Consultation on Electronic Conspicuity – Initial Technical Concept of Operations

Closes 6 Oct 2025

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Equipage requirements

You will be asked to provide your views on each of the proposed positions with regard to how it delivers on the ConOps's two aims:

  • enhancing manned aircraft situational awareness; and
  • enabling detect-and-avoid for Unmanned Aircraft Systems (UAS).

You do not need to respond to every position in the ConOps, so please focus on the areas most relevant to your expertise or operations.

12. Position 4. Within non - segregated airspace, aircraft operating at <140 knots (Kts) Indicated Air Speed (IAS) must use 1090MHz ADS-B devices emitting a SIL and SDA of at least 1, such as (for example) some CAP1391 devices. Alternatively, a TSO-C112 and TSO-C166 compliant transponder with extended squitter connected to TSO-C199 class B or TSO-C145 Global Navigation Satellite System (GNSS) source.

To what extent, if at all, do you agree or disagree that this position supports the two primary objectives of this Initial EC Technical ConOps?

13. Position 5. Within non - segregated airspace, aircraft operating at >140kts IAS must use a Mode S transponder with ADS-B Extended Squitter functionality and SIL = 3, SDA = 2, typically a TSO-C112 and TSO-C166 compliant transponder connected to a TSO-C145 GNSS source.

To what extent, if at all, do you agree or disagree that this position supports the two primary objectives of this Initial EC Technical ConOps?

14. Position 6. Any ADS-B – In carriage for manned aircraft will remain a personal or organisational risk-based choice for the manned aircraft operator.

NOTE: This position refers specifically and only to the reception of ADS-B.

To what extent, if at all, do you agree or disagree that this position supports the two primary objectives of this Initial EC Technical ConOps?

15. Position 7. Within non - segregated airspace, UAS in the Specific Category operating BVLOS, must emit a 978MHz UAT ADS-B signal. The device should function in accordance with the RTCA minimum performance standards DO-282B, (It is expected that DO-282C will be the standard from 2027) and of a minimum power yet to be set out within CAP1391 supplementary amendment 2025/01. Emissions must meet SIL and SDA of at least 1.

To what extent, if at all, do you agree or disagree that this position supports the two primary objectives of this Initial EC Technical ConOps?

16. Position 8. Specific category UAS operating BVLOS in non - segregated airspace must be equipped to receive ADS-B 1090MHz and 978MHz UAT in order to detect both manned and unmanned aircraft.

To what extent, if at all, do you agree or disagree that this position supports the two primary objectives of this Initial EC Technical ConOps?