2. ICAO was created in 1944 to promote the safe and orderly development of civil aviation in the world. A specialized agency of the United Nations, it sets international standards and regulations necessary for the safety, security, efficiency and regularity of air transport and serves as the medium for cooperation in all fields of civil aviation among its 187 Contracting States.

3. Presentation by Robert Witzen, Secretary of the Aeronautical Communications Panel, to the Seminar on implementation of data link and SATCOM Communications in the ICAO Regional Office for the AFI Region in Nairobi, Kenya from 17 – 19 February 2004 on the results of the ICAO 11 th AIR NAVIGATION CONFERENCE (Montreal, Canada) from 22 September to 4 October 2003 Presentation by Robert Witzen, Secretary of the Aeronautical Communications Panel, to the Seminar on implementation of data link and SATCOM Communications in the ICAO Regional Office for the AFI Region in Nairobi, Kenya from 17 – 19 February 2004 on the results of the ICAO 11 th AIR NAVIGATION CONFERENCE (Montreal, Canada) from 22 September to 4 October 2003

4. 4 11 th AIR NAVIGATION CONFERENCE 22 September – 3 October 2003 Montreal Air Traffic Management (ATM) and Communication, Navigation and Surveillance (CNS) issues Communication issues: –Agenda item 5: Review of the outcome of the ITU World Radiocommunication Conference (2003) (WRC-03) and its impact on aeronautical electromagnetic spectrum utilization –Agenda item 7: Aeronautical air-ground and air-air communications

5. 5 11 th AIR NAVIGATION CONFERENCE Agenda item 5: Review of the outcome of the ITU World Radiocommunication Conference (2003) (WRC-03) and its impact on aeronautical electromagnetic spectrum utilization Results of WRC-03 on aeronautical key items Preparation for WRC-07 Electromagnetic interference

6. 6 11 th AIR NAVIGATION CONFERENCE Agenda item 5: Review of the outcome of the ITU World Radiocommunication Conference (2003) (WRC-03) and its impact on aeronautical electromagnetic spectrum utilization Results of WRC-03 on aeronautical key items 1.MLS extension band (5091-5150 MHz) This band remained available for current or new ICAO standardized radionavigation systems 2.Radar bands (2700-2900 MHz for primary surveillance radar and 5350-5470 MHz for airborne weather radar) Sharing with radiolocation approved with special conditions to protect aeronautical radar from interference.

7. 7 11 th AIR NAVIGATION CONFERENCE Agenda item 5: Review of the outcome of the ITU World Radiocommunication Conference (2003) (WRC-03) and its impact on aeronautical electromagnetic spectrum utilization Results of WRC-03 on aeronautical key items (continued) 3.Protection of: DME (960-1215 MHz); and primary radar (1215-1300 MHz) Protection agreed from interference from Radionavigation Satellite Service (such as GPS, GLONASS, Galileo) through: 1.PFD limit for RNSS in the band 960-1215 MHz to protect DME 2.Regulatory provisions in the band 1215-1300 MHz to protect radar 4.Allocation to the Aeronautical Mobile (R) Service in the band 108-117.975 MHz Allocation limited to systems that transmit navigational information in support of air navigation and surveillance functions in accordance with recognized international aviation standards and shall not cause interference to nor claim protection from stations in the radionavigation service which operate in accordance with international aeronautical standards

8. 8 11 th AIR NAVIGATION CONFERENCE Agenda item 5: Review of the outcome of the ITU World Radiocommunication Conference (2003) (WRC-03) and its impact on aeronautical electromagnetic spectrum utilization Preparation for WRC-07 Main issues: 1.Upgrading of the radiolocation service in the band 9200-9500 MHz this band is used by aviation for ground-based and airborne weather radar 2.New allocations to the aeronautical mobile (R) service between 100 MHz and 6 GHz these are necessary to accommodate increased air-ground communications

9. 9 11 th AIR NAVIGATION CONFERENCE Agenda item 5: Review of the outcome of the ITU World Radiocommunication Conference (2003) (WRC-03) and its impact on aeronautical electromagnetic spectrum utilization Electromagnetic interference –Aeronautical sources Interference between aeronautical systems, on-board interference –Non-aeronautical sources Interference from non-aeronautical users, both on the ground and inside the aircraft –Malicious interference Intentionally generated interference with the view to disrupt air traffic

