Air Traffic Control

CAA SkyWise on Air Traffic Control


Flight Information Service Officer Manual (CAP 797)
Supplementary Instruction (SI) 2020/06 to CAP 797 was published on 28 July 2020, effective 3 December 2020.
A review of wake turbulence arrangements at AFIS aerodromes identified opportunities to reduce complexity and improve the quality of the guidance. This SI details changes made to the CAP 797 relating to warnings of wake turbulence provided by aerodrome FISOs.
Dated: July 2020

CAP 413 Radiotelephony Manual
Supplementary Instruction (SI) 02/2020 to CAP 413 Radiotelephony Manual ED 23 (Corr) was published on 14 July 2020, effective 10 September 2020.
The advent of performance-based navigation (PBN) is having a major impact on all aspects of the aviation industry, with PBN routes and procedures being introduced more widely. As part of a continuing effort to streamline inconsistencies resulting from the emergence of PBN, ICAO has introduced measures to align the procedure approach chart identification with the designation of the navigation specification.
Specifically, ICAO intends to transition from the area navigation (RNAV) global navigation satellite system (GNSS) Runway XX naming convention, to RNP Runway XX. The UK’s plan to adopt this naming convention is described within AIC Y 140/2019. The purpose of this SI to the Radiotelephony Manual (CAP 413) is to introduce the revised nomenclature and phraseology for PBN instrument approach procedures.
Dated: July 2020

Policy for ATS Provision within Controlled Airspace by Units not Notified as the Controlling Authority
The CAA publishes airspace policy statements on a variety of topics; one of these details requirements and provides guidance regarding the approval of air traffic services (ATS) units (ATSUs) seeking to provide ATS within controlled airspace (CAS), where such units are not notified as the controlling authority for such airspace.
The CAA’s triennial review of this airspace policy statement has resulted in a number of minor editorial amendments which include the replacement of references to Reg (EU) No 1034/2011 and 1035/2011, with reference to Reg (EU) No 2017/373 the ‘ATM/ANS IR’, following the former’s repeal.
The revised airspace policy statement can be found here.
Dated: July 2020

Manual of Air Traffic Services Part 1 (CAP 493) Edition 8
The Manual of Air Traffic Services (MATS) Part 1 (CAP 493) has been published as Edition 8, which will become effective on 31 July 2020.
Dated: June 2020

Flight Information Service Officer Manual (CAP 797)
Supplementary Instruction (SI) 2020/03 to CAP 797 was published on 9 June 2020 and will become effective on 8 July 2020.
This SI details changes made to the Flight Information Service Officer Manual (CAP 797) Edition 3, to update Chapter 21 Aeronautical Information Service and Appendix D Directory.
Dated: June 2020

Corrected issue of CAP 413
Stakeholder feedback concerning Edition 23 of CAP 413 Radiotelephony Manual has highlighted the need to address a number of issues.
As a result CAP 413 ED 23 will be withdrawn on 8 June 2020 and replaced with a corrected edition, ED 23 Corr, to take effect 17 August 2020.
Dated: June 2020

Radiotelephony Manual: New edition now published
The Radiotelephony Manual (CAP 413) has been updated. Edition 23 includes updates to: Foreword; Definitions; Military Callsigns and numerous editorial changes. It has been published today and has an effective date of 8 June 2020.
Dated: April 2020

Guidance on Sailplane Operations
Three Supplementary Instructions (SI) have been published to incorporate guidance material concerning sailplane operations into the Manual of Air Traffic Services (MATS) Part 1 (CAP 493) and the Flight Information Service Officer (FISO) Manual (CAP 797). Associated radiotelephony procedures are incorporated into the Radiotelephony Manual (CAP 413).
CAP493 SI 2020-02
CAP797 SI 2020-02
CAP413 SI 2020-01
Dated: April 2020

