Electronic Conspicuity

This project aims to assist pilots mitigate against the risk of mid-air collision and avoid infringing controlled airspace by improving the electronic conspicuity of VFR aircraft.

Airspace4All will continue the work undertaken as FASVIG to contribute to the development of Electronic Conspicuity in the UK, including participation in the CAA’s Electronic Conspicuity Working Group.

One specific element of this project is an ADS-B trial to demonstrate the possibilities for small GA-oriented airfields to improve situational awareness for ATS staff and pilots. This trial may incorporate or collaborate with elements of other planned or concurrent trials elsewhere in the UK to help design the blueprint for wider UK adoption.

Share

GA Airfield ATS ADS-B Traffic Display Trial

Under the auspices of the CAA Electronic Conspicuity Working Group (ECWG), in July 2017 FASVIG published a document to the ECWG entitled “FASVIG GA Airfield Pseudo Radar Trial” outlining a proposed trial of low-cost Automatic Dependent Surveillance Broadcast (ADS-B) traffic display technology by GA airfields ATS units. This was endorsed by the CAA in a public statement on 16th August 2017.

Now, under the new Airspace4All banner, we propose to run the GA Airfield ADS-B Traffic Display Trial during a six month window at each airfield commencing in 2019 (subject to CAA permission).

The aim of the trial is to gather evidence to enable the CAA to assess this capability and give consideration to policy change authorising use of ADS-B real-time traffic displays by GA ATS units. Additionally, it is hoped this trial will encourage further development of technology to support ATS provision at UK GA airfields.

For the duration of the trial the ATS Units at three GA airfields will be equipped with real-time flight tracking equipment that provides a situational awareness tool (which is not to be used to provide any form of Air Traffic Control service).

The Trial Airfields are:
• City Airport Manchester Barton (Barton) – trial commenced at Barton on 1st March 2019
• Chichester/Goodwood Aerodrome (Goodwood)
• North Weald Airfield

Additionally, to complement those aircraft already equipped with ADS-B Out, a number of general aviation aircraft based at the Trial Airfields will be equipped with CAP1391-compliant ADS-B Out devices. Airborne ADS-B capabilities of the CAP1391 compliant devices are outside the scope of the trial.

The data transmitted by General Aviation aircraft during the trial is not assured, and has been treated as such in the safety assessment.

Trial Safety Plan & Safety Case

Airspace4All has been required to create two supporting documents for the GA Airfield ATS ADS-B Traffic Display Trial which were approved by the CAA on 12th October 2018. These formal (and somewhat technical) documents explain everything about the trial. The formal risk assessment is covered by the Safety Case.

These types of documents are not normally made public. However, Airspace4All wishes to maximise understanding of the trial within the GA community and has agreed with the CAA that these documents can be made public. The reader will hopefully gain some insight into what is involved in running our trial and why these activities do not come about overnight.

The documents are available here:

Trial Safety Plan
Trial Safety Case

Please note that the above documents still refer to Gloustershire Airport but Gloucester have suspended their participation in the trial. The third airfield is now North Weald Airfield in Essex.

Barton Specific Arrangements – GA Airfield ATS ADS-B Traffic Display Trial

Airfield specific arrangements for aircraft operators wishing to participate in the Airspace4All GA Airfield ATS ADS-B Traffic Display Trial at City Airport and Heliport (Manchester Barton) City Airport.

1              Introduction

1.1          In co-operation with Airspace4All and the CAA’s Electronic Conspicuity Working Group and City Airport and Heliport (Manchester Barton) City Airport Ltd are trialling the use of a lowcost traffic display technology for GA airfield ATS units.

1.2          The aim of the trial is to gather evidence to enable the CAA to assess this capability and give consideration to policy change authorising use of ADS-B real-time traffic displays by GA ATS units. Additionally, it is hoped this trial will encourage further development of technology to support ATS provision at UK GA airfields

2              General

2.1          The Airfield’s ATS unit (callsign ‘Barton Information’) will be equipped with real-time flight tracking equipment that provides a situational awareness tool (which does not provide any form of Air Traffic Control service). A number of General Aviation aircraft based at the Trial Airfields will be equipped with ADS-B Out devices as part of a trial

2.3          The ADS-B Display is only capable of displaying ADSB-Out equipped aircraft and that aircraft that are Mode A/C/S only equipped will not be displayed to ATS staff, the Pilot in Command remains solely responsible for the safe conduct of flight

3              Qualifications to participate in the Trial

3.1          Only aircraft capable of transmitting ADS-B on 1090Mhz are eligible, this may be by either an integrated ADS-B out via a Mode S transponder or via a standalone CAP1391 approved ADS-B device.

3.2          Airspace4All is loaning a number of CAP1391 approved ADS-B devices to operators at the airfield. Loan of these devices will be arranged by invitation from the Airfield.

3.3          Additionally a limited number of aircraft will be permitted to transmit on a Mode S only (non-ADS-B) equipped aircraft via a separate portable CAP 1391 device which is not integrated to a transponder. This will only be permitted via special arrangement with the Airfield, NATS and the CAA.

4              Pilot Position Reporting Procedures Phraseology

4.1          for the duration of the trial participating aircraft are requested to use the phraseology described below.

