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Annex 11. Edition 15
Last modified:11/27/2025
Air Traffic Services
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Air Traffic Control ServiceFlight Information ServiceAlerting ServiceAir Traffic Control ServiceFlight Information ServiceAlerting ServiceINTERNATIONAL CIVIL AVIATION ORGANIZATIONAnnex 11Practices, see Foreword.For information regarding the applicability of the Standards and Recommended This edition supersedes, on 8 November 2018, all previous editions of Annex 11.Fifteenth Edition, July 2018to the Convention on International Civil AviationAir Traffic ServicesInternational Standardsand Recommended Practices
Air Traffic Control ServiceFlight Information ServiceAlerting ServiceAir Traffic Control ServiceFlight Information ServiceAlerting ServiceINTERNATIONAL CIVIL AVIATION ORGANIZATIONAnnex 11Practices, see Foreword.For information regarding the applicability of the Standards and Recommended This edition supersedes, on 8 November 2018, all previous editions of Annex 11.Fifteenth Edition, July 2018to the Convention on International Civil AviationAir Traffic ServicesInternational Standardsand Recommended Practices
Published in separate English, Arabic, Chinese, French, Russian and Spanish editions by the INTERNATIONAL CIVIL AVIATION ORGANIZATION 999 Robert-Bourassa Boulevard, Montral, Quebec, Canada H3C 5H7 For ordering information and for a complete listing of sales agents and booksellers, please go to the ICAO website at www.icao.int First Edition, 1950 Fourteenth Edition, 2016 Fifteenth Edition, 2018 Annex 11 Air Traffic Services Order Number AN 11 ISBN 978-92-9265-086-5 print version ISBN 978-92-9275-705-2 electronic version ICAO 2018 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, without prior permission in writing from the International Civil Aviation Organization.
iii AMENDMENTS Amendments are announced in the supplements to the Products and Services Catalogue the Catalogue and its supplements are available on the ICAO website at www.icao.int. The space below is provided to keep a record of such amendments. RECORD OF AMENDMENTS AND CORRIGENDA AMENDMENTS CORRIGENDA No. Date applicable Date entered Entered by No. Date of issue Date entered Entered by 151 Incorporated in this edition 52 5/11/20 ICAO 53 28/11/24 ICAO 54 27/11/25 ICAO
ANNEX 11 v 8/11/18 TABLE OF CONTENTS Page FOREWORD ....................................................................................................................................................... ix CHAPTER 1. Definitions ................................................................................................................................. 1-1 CHAPTER 2. General ...................................................................................................................................... 2-1 2.1 Establishment of authority .................................................................................................................. 2-1 2.2 Objectives of the air traffic services ................................................................................................... 2-2 2.3 Divisions of the air traffic services ..................................................................................................... 2-2 2.4 Determination of the need for air traffic services ............................................................................... 2-3 2.5 Designation of the portions of the airspace and controlled aerodromes where air traffic services will be provided .......................................................................................... 2-3 2.6 Classification of airspaces .................................................................................................................. 2-4 2.7 Performance-based navigation PBN operations ............................................................................... 2-5 2.8 Performance-based communication PBC operations ....................................................................... 2-5 2.9 Performance-based surveillance PBS operations ............................................................................. 2-5 2.10 Establishment and designation of the units providing air traffic services ........................................... 2-6 2.11 Specifications for flight information regions, control areas and control zones ................................... 2-6 2.12 Identification of air traffic services units and airspaces ...................................................................... 2-8 2.13 Establishment and identification of ATS routes ................................................................................. 2-8 2.14 Establishment of change-over points .................................................................................................. 2-9 2.15 Establishment and identification of significant points ........................................................................ 2-9 2.16 Establishment and identification of standard routes for taxiing aircraft ............................................. 2-9 2.17 Coordination between the operator and air traffic services ................................................................ 2-10 2.18 Coordination between military authorities and air traffic services ..................................................... 2-10 2.19 Coordination of activities potentially hazardous to civil aircraft ........................................................ 