Standardised European Rules of the Air Update
The CAA has updated its consolidation of Regulation (EU) 923/2012, supporting EASA Acceptable Means of Compliance and Guidance Material, The Rules of the Air Regulations 2015, supporting CAA Permissions and Exemptions plus related elements of the Air Navigation Order 2016.
These updates can be found at and reflect the imminent expiry of the UK’s General Exemption from aspects of the Class D airspace VMC.
The consolidation also reflects changes to several other General Exemptions to reflect this expiry.
Dated: March 2020

Expiry of ORS4 General Exemption No. 1312 – 25 March 2020
Air traffic service providers are reminded that Official Record Series (ORS) 4 General Exemption No. 1312 will expire at 2359 UTC on 25 March 2020.
From 26 March 2020, reference to the Exemption will be removed from the Manual of Air Traffic Services (MATS) Part 1 (CAP 493), and the requirements of SERA.5001 Table S5-1 and SERA.5005(a) will apply without variation.
To review the Supplementary Instruction (SI).
Dated: March 2020

Expiry of SERA exemption covering VFR flights in Class D airspace
A Supplementary Instruction (SI) has been published to remind air traffic service providers that Official Record Series (ORS) 4 General Exemption No. 1312 is planned to expire at 2359 UTC on 25 March 2020.
From 26 March 2020 the requirements of SERA.5001 Table S5-1 and SERA.5005(a) will apply without variation and reference to ORS4 No 1312 is removed from the Manual of Air Traffic Services (MATS) Part 1 (CAP 493).
Dated: February 2020


CAP 797 Flight information service officer manual
A review of Royal Flight procedures by the CAA has resulted in a requirement to make subsequent amendments to the Flight Information Service Officer Manual (CAP 797). Whilst the change is relatively minor, ATS personnel should note that the procedure concerning Selected Helicopter Flights and the requirement for the diversion of Royal aircraft of No 32 (The Royal) Squadron to be authorised by the Distress and Diversion (D&D) Cell have been withdrawn.
Supplementary Instruction (SI) 2020/01 to CAP 797 Flight Information Service Officer (FISO) Manual Edition 3 was published on 23 January 2020, effective 26 March 2020.
Dated: January 2020

Amendment to Royal Flights procedure and the withdrawal of the Selected Helicopter Flights procedure – MATS Pt 1 (CAP 493) SI 2019/08
The purpose of this Supplementary Instruction (SI) to the Manual of Air Traffic Services (MATS) Part 1 (CAP 493) is to introduce changes to the Royal Flights procedure and to notify the withdrawal of the Selected Helicopter Flights procedure.
Dated: January 2020

Class E airspace ATS procedures amendment – phase 2 – version 2
MATS Pt 1 (CAP493) Supplementary Instruction (SI) 2019/06 implement phase 2 changes to Class E Airspace ATS procedures. This SI has been updated to include several additional amendments and is reissued as version 2.
Dated: January 2020

Update to Annex IV Part-ATS Human Factors Requirements for ATC Providers
The CAA has reviewed CAP 670 Air Traffic Services Safety Requirements Part D Human Resources.
While these requirements are the responsibility of service providers to comply with, the CAA has determined that if measures in place satisfy CAP 670 Part D, these will be regarded as being compliant with the regulation.
The CAA will provide further guidance to organisations regarding Alternative Means of Compliance (AltMoC).
Dated: December 2020

Class E airspace ATS procedures amendment
The purpose of this Supplementary Instruction (SI) is to implement changes to radiotelephony phraseology contained within UK Radiotelephony Manual (CAP 413).
This is in support of amendments to class E airspace Air Traffic Service (ATS) procedure changes contained within the Manual of Air Traffic Services (MATS) Part 1 (CAP 493).
Dated: October 2019

Class E airspace ATS procedures amendment – phase 2
The purpose of Supplementary Instruction (SI) 2019/06 is to implement phase 2 changes to Class E Airspace ATS procedures contained within the to the Manual of Air Traffic Services (MATS) Part 1 (CAP 493).
Dated: October 2019

