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Easy Access Rules for Airborne Communications, Navigation and Surveillance (CS-ACNS)

Issue 4
19 May 2022
Last updated date
19 May 2022
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Easy Access Rules for Airborne Communications, Navigation and Surveillance (CS-ACNS)

Issue 4

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Table of contents

  • Disclaimer
  • Note from the editor
  • Certification specification
  • Acceptable means of compliance
  • Guidance material
  • Incorporated amendments
  • Preamble
  • Subpart A — General
    • CS ACNS.A.GEN.001 Applicability
      • GM1 ACNS.A.GEN.001 Applicability
    • CS ACNS.A.GEN.005 Definitions
    • CS ACNS.A.GEN.010 Instructions for continued airworthiness
      • AMC1 ACNS.A.GEN.010 Instructions for Continued Airworthiness
    • CS ACNS.A.GEN.015 Aircraft documentation
      • AMC1 ACNS.A.GEN.015(a) Aircraft documentation
    • CS ACNS.A.GEN.020 Deviation from equipment standards
  • Subpart B — Communications (COM)
    • Section 1 – Voice Channel Spacing (VCS)
      • General
        • CS ACNS.B.VCS.001 Applicability
          • GM1 ACNS.B.VCS.001 Applicability
      • System functional requirements
        • CS ACNS.B.VCS.010  Voice Communication System
          • AMC1 ACNS.B.VCS.010 Voice Communication Systems
      • System performance requirements
        • CS ACNS.B.VCS.020 Performance requirements
        • CS ACNS.B.VCS.025  Integrity
        • CS ACNS.B.VCS.030  Continuity
          • AMC1 ACNS.B.VCS.030 Continuity
          • GM1 ACNS.B.VCS.030 Continuity
      • Installation requirements
        • CS ACNS.B.VCS.040  Flight Deck Interface
          • AMC1 ACNS.B.VCS.040 Flight Deck Interface
    • Section 2 – Data Link Services (DLS)
      • General
        • CS ACNS.B.DLS.B1.001  Applicability
          • GM1 ACNS.B.DLS.B1.001 Applicability
        • CS ACNS.B.DLS.B1.005 Installation Requirements
          • GM1 ACNS.B.DLS.B1.005 Data Link System Installation
      • Flight deck control and indication capabilities
        • CS ACNS.B.DLS.B1.010 Flight Deck Interface
          • AMC1 ACNS.B.DLS.B1.010 Flight deck interface
        • CS ACNS.B.DLS.B1.015 Dual Data Link Capabilities (Dual stack)
          • AMC1.ACNS.B.DLS.B1.015 Dual Data Link Capabilities (Dual stack)
      • ATN B1 data link
        • CS ACNS.B.DLS.B1.020 Data Link Services
          • AMC1 ACNS.B.DLS.B1.020 Data Link Services
          • GM1 ACNS.B.DLS.B1.020 Data link services
        • CS ACNS.B.DLS.B1.025 Protection mechanism
          • AMC1 ACNS.B.DLS.B1.025 Protection mechanism
          • AMC2 ACNS.B.DLS.B1.025 Protection mechanism
          • AMC3 ACNS.B.DLS.B1.025 Protection mechanism
          • GM1 ACNS.B.DLS.B1.025 Protection mechanism
          • GM2 ACNS.B.DLS.B1.025 Protection mechanism
          • GM3 ACNS.B.DLS.B1.025 Protection mechanism
      • System performance requirements
        • CS ACNS.B.DLS.B1.030 Integrity
        • CS ACNS.B.DLS.B1.035 DLS system continuity
          • AMC1 ACNS.B.DLS.B1.035 DLS system continuity
          • GM1 ACNS.B.DLS.B1.035 DLS system continuity
      • Time
        • CS ACNS.B.DLS.B1.040 Universal Time Coordinated (UTC)
          • AMC1 ACNS.B.DLS.B1.040 Universal Time Coordinated (UTC)
      • Data link initiation capability (DLIC) service messages
        • CS ACNS.B.DLS.B1.050 DLIC Uplink Messages
          • AMC1 ACNS.B.DLS.B1.050 DLIC Uplink Messages
        • CS ACNS.B.DLS.B1.055 DLIC Downlink Messages
          • AMC1 ACNS.B.DLS.B1.055 DLIC Downlink Messages
        • CS ACNS.B.DLS.B1.060 DLIC initiation when in ‘CPDLC inhibited’ state (uplink)
      • CPDLC Messages
        • CS ACNS.B.DLS.B1.070 CPDLC uplink messages
          • AMC1 ACNS.B.DLS.B1.070 CPDLC uplink messages
          • GM1 ACNS.B.DLS.B1.070 Uplink Messages
          • GM2 ACNS.B.DLS.B1.070 Uplink Messages
        • CS ACNS.B.DLS.B1.075 CPDLC downlink messages
          • AMC1 ACNS.B.DLS.B1.075 Downlink messages
          • GM1 ACNS.B.DLS.B1.075 Downlink messages
          • GM2 ACNS.B.DLS.B1.075 Downlink Messages
          • GM3 ACNS.B.DLS.B1.075 Optional ACL Downlink Messages
      • Data link services requirements
        • CS ACNS.B.DLS.B1.080 Data link initiation capability (DLIC) service
          • AMC1 ACNS.B.DLS.B1.080 Data Link Initiation Capability (DLIC) Service
          • GM1 ACNS.B.DLS.B1.080 Data Link Initiation Capability (DLIC) Service
        • CS ACNS.B.DLS.B1.085 ATC communications management (ACM) service
