operations and in resolving issues affecting safety, capacity, performance and interoperability at European level.
The functions of the DLS-CRO can be grouped under the following headings:
The service is restricted to specific stakeholder groups.