10. 10 11 th AIR NAVIGATION CONFERENCE Agenda item 7: Aeronautical air-ground and air-air communications Implementation programs The meeting received information on the status of implementation of various air-ground data links ADS-B data links The meeting addressed the progress of the development of technical elements of ADS-B data links Future of mobile communications The meeting reviewed the future evolution of current aeronautical communications

11. 11 11 th AIR NAVIGATION CONFERENCE Agenda item 7: Aeronautical air-ground and air-air communications Implementation programs Transition to VDL in Japan Transition to AMSS in Japan Data link Flight information service applications in China Implementation of HF Data link by ARINC Implementation of VDL by Arinc SITA air-com data link service FAA NEXCOM air-ground communications program FAA Capstone program Air-ground data link implementation in Europe Modernization of aeronautical communications in India Modernization of data link communications in Brazil

12. 12 11 th AIR NAVIGATION CONFERENCE Agenda item 7: Aeronautical air-ground and air-air communications ADS-B data links c omparative analysis of three ADS-B data links: Mode S extended squitter VDL Mode 4 UAT Comparison against criteria developed by ICAO Aeronautical Mobile Communications Panel, RTCA and Eurocontrol The meeting noted that -All of these data links may meet all requirements -Each of these data links had relative advantages over the others

13. 13 11 th AIR NAVIGATION CONFERENCE Agenda item 7: Aeronautical air-ground and air-air communications ADS-B implementation decisions United States – Mode S ES for air transport aircraft and UAT for general aviation Eurocontrol – Mode S ES recommended Sweden – VDL Mode 4 Australia – Mode S ES planned ASIAPAC - Mode S ES recommended Russian federation - VDL Mode 4 adopted Mongolia – VDL Mode 4 recommended for lower airspace; ES in upper airspace

14. 14 11 th AIR NAVIGATION CONFERENCE Agenda item 7: Aeronautical air-ground and air-air communications ADS-B near-term implementation strategy -Many States consider the use of Mode S ES as initial ADS-B data link -Other solutions (VDL Mode 4, UAT) may be used on regional or national basis -Recommendation 7/1 invites States to take into account to the extent possible the common element of Mode S ES as initial ADS-B data link

15. 15 11 th AIR NAVIGATION CONFERENCE Agenda item 7: Aeronautical air-ground and air-air communications ADS-B long-term implementation strategy pending development of long term ICAO operational requirements (OPLINK panel): - Mode S ES may not offer sufficient capacity to accommodate all aircraft in certain airspace - continued development of alternative ADS-B technology appropriate, including: - enhancements to already available ADS-B data links - new ADS-B data link technology

16. 16 11 th AIR NAVIGATION CONFERENCE Agenda item 7: Aeronautical air-ground and air-air communications Evolution of aeronautical mobile communications - to accommodate new functions - to provide adequate capacity and quality of services - need to increase the availability of spectrum Possible scenarios - Introduction and expansion of existing voice and data link systems already included in Annex 10 - New terrestrial and/or satellite systems operating outside the VHF band for implementation in high traffic density areas

17. 17 11 th AIR NAVIGATION CONFERENCE Agenda item 7: Aeronautical air-ground and air-air communications Development of future air-ground communication systems -Evolutionary approach (Rec. 7/3) -Future technology alternatives (Rec. 7/4) -Standardization guidelines for new aeronautical communication systems (Rec. 7/5) Further detailed information is available in the Report of the 11 th Air Navigation Conference on Agenda Item 7

18. 18 11 th AIR NAVIGATION CONFERENCE Agenda item 7: Aeronautical air-ground and air-air communications Specifics with VDL Mode 4 and/or on-board integration of new systems - review of difficulties with on-board integration of new systems, in particular with VDL Mode 4, and possibly also with VDL Mode 3 and Mode 2 - work on a solution is on-going in ICAO ACP - on-board integration of new equipment requires more attention from ICAO The Air Navigation Commission will review the report of the 11 th ANC in January 2004

19. 19