          • AMC1 ACNS.B.DLS.B1.085 ATC Communications Management (ACM) Service
          • GM1 ACNS.B.DLS.B1.085 ATC Communications Management (ACM) Service
        • CS ACNS.B.DLS.B1.090 ACL service safety requirements
          • AMC1 ACNS.B.DLS.B1.090 ATC Clearances and Information (ACL) Service
          • GM1 ACNS.B.DLS.B1.090 ATC Clearances and Information (ACL) Service
        • CS ACNS.B.DLS.B1.095 ATC microphone check (AMC) service
      • Interoperability Requirements
        • CS ACNS.B.DLS.B1.100 Network Layer Requirements
          • AMC1 ACNS.B.DLS.B1.100 Network Layer Requirements
          • GM1 ACNS.B.DLS.B1.100 Network Layer Requirements
        • CS ACNS.B.DLS.B1.105 Transport Layer Protocol Requirements
          • AMC1 ACNS.B.DLS.B1.105 Transport Layer Requirements
          • GM1 ACNS.B.DLS.B1.105 Transport Layer Requirements
        • CS ACNS.B.DLS.B1.110 Session Layer Requirement
          • AMC1 ACNS.B.DLS.B1.110 Session Layer Requirement
        • CS ACNS.B.DLS.B1.115 Presentation layer requirements
          • AMC1 ACNS.B.DLS.B1.115 Presentation Layer Requirement
        • CS ACNS.B.DLS.B1.120 Application Layer Requirements
          • AMC1 ACNS.B.DLS.B1.120 Application Layer Requirements
          • GM1 ACNS.B.DLS.B1.120 Application Layer Requirements
        • CS ACNS.B.DLS.B1.125 Database
    • Appendices
      • Appendix A – Background information on voice communication systems
      • Appendix B – Background information on data link systems
  • Subpart C — Navigation (NAV)
    • SECTION 1 – PERFORMANCE-BASED NAVIGATION (PBN)
      • Subsection 1 – Applicability – General
        • CS ACNS.C.PBN.101 Applicability
          • AMC1 ACNS.C.PBN.101 Applicability
          • GM1 ACNS.C.PBN.101 Applicability
          • GM2 ACNS.C.PBN.101 Applicability
      • Subsection 2 – Generic specifications for performance-based lateral navigation
        • APPLICABILITY
          • CS ACNS.C.PBN.201 Applicability
        • SYSTEM QUALIFICATION CRITERIA
          • CS ACNS.C.PBN.205 RNP system approval
            • AMC1 ACNS.C.PBN.205 RNP system approval
            • AMC2 ACNS.C.PBN.205 RNP system approval
            • AMC3 ACNS.C.PBN.205 RNP system approval
            • GM1 ACNS.C.PBN.205 RNP system approval
            • GM2 ACNS.C.PBN.205 RNP system approval
            • GM3 ACNS.C.PBN.205 RNP system approval
          • CS ACNS.C.PBN.210 Position source
            • AMC1 ACNS.C.PBN.210 Position source
        • FUNCTIONAL CRITERIA
          • RNP system
            • CS ACNS.C.PBN.215 Position estimation
              • AMC1 ACNS.C.PBN.215 Position estimation
              • GM1 ACNS.C.PBN.215 Position estimation
            • CS ACNS.C.PBN.220 Navigation source selection and reversion
              • AMC1 ACNS.C.PBN.220 Navigation source selection and reversion
            • CS ACNS.C.PBN.225 Reasonableness check of distance-measuring equipment (DME)
              • AMC1 ACNS.C.PBN.225 Reasonableness check of distance-measuring equipment (DME)
            • CS ACNS.C.PBN.230 Flight plan management
              • AMC1 ACNS.C.PBN.230 Flight plan management
            • CS ACNS.C.PBN.235 Automatic leg sequencing
              • AMC1 ACNS.C.PBN.235 Automatic leg sequencing
            • CS ACNS.C.PBN.240 Route/procedure extraction and loading
              • AMC1 ACNS.C.PBN.240 Route/procedure extraction and loading
            • CS ACNS.C.PBN.245 Path definition and leg transition
              • AMC1 ACNS.C.PBN.245 Path definition and leg transition
              • GM1 ACNS.C.PBN.245 Path definition and leg transition
            • CS ACNS.C.PBN.250 ‘Direct-to’ function
              • AMC1 ACNS.C.PBN.250 ‘Direct-to’ function
            • CS ACNS.C.PBN.255 Magnetic variation
              • AMC1 ACNS.C.PBN.255 Magnetic variation
            • CS ACNS.C.PBN.260 RNAV holding
              • AMC1 ACNS.C.PBN.260 RNAV holding
              • GM1 ACNS.C.PBN.260 RNAV holding
            • CS ACNS.C.PBN.265 User-defined routes and fixes
              • AMC1 ACNS.C.PBN.265 User-defined routes and fixes
              • GM1 ACNS.C.PBN.265 User-defined routes and fixes
            • CS ACNS.C.PBN.270 Navigation accuracy
              • AMC1 ACNS.C.PBN.270 Navigation accuracy
          • Display of navigation data
            • CS ACNS.C.PBN.275 Display and entry of navigation data — resolution
              • AMC1 ACNS.C.PBN.275 Display and entry of navigation data — resolution