4.2          Inbound/ Transiting Aircraft: Inbound aircraft which are carrying a functioning ADSB-Out equipment will report on initial contact with Barton Information that they are ‘ADSB equipped’

Example “Barton Information, G-ABCD, Request join, ADSB equipped”

Example “Barton Information, G-ABCD, Request Basic Service, ADSB equipped”

4.3          Aircraft should report their position in relation to a Visual Reference Point (VRP), as listed in the Manchester Barton AIP AD 2.EGCB-1 Section 4, and their altitude referenced to the Manchester QNH

Example “G-ABCD PA28, two miles north west of Middlebrook VRP, Altitude 2500ft QNH 1008, 2POB, request joining information”

Aircraft should make all other position reports (such as Entering the ATZ, Overhead, Descending Deadside, Downwind etc as normal)

4.4          Departing aircraft: Departing aircraft which are carrying a functioning ADSB-Out equipment will report on initial contact with Barton Information that they are ‘ADSB equipped’

Example “Barton Information, G-ABCD PA28 on apron, 2POB with Information Delta request taxi for Local flight, ADSB Equipped”

Departing aircraft will report leaving the ATZ and confirm the direction they are leaving to

Example “G-CD leaving the ATZ North East”

5              Information from ATS based on Traffic Display

Pilots are to be aware that, whilst no ATC service will be provided, Barton Information may provide generic information based on the display to ADSB-Out equipped aircraft. This may include generic traffic information, warnings of the proximity of controlled airspace as well as warnings of aircraft approaching rising terrain in poor weather. It is emphasised that such information and warnings are not guaranteed and that the Pilot in Command remains solely responsible for the safe conduct of flight.

6              Trial Period

6.1          The trial is expected to start 1st March 2019 and will run for 6 months from this date unless otherwise notified.

7              Additional Information

7.1          The standalone CAP1391 approved SkyEcho devices do not support squawk codes and pilots are required to set the allocated squawk on their aircraft transponders. Pilots are reminded that the Barton Conspicuity Squawk (which is only to be selected when advised by Barton Information), and any other squawk allocated, or selected, are to be set only on the aircraft’s inbuilt transponder – no attempt is to be made to modify settings on the SkyEcho.

8              Summary

8.1          For the purpose of the trial:

  • No level of ATC service will be provided
  • The system is purely to assist the situational awareness of the FISOs
  • Traffic information may not be passed, and pilots remain responsible at all times for the safe conduct of their flight and seeing and avoiding other traffic
  • The picture the FISOs have may be incomplete as only ADSB equipped a/c will be displayed

9              Contact

Any queries with regards to this trial shall be directed to adsbtrial@cityairportltd.com or via the on site Airport Duty Manager at Manchester Barton.

Share

Electronic Conspicuity News

NATS Publish Mode S/CAP1391 ADS-B Simultaneous Transmission Study

Published by NATS today ( https://www.nats.aero/news/enabling-ads-b-out-for-general-aviation-gathers-pace/ ) : Enabling ADS-B OUT for General Aviation gathers pace Efforts to help private pilots ...
Continue Reading

Goodwood Flying School Piper Cub & Cessna 172 fleet to fly with CAP1391 ADS-B Transceivers

Goodwood Flying School has been granted permission today by the CAA to use CAP1391-approved ADS-B transceivers in their Piper Cub and Cessna ...
Continue Reading

Barton ADS-B Traffic Display Video Clip – 7th April 2019

Here is a short video clip from the City Airport (Manchester Barton) ADS-B Traffic Display from the afternoon of Sunday ...
Continue Reading

EASA CS-STAN Issue 3 permits non-certified GPS for ADS-B

As previously mentioned, EASA have now published CS-STAN Issue 3 which contains numerous aircraft standard changes that may now be ...
Continue Reading

GA Airfield ATS ADS-B Traffic Display Trial – Goodwood Update

The Airspace4All GA Airfield ATS ADS-B Traffic Display Trial is not yet live at Goodwood Aerodrome in West Sussex. However, ...
Continue Reading

CAA Call for Evidence: Electronic Conspicuity Solutions

CAA published a ‘Call for Evidence’ on Electronic Conspicuity Solution on 18th March 2019. Deadline for responses is 25th May ...
Continue Reading

EASA to permit CofA aircraft to use non-certified GPS for Mode S ES ADS-B

Back in January 2017 Airspace4All (then under the name of FASVIG) published a report entitled "Non-Certified GPS ADS-B 'Quick Win’ ...
Continue Reading

North Weald Airfield in Essex to participate in Airspace4All GA Airfield ATS ADS-B Traffic Display Trial

Following a great deal of hard work and thorough planning by trial management and our volunteer aerodromes’ staff, the Airspace4All ...
Continue Reading

Bringing ADS-B Surveillance Trial To GA Airfields

Steve Cooper is a FISO at Barton and has worked hard to help get our GA Airfield ADS-B Traffic Display ...
Continue Reading

CAA STT – Mode S/CAP1391 ADS-B Transceiver ‘Simultaneous Transmission Trial’

Simultaneous transmission from Mode S transponders and CAP1391-approved ADS-B transceivers from the same aircraft is not currently permitted by the ...
Continue Reading

Previous FASVIG work on ADS-B

Information about previous work undertaken by FASVIG on Electronic Conspicuity can be read by following this link:

FASVIG work on ADS-B