Air Traffic Safety Electronics Personnel Training & Competence Requirements
CAP 1649 has been published and can be downloaded from the CAA website.
This document aims to help Air Navigation Service Providers interpret Regulation (EU) 2017/373 Annex XIII Part-PERS pertaining to ATSEP training and competence assessments, including specific United Kingdom recommendations and United Kingdom requirements for limited certificate holder ANSPs.
Details and requirements for existing Air Traffic Engineers transitioning to the new ATSEP processes can be found on the following page under the Part-PERS sub-section.
Dated: October 2019

Preventing airspace infringements around the Manchester low-level route
The second in a series of narratives focusing on identified infringement ‘hot-spots’ in the UK has been published on the Airspace & Safety Initiative website.
This infringement update has been written by members of the Northwest Local Airspace Infringement Team (LAIT): NATS Manchester; ATCSL, Liverpool; Barton Aerodrome; and Ravenair, Liverpool Airport.
Dated: October 2019

Identification requirement for ATS licensing applications
This notification updates and replaces the information sent on 4 May 2018 as SW2018/76
Applicants for the Radio Operator’s Certificate of Competence (ROCC), are required to provide proof of identity (ID), when making their initial application. The provided documentation must be certified by an approved UK CAA Authorised Examiner, or an official body such as a UK post office or UK solicitor/notary.
The only identification documentation that will be accepted is a valid passport or photo driving licence, both must be certified as per above.
Dated: August 2019

Policy for the approval of Remote Aerodrome Air Traffic Services (ATS)
The CAA has published an initial update of its Policy concerning the approval of remote tower operations which revises a number of definitions and some technical content to align with the content of EASA ED 2019/004/R.
Dated: July 2019

Policy for the Establishment of Visual Reference Points (VRPs)
The CAA has published policy and guidance regarding the establishment and use of VRPs, and the process to be followed when establishing or disestablishing them. It replaces Aeronautical Information Circular Y 006/2013 dated 21 February 2013.
VRPs are to be established in accordance with the CAA’s Airspace Change Process (CAP 1616). VRPs are categorized as Level 0 airspace changes, so sponsors should follow the Level 0 process and provide the required VRP-specific information in their DAP1916 submissions.
Dated: July 2019

Small UAS flights below 400 ft will no longer be notified
Following recent updates to the Air Navigation Order for small Unmanned Aircraft Systems (SUAS) we have reviewed the process for the notification of SUAS flights.
Subsequently we will no longer issue NOTAM for SUAS flights below 400ft AGL. This decision follows engagement with key stakeholders and the use of risk analysis tools and safety data. It does not affect
– the requirements for UAS operators to follow the NATS NSF and ENSF process.
– the ability for aerodromes to promulgate NOTAM’s within their associated areas should they deem necessary.
Any SUAS operators with exemptions to operate higher than 400ft AGL will be required to inform the CAA, Airspace Regulation, to enable NOTAM to be published.
Pilots are reminded to remain vigilant whilst operating both inside and outside the London and City CTR due to the increase in UAS operations.
Dated: June 2019

Skyway Code: New edition now available
Our guide to private flying rules, regulations and best practice has been updated. Version 2 is now online, with printed copies available to buy direct from aviation supplier AFE.
Condensing the must know information on UK GA flying into easy to navigate information and graphics, The SkyWay Code gives GA pilots a one stop shop for safety rules and advice.
Dated: June 2019

UK Airprox Board monthly review – April 2019
The UK Airprox Board (UKAB) has published its latest monthly review which focuses in detail on one particular airprox incident, to ensure that lessons can be learnt by pilots and air traffic controllers for the benefit of air safety in the future.
Dated: May 2019

ATCO licence grace period
Do you need to revalidate or renew your ATCO licence, ratings or endorsements?
Regulation 2015/340 states that the CAA MAY allow the privileges of a licence to be exercised for a period of eight weeks after successful completion of the applicable examination(s) and assessment(s), pending the issue of the licence, rating or endorsement. This is to allow the CAA to process licence applications.
If a valid licence is not received within 10 working days of the acknowledgement of their application, and this is preventing the applicant exercising the privileges of their licence, the applicant MUST contact their CAA Inspector ATS (Operations) to request permission to use the eight week grace period. Privileges may not be used after the eight week period unless in possession of a valid licence.
Dated: May 2019