            • CS ACNS.C.PBN.280 Deviation display
              • AMC1 ACNS.C.PBN.280 Deviation display
              • AMC2 ACNS.C.PBN.280 Deviation display
              • AMC3 ACNS.C.PBN.280 Deviation display
            • CS ACNS.C.PBN.285 Display of active waypoint
              • AMC1 ACNS.C.PBN.285 Display of active waypoint
              • AMC2 ACNS.C.PBN.285 Display of active waypoint
            • CS ACNS.C.PBN.290 Display of ground speed
              • AMC1 ACNS.C.PBN.290 Display of ground speed
            • CS ACNS.C.PBN.2105 Display of speed constraints
              • AMC1 ACNS.C.PBN.2105 Display of speed constraints
            • CS ACNS.C.PBN.2110 Display of navigation aid frequencies and/or identifiers
          • Navigation database
            • CS ACNS.C.PBN.2115 Use of navigation database
              • AMC1 ACNS.C.PBN.2115 Use of navigation database
              • GM1 ACNS.C.PBN.2115 Use of navigation database
            • CS ACNS.C.PBN.2120 Data quality requirements (DQRs)
              • AMC1 ACNS.C.PBN.2120 Data quality requirements (DQRs)
            • CS ACNS.C.PBN.2125 Extraction and display of navigation data
              • AMC1 ACNS.C.PBN.2125 Extraction and display of navigation data
              • GM1 ACNS.C.PBN.2125 Extraction and display of navigation data
          • Monitoring and alerting
            • CS ACNS.C.PBN.2130 Alerting associated with degradation of navigation
              • AMC1 ACNS.C.PBN.2130 Alerting associated with degradation of navigation
            • CS ACNS.C.PBN.2135 Navigation accuracy alerting
              • AMC1 ACNS.C.PBN.2135 Navigation accuracy alerting
        • PERFORMANCE CRITERIA
          • Lateral performance
            • CS ACNS.C.PBN.2140 Lateral navigation accuracy
              • AMC1 ACNS.C.PBN.2140 Lateral navigation accuracy
            • CS ACNS.C.PBN.2145 RNP system design — integrity
              • AMC1 ACNS.C.PBN.2145 RNP system design — integrity
            • CS ACNS.C.PBN.2150 RNP system design — continuity
              • AMC1 ACNS.C.PBN.2150 RNP system design — continuity
      • Subsection 3 – Supplementary specifications for lateral navigation in final approach
        • APPLICABILITY
          • CS ACNS.C.PBN.301 Applicability
            • GM1 ACNS.C.PBN.301 Applicability
        • SUPPLEMENTARY FUNCTIONAL CRITERIA
          • RNP system
            • CS ACNS.C.PBN.305 RNP system approval
              • AMC 1 ACNS.C.PBN.305 RNP system approval
            • CS ACNS.C.PBN.310 Final approach intercept
              • AMC1 ACNS.C.PBN.310 Final approach intercept
              • GM1 ACNS.C.PBN.310 Final approach intercept
          • Display of navigation data
            • CS ACNS.C.PBN.320 Approach mode indication
              • GM1 ACNS.C.PBN.320 Approach mode indication
            • CS ACNS.C.PBN.325  Lateral deviation display
              • AMC1 ACNS.C.PBN.325 Lateral deviation display
            • CS ACNS.C.PBN.330 Non-numeric lateral deviation display scaling for approach
              • AMC1 ACNS.C.PBN.330 Non-numeric lateral deviation display scaling for approach
            • CS ACNS.C.PBN.335 Display of distance to threshold
      • Subsection 4 – Supplementary specifications for vertical navigation
        • APPLICABILITY
          • CS ACNS.C.PBN.401 Applicability
            • GM1 ACNS.C.PBN.401 Applicability
        • SUPPLEMENTARY FUNCTIONAL CRITERIA
          • RNP system
            • CS ACNS.C.PBN.405 Vertical path
            • CS ACNS.C.PBN.410 Altitude constraints
              • AMC1 ACNS.C.PBN.410 Altitude constraints
            • CS ACNS.C.PBN.420 Pressure settings
              • GM1 ACNS.C.PBN.420 Pressure settings
      • Subsection 5 – Supplementary specifications for vertical navigation in final approach
        • APPLICABILITY
          • CS ACNS.C.PBN.501 Applicability
            • GM1 ACNS.C.PBN.501 Applicability
        • SUPPLEMENTARY FUNCTIONAL CRITERIA
          • RNP system
            • CS ACNS.C.PBN.505 Vertical approach path
              • AMC 1 ACNS.C.PBN.505 Vertical approach path
            • CS ACNS.C.PBN.515 Pressure settings
              • GM1 ACNS.C.PBN.515 Pressure settings
            • CS ACNS.C.PBN.520 Glide path intercept
              • AMC1 ACNS.C.PBN.520 Glide path intercept
            • CS ACNS.C.PBN.525 Temperature compensation
              • AMC1 ACNS.C.PBN.525 Temperature compensation
          • Display of navigation data
            • CS ACNS.C.PBN.530 Vertical deviation display
