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b) Electronic Conspicuity:
▪ CAP1391 Electronic Conspicuity (EC) devices is being updated to accommodate major changes and
improvements to handheld devices.
Last updated: 20 April 2021
OFFICIAL - Public
GASCo Members' Safety Information Exchange – 23
Nov 24
Flying over winch launch sites
Use of carbon monoxide (CO) detectors
Just culture
Maintenance Errors
Electronic Conspicuity
Crashworthy fuel systems
Unrest over PMDs
Suicide/Mental health issues
Airspace Infringements
Concern over entry standards for instructor courses
Normalisation of Deviance
Flying over winch launch sites
Use of carbon monoxide (CO) detectors
Just culture
Maintenance Errors
Electronic Conspicuity
Crashworthy fuel systems
Unrest over PMDs
Suicide/Mental health issues
Airspace Infringements
Concern over entry standards for instructor courses
Normalisation of Deviance
OFFICIAL - Public.
Last updated: 21 August 2024
First published April 2025
Enquiries regarding the content of this publication should be addressed to:
testand.evaluationteam@caa.co.uk
The latest version of this document is available in electronic format at: www.caa.co.uk/CAP3099
Test & Evaluation Annual Report 2024-2025 Contents
April 2025 Page 3
OFFICIAL - Public.
Last updated: 15 April 2025
Enhanced conspicuity can enable, as appropriate:
(1) airborne collision warning and/or avoidance systems;
(2) a ‘known’ or ‘recognised’ air traffic environment which, in turn, permits ATS to provide
more specific traffic information on collision hazards; and,
(3) ground-based safety nets such as short-term conflict alert (STCA) and minimum safe
altitude warning (MSAW).
Last updated: 13 January 2022
Share the Air Electronic Conspicuity: Mr Swan related that a lightweight
transponder has been designed to identify the position of flying objects, and that it
could be fitted in the cockpit and connected to a tablet to view the information.
Last updated: 26 April 2021
b) Electronic Conspicuity:
The Electronic Conspicuity Call for Evidence opened on 18 March and has received around 200
responses received (mostly from GA stakeholders) ahead of its closure on 25 May.
Last updated: 21 October 2021
Electronic Conspicuity (EC)
To help mitigate the MAC risk between UA and other aircraft operating at very low
level in the vicinity of an AAE, a UA operating within an AAE should be equipped with a
Universal Access Transceiver (UAT) device transmitting on 978MHz and receiving on
dual frequencies 978 MHz and 1090 MHz.
Last updated: 21 May 2026
In this version:
• the operating model for integrated BVLOS operations
• the technical architecture across six workstreams: Electronic Conspicuity, Detect
and Avoid, Command and Control, UAS Traffic Management, System Wide
Information Management and Ground Infrastructure
• operational scenarios used to develop and test policy
• the technical requirements each workstream is expected to place on operators and
manufacturers
Examples of things not yet in scope, but coming:
• Remote Identification (RID)
• Common Information Service Provider (CISP) functions
• Detailed treatment of UA-to-UA risk
Airspace Architecture for Future Operations: Explainer July 2026
July 2026 Page 3
OFFICIAL - Public.
Last updated: 30 July 2026
The Forum discussed timely and effective GA community engagement; proposals for
lower airspace electronic conspicuity; and agreed that the airspace engagement needs separate focus
to review general aviation, search & rescue aviation and business aviation interests.
Last updated: 21 October 2021
To be
most effective it needs 100% of users operating in a designated block of airspace to
be using compatible electronic conspicuity devices, and to be able to be detected by
others30.
2.11 UTM implementation will utilise existing ATM technologies and infrastructures to
provide a strategic advantage, highlighting the importance of building on established
systems to ensure continuity and efficiency.
Last updated: 05 June 2026