2-10 2.20 Aeronautical data ................................................................................................................................ 2-11 2.21 Coordination between meteorological service provider and appropriate air traffic services authority ... 2-12 2.22 Coordination between aeronautical information services and appropriate air traffic services authorities .. 2-12 2.23 Minimum flight altitudes .................................................................................................................... 2-13 2.24 Service to aircraft in the event of an emergency ................................................................................. 2-13 2.25 In-flight contingencies ........................................................................................................................ 2-14 2.26 Time in air traffic services .................................................................................................................. 2-16 2.27 Establishment of requirements for carriage and operation of pressure-altitude reporting transponders ........................................................................................................................ 2-16 2.28 Fatigue management .......................................................................................................................... 2-16 2.29 Safety management ............................................................................................................................. 2-18 2.30 Common reference systems ................................................................................................................ 2-18 2.31 Language proficiency ......................................................................................................................... 2-18 2.32 Contingency arrangements ................................................................................................................. 2-19 2.33 Identification and delineation of prohibited, restricted and danger areas ........................................... 2-19 2.34 Instrument flight procedure design service ......................................................................................... 2-19 27/11/25 No. 54
Annex 11 Air Traffic Services Table of Contents Page 8/11/18 vi CHAPTER 3. Air traffic control service ......................................................................................................... 3-1 3.1 Application ......................................................................................................................................... 3-1 3.2 Provision of air traffic control service ................................................................................................ 3-1 3.3 Operation of air traffic control service................................................................................................ 3-1 3.4 Separation minima .............................................................................................................................. 3-3 3.5 Responsibility for control ................................................................................................................... 3-4 3.6 Transfer of responsibility for control .................................................................................................. 3-4 3.7 Air traffic control clearances .............................................................................................................. 3-6 3.8 Control of persons and vehicles at aerodromes .................................................................................. 3-9 3.9 Provision of radar and ADS-B ............................................................................................................ 3-10 3.10 Use of surface movement radar SMR .............................................................................................. 3-10 CHAPTER 4. Flight information service ........................................................................................................ 4-1 4.1 Application ......................................................................................................................................... 4-1 4.2 Scope of flight information service .................................................................................................... 4-1 4.3 Operational flight information service broadcasts .............................................................................. 4-2 4.4 VOLMET broadcasts and D-VOLMET service ................................................................................. 4-10 CHAPTER 5. Alerting service ......................................................................................................................... 5-1 5.1 Application ......................................................................................................................................... 5-1 5.2 Notification of rescue coordination centres ........................................................................................ 5-1 5.3 Use of communication facilities ......................................................................................................... 5-3 5.4 Plotting aircraft in a state of emergency ............................................................................................. 5-3 5.5 Information to the operator ................................................................................................................. 5-3 5.6 Information to aircraft operating in the vicinity of an aircraft in a state of emergency ...................... 5-4 CHAPTER 6. Air traffic services requirements for communications .......................................................... 6-1 6.1 Aeronautical mobile service air-ground communications ................................................................ 6-1 6.2 Aeronautical fixed service ground-ground communications............................................................ 6-2 6.3 Surface movement control service ...................................................................................................... 6-6 6.4 Aeronautical radio navigation service ................................................................................................ 6-6 CHAPTER 7. Air traffic services requirements for information ................................................................. 7-1 7.1 Meteorological information ................................................................................................................ 7-1 7.2 Information on aerodrome conditions and the operational status of associated facilities ................... 7-3 7.3 Information on the operational status of navigation services .............................................................. 7-3 7.4 Information on unmanned free balloons ............................................................................................. 7-4 7.5 Information concerning volcanic activity ........................................................................................... 7-4 7.6 Information concerning radioactive materials and toxic chemical clouds ...................................... 7-4 5/11/20 No. 52
Table of Contents Annex 11 Air Traffic Services Page vii 8/11/18 APPENDICES APPENDIX 1. Principles governing the identification of navigation specifications and the identification of ATS routes other than standard departure and arrival routes .............................. APP 1-1 1. Designators for ATS routes and navigation specifications ...................................................................... APP 1-1 2. Composition of designator ...................................................................................................................... APP 1-2 3. Assignment of basic designators ............................................................................................................. APP 1-3 4. Use of designators in communications .................................................................................................... APP 1-3 APPENDIX 2. Principles governing the establishment and identification of significant points ................ APP 2-1 1. Establishment of significant points .......................................................................................................... APP 2-1 2. Designators for significant points marked by the site of a radio navigation aid ...................................... APP 2-1 3. Designators for significant points not marked by the site of a radio navigation aid ................................ APP 2-2 4. Use of designators in communications .................................................................................................... APP 2-3 5. Significant points used for reporting purposes ........................................................................................ APP 2-3 APPENDIX 3. Principles governing the identification of standard departure and arrival routes and associated procedures ....................................................................................................................... APP 3-1 1. Designators for standard departure and arrival routes and associated procedures ................................... APP 3-1 2. Composition of designators ..................................................................................................................... APP 3-2 3. Assignment of designators ...................................................................................................................... APP 3-2 4. Assignment of validity indicators ............................................................................................................ APP 3-3 5. Examples of plain language and coded designators ................................................................................ APP 3-3 6. Composition of designators for MLS/RNAV approach procedures ........................................................ APP 3-4 7. Use of designators in communications .................................................................................................... APP 3-5 8. Display of routes and procedures to air traffic control ............................................................................ APP 3-5 APPENDIX 4. ATS airspace classes services provided and flight requirements ................................... APP 4-1 APPENDIX 5. Prescriptive fatigue management regulations ...................................................................... APP 5-1 APPENDIX 6. Fatigue risk management system FRMS requirements ................................................... APP 6-1 1. FRMS policy and documentation ............................................................................................................ APP 6-1 2. Fatigue risk management processes......................................................................................................... APP 6-2 3. FRMS safety assurance processes ........................................................................................................... APP 6-4 4. FRMS promotion processes .................................................................................................................... APP 6-4 APPENDIX 7. State responsibilities concerning an instrument flight procedure design service .............. APP 7-1 ATTACHMENTS ATTACHMENT A. Material relating to a method of establishing ATS routes defined by VOR ............. ATT A-1 1. Introduction ............................................................................................................................................. ATT A-1 2. Determination of VOR system performance values ................................................................................ ATT A-1 3. Determination of protected airspace along VOR-defined routes ............................................................. ATT A-1 5/11/20 No. 52
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Table Of Contents
COVER PAGE
FOREWORD
CHAPTER 1. DEFINITIONS
CHAPTER 2. GENERAL
2.1 Establishment of authority
2.3 Divisions of the air traffic services
2.2 Objectives of the air traffic services
2.5 Designation of the portions of the airspace and controlled aerodromes where air traffic services will be provided
2.4 Determination of the need for air traffic services
2.6 Classification of airspaces
2.8 Performance-based communication (PBC) operations
2.7 Performance-based navigation (PBN) operations
2.9 Performance-based surveillance (PBS) operations
2.10 ESTABLISHMENT AND DESIGNATION OF THE UNITS PROVIDING AIR TRAFFIC SERVICES
2.11 Specifications for flight information regions, control areas and control zones
2.12 Identification of air traffic services units and airspaces
2.13 Establishment and identification of ATS routes
2.15 Establishment and identification of significant points
2.14 Establishment of change-over points
2.16 Establishment and identification of standard routes for taxiing aircraft
2.17 Coordination between the operator and air traffic services
2.18 Coordination between military authorities and air traffic services
2.19 Coordination of activities potentially hazardous to civil aircraft
2.22 Coordination between aeronautical information services and appropriate air traffic services authorities
2.20 Aeronautical data
2.21 Coordination between meteorological service provider and appropriate air traffic services authority
2.23 MINIMUM FLIGHT ALTITUDES
2.24 Service to aircraft in the event of an emergency
2.25 In-flight contingencies
2.26 Time in air traffic services
2.27 Establishment of requirements for carriage and operation of pressure-altitude reporting transponders
2.28 Fatigue management
2.29 SAFETY MANAGEMENT
2.30 COMMON REFERENCE SYSTEMS
2.33 IDENTIFICATION AND DELINEATION OF PROHIBITED, RESTRICTED AND DANGER AREAS
2.31 LANGUAGE PROFICIENCY
2.32 CONTINGENCY ARRANGEMENTS
2.34 INSTRUMENT FLIGHT PROCEDURE DESIGN SERVICE
3.2 Provision of air traffic control service
CHAPTER 3. AIR TRAFFIC CONTROL SERVICE
3.1 Application
3.3 Operation of air traffic control service
3.4 Separation minima
3.6 Transfer of responsibility for control
3.5 Responsibility for control
3.7 Air traffic control clearances
3.8 Control of persons and vehicles at aerodromes
3.9 Provision of radar and ADS-B
3.10 Use of surface movement radar (SMR)
CHAPTER 4. FLIGHT INFORMATION SERVICE
4.1 Application
4.2 Scope of flight information service
4.3 Operational flight information service broadcasts
4.4 VOLMET broadcasts and D-VOLMET service
5.2 Notification of rescue coordination centres
CHAPTER 5. ALERTING SERVICE
5.1 Application
5.3 Use of communication facilities
5.4 Plotting aircraft in a state of emergency
5.5 Information to the operator
5.6 Information to aircraft operating in the vicinity of an aircraft in a state of emergency
CHAPTER 6. AIR TRAFFIC SERVICES REQUIREMENTS FOR COMMUNICATIONS
6.1 Aeronautical mobile service (air-ground communications)
6.2 Aeronautical fixed service (ground-ground communications)
6.3 Surface movement control service
6.4 Aeronautical radio navigation service
CHAPTER 7. AIR TRAFFIC SERVICES REQUIREMENTS FOR INFORMATION
7.1 Meteorological information
7.2 Information on aerodrome conditions and the operational status of associated facilities
7.3 Information on the operational status of navigation services
7.4 Information on unmanned free balloons
7.5 Information concerning volcanic activity
7.6 Information concerning radioactive materials and toxic chemical “clouds”
ATTACHMENT A. MATERIAL RELATING TO A METHOD OF ESTABLISHING ATS ROUTES DEFINED BY VOR
1. INTRODUCTION
2. DETERMINATION OF VOR SYSTEM PERFORMANCE VALUES
3. DETERMINATION OF PROTECTED AIRSPACE ALONG VOR-DEFINED ROUTES
5. SPACING OF ADJACENT VOR-DEFINED ROUTES THAT ARE NOT PARALLEL
6. CHANGE-OVER POINTS FOR VORS
7. CALCULATION OF RADIUS OF TURN
ATTACHMENT B. TRAFFIC INFORMATION BROADCASTS BY AIRCRAFT (TIBA) AND RELATED OPERATING PROCEDURES
1. INTRODUCTION AND APPLICABILITY OF BROADCASTS
2. DETAILS OF BROADCASTS
3. RELATED OPERATING PROCEDURES
ATTACHMENT C. MATERIAL RELATING TO CONTINGENCY PLANNING
1. INTRODUCTION
2. STATUS OF CONTINGENCY PLANS
3. RESPONSIBILITY FOR DEVELOPING, PROMULGATING AND IMPLEMENTING CONTINGENCY PLANS
4. PREPARATORY ACTION
5. COORDINATION
6. DEVELOPMENT, PROMULGATION AND APPLICATION OF CONTINGENCY PLANS