              • AMC1 ACNS.C.PBN.530 Vertical deviation display
              • AMC2 ACNS.C.PBN.530 Vertical deviation display
            • CS ACNS.C.PBN.535 Resolution and full-scale deflection of the vertical deviation display
              • AMC1 ACNS.C.PBN.535 Resolution and full-scale deflection of the vertical deviation display
              • GM1 ACNS.C.PBN.535 Resolution and full-scale deflection of the vertical deviation display
            • CS ACNS.C.PBN.540 Barometric altitude
            • CS ACNS.C.PBN.545 Active approach mode display
          • Monitoring and alerting
            • CS ACNS.C.PBN.550 Glide path alerting
              • AMC1 ACNS.C.PBN.550 Glide path alerting
        • SUPPLEMENTARY PERFORMANCE CRITERIA
          • Vertical performance
            • CS ACNS.C.PBN.555 Vertical accuracy when using barometric VNAV
              • AMC1 ACNS.C.PBN.555 Vertical accuracy when using barometric VNAV
            • CS ACNS.C.PBN.560 Vertical accuracy when using SBAS/GNSS geometric altitude sources
              • AMC1 ACNS.C.PBN.560 Vertical accuracy when using SBAS/GNSS geometric altitude sources
              • GM1 ACNS.C.PBN.560 Vertical accuracy when using SBAS/GNSS geometric altitude sources
            • CS ACNS.C.PBN.565 Transitions
              • AMC 1 ACNS.C.PBN.565 Transitions
            • CS ACNS.C.PBN.570 Advisory VNAV
              • AMC1 ACNS.C.PBN.570 Advisory VNAV
              • GM1 ACNS.C.PBN.570 Advisory VNAV
            • CS ACNS.C.PBN.575 RNP system design — integrity in final approach
              • AMC1 ACNS.C.PBN.575 RNP system design — integrity in final approach
            • CS ACNS.C.PBN.580 RNP system design — continuity
              • AMC1 ACNS.C.PBN.580 RNP system design — continuity
      • Subsection 6 – Supplementary specifications for RNP authorisation required (RNP AR)
        • APPLICABILITY
          • CS ACNS.C.PBN.601 Applicability
            • AMC1 ACNS.C.PBN.601 Applicability
            • GM1 ACNS.C.PBN.601 Applicability
        • SUPPLEMENTARY SYSTEM QUALIFICATION
          • CS ACNS.C.PBN.605 System performance demonstration
            • AMC1 ACNS.C.PBN.605 System performance demonstration
            • GM1 ACNS.C.PBN.605 System performance demonstration
          • CS ACNS.C.PBN.610 Source of horizontal position
            • AMC1 ACNS.C.PBN.610 Source of horizontal position
            • GM1 ACNS.C.PBN.610 Source of horizontal position
        • SUPPLEMENTARY FUNCTIONAL CRITERIA
          • RNP system
            • CS ACNS.C.PBN.615 Autopilot/Flight director
            • CS ACNS.C.PBN.620 Reversion
              • GM1 ACNS.C.PBN.620 Reversion
            • CS ACNS.C.PBN.625 Go-around and missed approach
              • GM1 ACNS.C.PBN.625 Go-around and missed approach
            • CS ACNS.C.PBN.630 Radius to fix (RF) leg transition
              • AMC1 ACNS.C.PBN.630 Radius to fix (RF) leg transition
            • CS ACNS.C.PBN.635 Navigation accuracy for RNP AR operations
              • AMC1 ACNS.C.PBN.635 Navigation accuracy for RNP AR operations
            • CS ACNS.C.PBN.640 RNP AR departures – Functional Requirements
              • AMC1 ACNS.C.PBN.640 RNP AR departures
              • GM1 ACNS.C.PBN.640 RNP AR departures
            • CS ACNS.C.PBN.645 RNP AR departures – Take off performance Data
          • Display of navigation data
            • CS ACNS.C.PBN.650 Display of aircraft track
            • CS ACNS.C.PBN.655 Lateral deviation display
              • AMC1 ACNS.C.PBN.655 Lateral deviation display
          • Navigation database
            • CS ACNS.C.PBN.660 Use of a navigation database
              • AMC1 ACNS.C.PBN.660 Use of a navigation database
          • Vertical performance
            • CS ACNS.C.PBN.670 Vertical accuracy
              • AMC1 ACNS.C.PBN.670 Vertical accuracy
              • AMC2 ACNS.C.PBN.670 Vertical accuracy
        • SUPPLEMENTARY PERFORMANCE CRITERIA
          • CS ACNS.C.PBN.675 RNP system design – RNP AR integrity
            • AMC1 ACNS.C.PBN.675 RNP system design — RNP AR integrity
            • GM1 ACNS.C.PBN.675 RNP system design – RNP AR integrity
          • CS ACNS.C.PBN.680 RNP system design – RNP AR continuity
            • AMC1 ACNS.C.PBN.680 RNP system design — RNP AR continuity
            • GM1 ACNS.C.PBN.680 RNP system design – RNP AR continuity
      • Subsection 7 – Supplementary specifications for applications for advanced RNP (A-RNP)
        • APPLICABILITY
