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ICAO and global ATM system

About the key concepts of the Global Air Navigation Plan (GANP) and ICAO activities.
AUGUST, 30 / 2019 / 5 MINUTES
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It is well known that the passenger traffic growth throughout the world requires a comprehensive update of the existing global ATM system. ICAO developed the Global Air Navigation Plan — GANP to solve these and other problems.
Global air traffic doubles every 15 years, and this trend continues. Traffic density today needs the new measures to optimize and improve flight safety. The GANP is becoming one of the key elements in this work.
On the one hand, the plan contains a strategic vision and requirements, allowing participating countries to formulate their own plans and tasks for the next 15 years ahead, on the other hand, it includes concepts reflecting which technical solutions will be implemented in the near future.
GANP Priority Concepts
The first and the most important of them is the performance-based navigation (PBN) implementation. This is the ICAO term defining new specifications (RNAV, RNP) for different phases of flight. This approach assumes of the flight path close to the orthodrome without mandatory passage through ground-based radio navigation means. In some cases, only the satellite coordinates can give the points on the path. In fact, this turns a "broken" and often non-optimal flight path into a much more optimal one. It also makes approach paths' reduction and refinement at the airports possible.
The second and equally important — Continuous Climb and Descent Operations (CCO / CDO). The concept provides greater fuel economy, reduced noise emissions and CO2 emissions. New airport approach charts based on these principles have a positive impact on the environment.

Finally, the third is the optimal air traffic flows organization. This concept optimizes the movement of departing and arriving aircraft (AMAN — arrival manager, DMAN — departure manager) by planning processes automatization. We are talking about the airports' efficiency, which directly depends on the ability of ATS implement these operations correctly to ensure the required capacity.
The priority areas listed above cover the key flight phases: take-off, climb, level maintain before approach and landing. These large-scale global ATM updates make it necessary to move to the "digital sky" format, to new radio-technical flight support facilities (RTOP) generations as one of the foundations of the future ATM system. All this will allow air traffic participants to exchange the necessary information in real time.
How exactly is the GANP implemented, and what does it consist of?
The plan implies a Block Upgrades of the aviation system and is designed until 2030. It contains relevant technical roadmaps covering the communication, navigation, surveillance, information management and avionics areas. Regional features form their needs; therefore, not all modules are mandatory for countries to implement. However, part of the base units should be implemented on a global scale in the near future:
1) Service Improvement through Integration of all Digital ATM Information (B1-DATM block);
2) Creation of an aviation intranet for unhindered data exchange (B1-SWIM block) is one of the most important elements of the entire system. This will allow the applications implementation for end users and will provide the opportunity for a large-scale information exchange between various stakeholders: ATM authorities, airports, airlines, meteorology divisions, authorized private companies and government agencies;
3) Increasing the interoperability, efficiency and capacity (block B1-FICE). It will provide a more efficient ground-ground data exchange, immediately before the aircraft departure.
As noted in ICAO, these initiatives are critical to overcoming existing constraints and form the future ATM system’s basis. These and many other issues will be discussed at the 40th Anniversary ICAO Assembly, which will be held this year from September 24 to October 4 in Montreal, Canada.
Find out more about the preliminary agenda of the upcoming assembly at this link.
To summarize
We want to highlight the fact that the world does not stand still and in parallel with the global ATM system update, new relevant areas of ICAO activity are also being formed. The unmanned aviation systems traffic management can be signed out among them. As UAS shares the sky with commercial aviation and GA, all this more than ever enhances the importance of updating the global ATM system for global flight safety.
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