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Edition 24 incorporates amendments effective 1 July 2026, consolidating updates up to 31 March 2026 while maintaining a structured amendment and revision history. Enquiries on content are directed to the Civil Aviation Authority’s Safety and Airspace Regulation Group, with specific military queries handled through the relevant MAA regulation contact. 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Copies of this publication may be reproduced for personal use, or for use within a company or organisation, but may not otherwise be reproduced for publication.  \nTo use or reference CAA publications for any other purpose, for example within training material for students, please contact the CAA at the address below for formal agreement.  \nFirst published September 1978 Second edition April 1984 Third edition August 1992 Fourth edition January 1994 Fifth edition January 1995 Sixth edition January 1996 Seventh edition December 1996 Eighth edition January 1998 Ninth edition January 1999 Tenth edition January 2000 Eleventh edition January 2001  \nTwelfth edition 5 February 2002 (corrected 7 February 2002) Thirteenth edition 1 October 2002  \nFourteenth edition 1 September 2003  \nFifteenth edition 1 September 2004 Sixteenth edition 1 May 2006 Seventeenth edition 21 July 2008  \nEighteenth edition 19 February 2009 (effective date 12 March 2009) Nineteenth edition 15 December 2009  \nTwentieth edition 31 March 2011  \nTwentieth edition incorporating amendments to 17 November 2011  \nTwentieth edition incorporating amendments to 12 July 2012  \nTwentieth edition incorporating amendments to 15 November 2012  \nTwentieth edition incorporating amendments to 4 April 2013 Twenty-first edition 18 July 2013  \nTwenty-first edition incorporating amendments to 14 November 2013  \nTwenty-first edition incorporating amendments to 6 March 2014  \nTwenty-first edition incorporating amendments to 24 July 2014  \nTwenty-first edition incorporating amendments to 13 November 2014  \nTwenty-first edition incorporating amendments to 28 May 2015  \nTwenty-first edition incorporating amendments to 6 November 2015 Twenty-second edition 26 May 2016 (effective date 23 June 2016)  \nTwenty-third edition Corr 8 June 2020 (effective date 17 August 2020)  \nTwenty-third edition incorporating amendments to 26 November 2020 (effective date 21 January 2021)  \nTwenty-fourth edition 30 April 2026 (effective date 1 July 2026)  \nEnquiries regarding the content of this publication should be addressed to: Future Safety, Safety and Airspace Regulation Group,  \nCivil Aviation Authority, Aviation House, Beehive Ring Road, Crawley, West Sussex, RH6 0YR.  \n[E-mail:](E-mail: ATS.Enquiries@caa.co.uk)[ ](E-mail: ATS.Enquiries@caa.co.uk)[ATS.Enquiries@caa.co.uk](E-mail: ATS.Enquiries@caa.co.uk).  \nSpecific military enquiries regarding Chapter 10 should be addressed to: MAA Regulation ATM,  \nJuniper L1 \\#5104, MOD Abbey Wood North, Bristol, BS34 8JH. Email: [DSA-MAA-Reg-ATM@mod.uk](DSA-MAA-Reg-ATM@mod.uk)  \nThe latest version of this document is available in [electronic format at www.caa.co.uk/CAP413](electronic format at www.caa.co.uk/CAP413)  \nAmendment Record  \n\n| Amendment Number | Amendment Date | Incorporated by | Incorporated on |\n| --- | --- | --- | --- |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n|  |  |  |  |\n\nList of Effective Pages  \n\n|  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- |\n| \u003Cbr>Section | \u003Cbr>Pg. | \u003Cbr>Date |  | \u003Cbr>Section | \u003Cbr>Pg. | \u003Cbr>Date |\n| Amendment\u003Cbr>Record | iii | 1 July 2026 |  | Chapter 2 | 1 | 1 July 2026 |\n|  |  |  |  | Chapter 2 | 2 | 1 July 2026 |\n| List of\u003Cbr>Effective\u003Cbr>Pages | iv | 1 July 2026 |  |  |  |  |\n|  |  |  |  | Chapter 2 | 3 | 1 July 2026 |\n|  |  |  |  | Chapter 2 | 4 | 1 July 2026 |\n| List of\u003Cbr>Effective\u003Cbr>Pages | v | 1 July 2026 |  | Chapter 2 | 5 | 1 July 2026 |\n|  |  |  |  | Chapter 2 | 6 | 1 July 2026 |\n|  |  |  |  | Chapter 2 | 7 | 1 July 2026 |","cbCaibV4wUyu0GQb","https://ap.wps.com/l/cbCaibV4wUyu0GQb","pdf",2989016,343,"English","# Amendment Record\n# List of Effective Pages\n## Contents\n## Revision History\n# Foreword","[{\"question\":\"What is the effective date for Edition 24 of CAP 413?\",\"answer\":\"Edition 24 is effective from 1 July 2026.\"},{\"question\":\"What updates are included in Edition 24?\",\"answer\":\"Edition 24 incorporates amendments up to 31 March 2026.\"},{\"question\":\"Who should be contacted for content enquiries about CAP 413?\",\"answer\":\"Content enquiries should be addressed to the Civil Aviation Authority’s Future Safety, Safety and Airspace Regulation Group.\"}]","Radiotelephony Manual - CAP 413 - Edition 24 | PDF",864]