          • CS ACNS.C.PBN.701 Applicability
        • SUPPLEMENTARY FUNCTIONAL CRITERIA
          • RNP system
            • CS ACNS.C.PBN.705 Radius to Fix
            • CS ACNS.C.PBN.710 Parallel offset
            • CS ACNS.C.PBN.715 RNP scalability
              • AMC1 ACNS.C.PBN.715 RNP scalability
          • Display of navigation data
            • CS ACNS.C.PBN.725 Display of aircraft track
      • Subsection 8 – Supplementary specifications supporting radius to fix (RF)
        • APPLICABILITY
          • CS ACNS.C.PBN.801 Applicability
        • SUPPLEMENTARY FUNCTIONAL CRITERIA
          • RNP system
            • CS ACNS.C.PBN.805 RF functional requirements
              • AMC1 ACNS.C.PBN.805 RF functional requirements
              • GM1 ACNS.C.PBN.805 RF functional requirements
            • CS ACNS.C.PBN.810 RNP failure
            • CS ACNS.C.PBN.815 Autopilot/Flight director
              • AMC1 ACNS.C.PBN.815 Autopilot/Flight director
          • Display of navigation data
            • CS ACNS.C.PBN.820 Display of computed path
      • Subsection 9 – Supplementary specifications supporting fixed radius transition (FRT)
        • APPLICABILITY
          • CS ACNS.C.PBN.901 Applicability
        • SUPPLEMENTARY FUNCTIONAL CRITERIA
          • RNP system
            • CS ACNS.C.PBN.905 Fixed radius transition (FRT) requirements
              • AMC1 ACNS.C.PBN.905 Fixed radius transition (FRT) requirements
              • GM1 ACNS.C.PBN.905 Fixed radius transition (FRT) requirements
          • Display of navigation data
            • CS ACNS.C.PBN.910 Display of the computed path
      • Subsection 10 – Supplementary specifications supporting parallel offset
        • APPLICABILITY
          • CS ACNS.C.PBN.1001 Applicability
        • SUPPLEMENTARY FUNCTIONAL CRITERIA
          • RNP system
            • CS ACNS.C.PBN.1005 Parallel offset capabilities
              • AMC1 ACNS.C.PBN.1005 Parallel offset capabilities
          • Display of navigation data
            • CS ACNS.C.PBN.1010 Indication of parallel offset status
    • Appendix A — Guidance on classification of Failure Conditions.
    • Appendix B — INS/IRU standard performance and functionality
    • Appendix C — Installation and testing guidance
    • Appendix D — RF leg demonstration templates
  • Subpart D — Surveillance (SUR)
    • Section 1 – Mode A/C only surveillance
      • General
        • CS ACNS.D.AC.001 Applicability
          • GM1 ACNS.D.AC.001 Applicability
      • System Functional Requirements
        • CS ACNS.D.AC.010 Transponder characteristics
          • AMC1 ACNS.D.AC.010 Transponder characteristics
        • CS ACNS.D.AC.015 Data transmission
          • AMC1 ACNS.D.AC.015 Data transmission
        • CS ACNS.D.AC.020 Altitude source
          • AMC1 ACNS.D.AC.020 Altitude source
        • CS ACNS.D.AC.025 Flight deck interface
          • AMC1 ACNS.D.AC.025 Flight deck interface
      • System Performance Requirements
        • CS ACNS.D.AC.030 Integrity
        • CS ACNS.D.AC.035 Continuity
      • Installation Requirements
        • CS ACNS.D.AC.040 Dual/multiple transponder installation
          • AMC1 ACNS.D.AC.040 Dual/multiple transponder installation
        • CS ACNS.D.AC.045 Antenna installation
          • AMC1 ACNS.D.AC.045 Antenna Installation
    • Section 2 – Mode S elementary surveillance
      • General
        • CS ACNS.D.ELS.001 Applicability
          • AMC1 ACNS.D.ELS.001 Applicability
      • System Functional Requirements
        • CS ACNS.D.ELS.010 Transponder characteristics
          • AMC1 ACNS.D.ELS.010 Transponder characteristics
        • CS ACNS.D.ELS.015 Data transmission
          • AMC1 ACNS.D.ELS.015 Data transmission
        • CS ACNS.D.ELS.020 On-the-ground status determination
          • AMC1 ACNS.D.ELS.020 On-the-ground status determination
        • CS ACNS.D.ELS.025 Altitude source
          • AMC1 ACNS.D.ELS.025 Altitude source
        • CS ACNS.D.ELS.030 Flight deck interface
          • AMC1 ACNS.D.ELS.030 Flight deck interface
      • System Performance Requirements
        • CS ACNS.D.ELS.040 Integrity
        • CS ACNS.D.ELS.045 Continuity
          • AMC1 ACNS.D.ELS.045 Continuity
      • Installation requirements
        • CS ACNS.D.ELS.050 Dual/multiple transponder installation
          • AMC1 ACNS.D.ELS.050 Dual/multiple transponder installation
        • CS ACNS.D.ELS.055 ICAO 24-bit Aircraft address
        • CS ACNS.D.ELS.060 Antenna installation
          • AMC1 ACNS.D.ELS.060 Antenna Installation
        • CS ACNS.D.ELS.065 Antenna diversity
          • AMC1 ACNS.D.ELS.065 Antenna Diversity
    • Section 3 – Mode S Enhanced Surveillance
      • General
        • CS ACNS.D.EHS.001 Applicability
          • AMC1 ACNS.D.EHS.001 Applicability
      • System Functional Requirements
        • CS ACNS.D.EHS.010 Transponder characteristics
          • AMC1 ACNS.D.EHS.010 Transponder characteristics
        • CS ACNS.D.EHS.015 Data transmission
          • AMC1 ACNS.D.EHS.015 Data transmission
      • System Performance Requirements
        • CS ACNS.D.EHS.020 Integrity
        • CS ACNS.D.EHS.025 Continuity
    • Section 4 – 1090 MHz Extended Squitter ADS-B
      • General
        • CS ACNS.D.ADSB.001 Applicability
          • GM1 ACNS.D.ADSB.001 Applicability
      • System Functional Requirements
        • CS ACNS.D.ADSB.010 ADS-B Out system approval
          • AMC1 ACNS.D.ADSB.010 ADS-B Out system approval
      • ADS-B Out Data
        • CS ACNS.D.ADSB.020 ADS-B Out Data Parameters
          • AMC1 ACNS.D.ADSB.020(a-b) ADS-B Out data parameters
        • CS ACNS.D.ADSB.025 Provision of data
          • AMC1 ACNS.D.ADSB.025(a) Provision of data — Approved sources
          • AMC1 ACNS.D.ADSB.025(c) Provision of data – Data quality indication and associated data
      • ADS-B Transmit Unit
        • CS ACNS.D.ADSB.030 ADS-B Transmit Unit Approval
          • AMC1 ACNS.D.ADSB.030 ADS-B Transmit unit installation
        • CS ACNS.D.ADSB.035 ICAO 24-bit Aircraft address
        • CS ACNS.D.ADSB.040 Antenna diversity
          • AMC1 ACNS.D.ADSB.040 Antenna Diversity
        • CS ACNS.D.ADSB.045 Antenna installation
        • CS ACNS.D.ADSB.050 Transmit power
        • CS ACNS.D.ADSB.055 Simultaneous operation of ADS-B transmit units
          • AMC1 ACNS.D.ADSB.055 Simultaneous operation of ADS-B transmit units
        • CS ACNS.D.ADSB.060 On-the-ground status determination
          • AMC1 ACNS.D.ADSB.060 On-the-ground status Determination
      • Horizontal Position and Velocity Data Sources
        • CS ACNS.D.ADSB.070 Horizontal Position and Velocity Data Sources
          • AMC1 ACNS.D.ADSB.070 Horizontal Position and Velocity Data Sources
      • Other Data Sources
        • CS ACNS.D.ADSB.080 Data Sources as defined by Mode S Elementary and Enhanced Surveillance
          • AMC1 ACNS.D.ADSB.080 Data sources as defined by Mode S elementary and enhanced surveillance
        • CS ACNS.D.ADSB.085 Geometric Altitude
          • AMC1 ACNS.D.ADSB.085 Geometric Altitude
      • Flight Deck Control and Indication Capabilities
        • CS ACNS.D.ADSB.090 Flight deck interface
          • AMC1 ACNS.D.ADSB.090(a) Flight deck interface
          • AMC1 ACNS.D.ADSB.090(b) Flight Deck Interface
      • System Performance Requirements
        • CS ACNS.D.ADSB.100 Integrity
        • CS ACNS.D.ADSB.105 Continuity
          • AMC1 ACNS.D.ADSB.105 Continuity
      • Horizontal Position and Velocity Data Refresh Rate and Latency
        • CS ACNS.D.ADSB.110 Horizontal position and velocity data refresh rate
          • AMC1 ACNS.D.ADSB.110 Horizontal Position and Velocity Data Refresh
        • CS ACNS.D.ADSB.115 Horizontal Position and Velocity Total Latency
        • CS ACNS.D.ADSB.120 Horizontal Position Uncompensated Latency
          • AMC1 ACNS.D.ADSB.115 and 120 Horizontal Position and Velocity Total and Uncompensated Latency
    • Appendices
      • Appendix A – Background information on Mode A/C surveillance systems
      • Appendix B – Background information on Mode S ELS
      • Appendix C – Background information on Mode S EHS
      • Appendix D – Differences between CS ACNS.D.ELS and JAA TGL 13 Rev1
      • Appendix E – Differences between CS ACNS.D.EHS and EASA AMC 20-13
      • Appendix F – Example of Flight Manual Supplement for ELS/EHS
      • Appendix G – Example of Flight Manual Supplement for ADS-B out
      • Appendix H – Guidance on 1090-MHz extended squitter ADS-B Out
      • Appendix I – On-the-ground status Test and Validation Guidance for Aeroplanes
      • Appendix J – Comparison between EASA CS ACNS.D.ADSB and FAA AC 20-165A Requirements
  • Subpart E — Others
    • Section 1 – Terrain Awareness and Warning System (TAWS)
      • General
        • CS ACNS.E.TAWS.001 Applicability
          • GM1 ACNS.E.TAWS.001 Applicability
        • CS ACNS.E.TAWS.005 TAWS Equipment Approval
          • AMC1 ACNS.E.TAWS.005 TAWS equipment approval
      • System functional requirements
