Icao Doc 9871 «GENUINE»

coordination to ensure unique identification across borders. 4. Current Challenges and Future Outlook , the focus of ICAO Working Groups has shifted toward Congestion Mitigation Cybersecurity Congestion:

The primary focus of Doc 9871 is to mitigate the risks associated with satellite geometry. icao doc 9871

| Document | Relationship to Doc 9871 | | :--- | :--- | | | Provides the regulatory SARPs. Doc 9871 provides the technical means of compliance. | | Doc 9684 (Manual on Mode S) | A training and explanatory manual. Doc 9871 is the legal specification; Doc 9684 is the tutorial. | | Doc 9750 (Global Air Navigation Plan) | Defines the operational concept (e.g., Performance-Based Surveillance). Doc 9871 defines the technical enablers. | | Doc 10007 (PANS-ATM) | Defines air traffic procedures. Doc 9871 ensures the tech supports those procedures. | coordination to ensure unique identification across borders

Unlike a ground-based beacon that sits in a field and can be physically inspected, a satellite orbits the Earth and is subject to space weather, orbital decay, and signal interference. If a satellite fails or its signal degrades, an aircraft relying on it could be put in immediate danger. | Document | Relationship to Doc 9871 |

The title of Doc 9871 mentions two specific technologies. Here is what they entail within the context of the document: