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Electronic conspicuity NERL’s vision for implementation, including
landscape, challenges, benefits (safety and
capacity) and costs.
Last updated: 17 November 2021
We will ensure that the needs and benefits of a co-operative environment are
communicated as part of the outcome of the Airspace and Safety Initiative Electronic
Conspicuity Working Group investigations.
Last updated: 06 November 2013
• where segregation is necessary, it is proportionate (for example, in terms of volume,
duration and time of day/year)
• where segregation is necessary, mitigations are put in place to reduce impacts (for
example, danger area crossing service for a proposed danger area)
• facilitates the planning and ongoing demand for airspace (including utilising information
available from flight intent/plan data), improving predictability for airspace users
• enables an electronically interoperable environment (for example, adoption of
electronic conspicuity to enable integration)
• manages airspace in a flexible, near real-time operation (for example, maximises the
amount of time that access is possible in airspace that at some point requires
segregation)
• allows for operators to achieve their desired business trajectory
• greater integration of air traffic without adding undue complexity to the design of the
airspace (that is, routing and procedures).
Last updated: 11 September 2025
First published November 2023
Enquiries regarding the content of this publication should be addressed to: airspace.policy@caa.co.uk
The latest version of this document is available in electronic format at: www.caa.co.uk
mailto:airspace.policy@caa.co.uk
CAP 1616f Contents
November 2023 Page 3
Contents
Contents 3
Revision history 7
Chapter 1 8
Introduction 8
Who is this Document for?
Last updated: 23 November 2023
A summary of the benefits include:
• Improved understandings of the safety risks of mid-air collisions and loss of control to enable us as
the CAA to have a stable safety overview for our day-to-day regulatory duties (for example safety risk
treatment of Loss of Control (LoC) and Mid-Air Collision (MAC)
• Enabling us to see trends and evidence to inform manufacturers where technology needs improvement
• Improving our RPAS authorisations because we’ll have a better understanding of what needs to be
covered by training, education, specifications, and operations manuals
• Enabling us to review the risk and safety picture for current and emerging trends and technologies (such
as routine BVLOS in non-segregated airspace and the associated benefits that such an approval would
bring for companies, industry, the economy, the public etc)
• Safety assurance and regulatory support to the UK Airspace Modernisation Strategy
• Technology and infrastructure confidence in support of the Electronic
Last updated: 07 June 2022
To help achieve that aim we have been working
with the DfT to run a rebate scheme for General Aviation pilots and
RPAS operators purchasing electronic conspicuity devices.
Last updated: 10 February 2022
First published 2023
First edition
Enquiries regarding the content of this publication should be addressed to: innovation@caa.co.uk
The latest version of this document is available in electronic format at: www.caa.co.uk
CAP 2530 Introduction
February 2023 Page 3
Contents
Introduction 5
Chapter 1 7
Airspace Fundamentals 7
The Fundamentals of Airspace 8
What Controlled Airspace Exists in the UK?
Last updated: 11 July 2023
RMZs and TMZs are
utilised to enhance the conspicuity of aircraft operating within or in the vicinity of complex
or busy airspace for the safety of all members of the flying communities.’
2.12.14.
Last updated: 23 November 2021
A TMZ is intended to improve the conspicuity of aircraft operating within or in the
vicinity of complex or busy airspace, without the need for a more restrictive
classification of airspace.
Last updated: 14 July 2023
b. the integrity of surveillance systems and other electronic aids to navigation by
preventing unwanted reflections and diffractions of the radio signals.
Last updated: 17 December 2025