        • CS ACNS.E.TAWS.010 Required Functions and Interfaces
          • AMC1 ACNS.E.TAWS.010 Required functions
          • AMC2 ACNS.E.TAWS.010 Required functions
        • CS ACNS.E.TAWS.015 FLTA function requirements
          • AMC1 ACNS.E.TAWS.015 FLTA function requirements
        • CS ACNS.E.TAWS.020 PDA function requirements
          • GM1 ACNS.E.TAWS.020 PDA function requirements
        • CS ACNS.E.TAWS.025 Class A TAWS inhibition
          • AMC1 ACNS.E.TAWS.025 Class A TAWS inhibition
        • CS ACNS.E.TAWS.030 Terrain information display
          • AMC1 ACNS.E.TAWS.030 Terrain information display
        • CS ACNS.E.TAWS.035 Aural and visual alerts
          • AMC1 ACNS.E.TAWS.035 Aural and visual alerts
      • System performance requirements
        • CS ACNS.E.TAWS.040 Integrity
          • AMC1 ACNS.E.TAWS.040 Integrity
        • CS ACNS.E.TAWS.045 Continuity
          • AMC1 ACNS.E.TAWS.045 Continuity
          • GM1 ACNS.E.TAWS.045 Continuity
        • CS ACNS.E.TAWS.050 GPWS
        • CS ACNS.E.TAWS.055 Terrain and airport information
          • AMC1 ACNS.E.TAWS.055 Terrain and airport information
        • CS ACNS.E.TAWS.060 Positioning information
          • AMC1 ACNS.E.TAWS.060 Positioning information
      • Installation requirements
        • CS ACNS.E.TAWS.070 Failure mode
        • CS ACNS.E.TAWS.075 Prioritisation scheme
          • AMC1 ACNS.E.TAWS.075 Prioritisation schemes
        • CS ACNS.E.TAWS.080 Pop-up mode
          • AMC1 ACNS.E.TAWS.080 Pop-up mode
      • Appendices
        • Appendix A – TAWS installations testing guidance material
        • Appendix B – Example of an acceptable TAWS installation
        • Appendix C – Background information on terrain awareness and warning systems (TAWSs)
    • Section 2 – Reduced Vertical Separation Minimum (RVSM)
      • General
        • CS ACNS.E.RVSM.001 Applicability
          • AMC1 ACNS.E.RVSM.001 Applicability
        • CS ACNS.E.RVSM.005 RVSM system
          • AMC1 ACNS.E.RVSM.005 RVSM system
      • System functional requirements
        • CS ACNS.E.RVSM.010 Required functions
          • AMC1 ACNS.E.RVSM.010 Required functions
      • System performance requirements
        • CS ACNS.E.RVSM.020 Integrity
        • CS ACNS.E.RVSM.025 Continuity
        • CS ACNS.E.RVSM.030 RVSM system performance
          • AMC1 ACNS.E.RVSM.030 RVSM system performance requirement
        • CS ACNS.E.RVSM.035 Altimetry system accuracy
          • AMC1 ACNS.E.RVSM.035 Altimetry system accuracy
          • GM1 ACNS.E.RVSM.035 Altimetry System Accuracy
      • Appendices
        • APPENDIX A – ALTIMETRY SYSTEM ERROR COMPONENTS
        • Appendix B – Examples of methods to establish and monitor static‑source errors (group aircraft only)
    • Section 3 – Location of an Aircraft in Distress
      • General
        • CS ACNS.E.LAD.001 Applicability and scope
          • GM1 ACNS.E.LAD.001 Applicability and scope
        • CS ACNS.E.LAD.010 Definitions
          • GM1 ACNS.E.LAD.010 Definitions
        • CS ACNS.E.LAD.020 System approval
          • AMC1 ACNS.E.LAD.020 System approval
          • AMC2 ACNS.E.LAD.020 System approval
          • AMC3 ACNS.E.LAD.020 System approval
      • Transmission
        • CS ACNS.E.LAD.110 Transmission of the activation signals
          • AMC1 ACNS.E.LAD.110 Transmission of the activation signals
          • AMC2 ACNS.E.LAD.110 Transmission of the activation signals
          • AMC3 ACNS.E.LAD.110 Transmission of the activation signals
          • GM1 ACNS.E.LAD.110 Transmission of the activation signals
        • CS ACNS.E.LAD.120 Repeated transmission of the activation signals
          • AMC1 ACNS.E.LAD.120 Repeated transmission of the activation signals
        • CS ACNS.E.LAD.130 Transmission of the deactivation signals
          • AMC1 ACNS.E.LAD.130 Transmission of the deactivation signals
        • CS ACNS.E.LAD.140 Activation signals — essential information
          • AMC1 ACNS.E.LAD.140 Activation signals — essential information
          • GM1 ACNS.E.LAD.140 Activation signals — essential information
        • CS ACNS.E.LAD.150 Activation signals — supplementary
          • GM1 ACNS.E.LAD.150 Activation signals — supplementary
        • CS ACNS.E.LAD.160 Deactivation signals — essential information
        • CS ACNS.E.LAD.170 Transmission of a homing signal
          • AMC1 ACNS.E.LAD.170 Transmission of a homing signal
          • GM1 ACNS.E.LAD.170 Transmission of a homing signal
      • Operation, activation and deactivation
