? CLASS I Candidate CSs FOM ? Class I Class II Class III Class IV GENERAL Reference CONOPS (2011) Software Assurance Level Cross Domain Information Sharing A-CDM UAV Systems Operation ? ASM Flexible Use Of Airspace Airspace Design ATFM IFPS User Manual Data Exchange Format E-ATFM (CFMU/IFPS) ATS OLDI Open ATC Architecture Model ATS Middleware (ACC-ACC only) Interoperability Of Flight Data Processing A-SMGSC (Level 1 & 2) for interop COM FOM ? Class I NAV GBAS CAT I Procedures on Use of GPS Class II Class III SURV Surveillance Data Exchange Class IV To be deleted AIS MET CLASS I Candidate CSs (started by 2006)

CLASS II Candidate CSs Class I Class II Class III Class IV GENERAL Class II ASM Class III Class IV ATFM To be deleted DL Services over ATN in Continental Airspace DL Services over FANS1/A in Continental Airspace DL Services over ACARS in Continental Airspace ATS A-SMGCS (Level 3 & higher) Arrival Management Departure Management Surveillance Performance COM European AMHS Profile Telephone for ATC purposes Voice over IP (ground only) NAV SBAS Galileo, GNSS SURV Ground-based primary radar equipment Multilateration Equipment Surveillances Services using ADS-B AIS Generic Data Process & Principles Integrity - Data Origination Integrity - Data Publication MET Systems & Procedures For the use of MET info CLASS II Candidate CSs (started in 2007)

CLASS III Candidate CSs GENERAL Reference CONOPS (2020) ATFM-CDM ASM Class I Class II ATFM Advanced Data Exchange Formats ATS Interfaces CWP / Data Processing Interfaces with Flight Data Operator Positions Interfaces with Local centre Sub-systems Flight Plan Information Subscriber Systems ATS Middleware (inter & intra ACC) COM Directory services In Support of AMHS Voice over IP (including air/ground) NAV DME ground equipment ILS ground equipment MLS GBAS CAT II/III SURV Class III Class IV AIS Aeronautical Information Exchange (AIXM) To be deleted MET CLASS III Candidate CSs (started by 2008 or later)

CLASS IV Candidate CSs Class I Class II Class III Class IV GENERAL Class I ASM Class II Class III ATFM Class IV ATS Surveillance Data Processing To be deleted COM Ground and mobile AM Stations (117.975 – 137 Mhz) HF radio equipment UHF for use by Civil ATC NAV NDB Ground equipment VOR, D-VOR ground equipment VHF Marker Beacon Ground equipment SURV Ground-based secondary radar equipment AIS CLASS IV Candidate CSs (started on demand) MET