        • CS ACNS.E.LAD.210 Normal operation
          • AMC1 ACNS.E.LAD.210 Normal operation
          • AMC2 ACNS.E.LAD.210 Normal operation
          • GM1 ACNS.E.LAD.210 Normal operation
          • GM2 ACNS.E.LAD.210 Normal operation
        • CS ACNS.E.LAD.230 Continued operation after losing normal electrical power
          • GM1 ACNS.E.LAD.230 Continued operation after losing normal electrical power
          • GM2 ACNS.E.LAD.230 Continued operation after losing normal electrical power
        • CS ACNS.E.LAD.240 Automatic activation
          • AMC1 ACNS.E.LAD.240 Automatic activation
          • AMC2 ACNS.E.LAD.240 Automatic activation
          • GM1 ACNS.E.LAD.240 Automatic activation
          • GM2 ACNS.E.LAD.240 Automatic activation
        • CS ACNS.E.LAD.250 Manual activation
          • AMC1 ACNS.E.LAD.250 Manual activation
          • GM1 ACNS.E.LAD.250 Manual activation
        • CS ACNS.E.LAD.260 Automatic deactivation
          • GM1 ACNS.E.LAD.260 Automatic deactivation
        • CS ACNS.E.LAD.270 Manual deactivation
        • CS ACNS.E.LAD.280 Indications to the flight crew and self‑monitoring
          • AMC1 ACNS.E.LAD.280 Indications to the flight crew and self‑monitoring
          • GM1 ACNS.E.LAD.280 Indications to the flight crew and self‑monitoring
        • CS ACNS.E.LAD.290 Means to analyse automatic activation
          • AMC1 ACNS.E.LAD.290 Means to analyse automatic activation
      • Robustness
        • CS ACNS.E.LAD.310 Environmental and crash conditions encountered during accidents
          • AMC1 ACNS.E.LAD.310 Environmental and crash conditions encountered during accidents
          • AMC2 ACNS.E.LAD.310 Environmental and crash conditions encountered during accidents
          • AMC3 ACNS.E.LAD.310 Environmental and crash conditions encountered during accidents
          • AMC4 ACNS.E.LAD.310 Environmental and crash conditions encountered during accidents
          • GM1 ACNS.E.LAD.310 Environmental and crash conditions encountered during accidents
        • CS ACNS.E.LAD.320 Flight dynamics and locating the aircraft
          • AMC1 ACNS.E.LAD.320 Flight dynamics and locating the aircraft
          • AMC2 ACNS.E.LAD.320 Flight dynamics and locating the aircraft
          • AMC3 ACNS.E.LAD.320 Flight dynamics and locating the aircraft
          • GM1 ACNS.E.LAD.320 Flight dynamics and locating the aircraft
        • CS ACNS.E.LAD.340 Activation and transmission over water and over land
          • AMC1 ACNS.E.LAD.340 Activation and transmission over water and over land
        • CS ACNS.E.LAD.350 Means and procedures to prevent undesirable activation
          • AMC1 ACNS.E.LAD.350 Means and procedures to prevent undesirable activation
          • GM1 ACNS.E.LAD.350 Means and procedures to prevent undesirable activation
        • CS ACNS.E.LAD.360 Shared airborne resources and transmission means
          • GM1 ACNS.E.LAD.360 Shared airborne resources and transmission means
      • Accuracy
        • CS ACNS.E.LAD.410 Position accuracy for non-survivable accidents
          • AMC1 ACNS.E.LAD.410 Position accuracy for non-survivable accidents
          • AMC2 ACNS.E.LAD.410 Position accuracy for non-survivable accidents
          • GM1 ACNS.E.LAD.410 Position accuracy for non-survivable accidents
        • CS ACNS.E.LAD.420 Position accuracy for survivable accidents
          • AMC1 ACNS.E.LAD.420 Position accuracy for survivable accidents
      • Interoperability
        • CS ACNS.E.LAD.520 Frequency spectrum
          • AMC1 ACNS.E.LAD.520 Frequency spectrum
      • System performance
        • CS ACNS.E.LAD.610 Continuity
          • AMC1 ACNS.E.LAD.610 Continuity
          • GM1 ACNS.E.LAD.610 Continuity
        • CS ACNS.E.LAD.620 Integrity
          • AMC1 ACNS.E.LAD.620 Integrity
          • GM1 ACNS.E.LAD.620 Integrity
        • CS ACNS.E.LAD.650 Risk for third parties
          • AMC1 ACNS.E.LAD.650 Risk for third parties
      • Appendices
        • Appendix A — Example flight trajectory

Subpart D — Surveillance (SUR)

Section 1 – Mode A/C only surveillance

System Performance Requirements

CS ACNS.D.AC.030 Integrity

ED Decision 2013/031/R

The Mode A/C only airborne surveillance system integrity is designed commensurate with a ‘minor’ failure condition .

CS ACNS.D.AC.035 Continuity

ED Decision 2013/031/R

The Mode A/C airborne surveillance system continuity is designed to an allowable qualitative probability of ‘probable’.

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