BMAA and LAA TO TAKE OVER VERIFICATION OF
ADS-B OUTPUTS FOLLOWING SUCCESSFUL NATS TRIALS
The British Microlight Aircraft Association
and Light Aircraft Association are set to take over verification of Mode S
Extended Squitter ADS-B installations with non-certified GPS sources, otherwise
known as ADS-B Out, following the successful conclusion of NATS trials to
review the technology.
As part of the development of tools to help
improve flight safety by enhancing situational awareness, last year NATS conducted
a General Aviation ADS-B Trial in Southern England, which was supported by the
CAA, LAA, BMAA and FASVIG. Data recorded over the six-month trial saw GA pilots
transmitting sufficiently accurate ADS-B position information from their transponders
when connected to non-certified GPS sources.
This allowed other airspace users to track
their aircraft in real-time on apps such as Planefinder and FlightRadar24.
Linked with an additional ADS-B receiver technology such as Pilot Aware, it is
helping to increase awareness of nearby ADS-B equipped aircraft making the UK’s
busy airspace even safer.
Now the trial is complete, the BMAA and LAA
have agreed they will continue to approve Mode S Extended Squitter ADS-B
installations with non-certified GPS devices. From 18th March, BMAA and LAA’s
Avionics Modification Approval processes will take over the ADS-B verification
service from NATS.
BMAA members wishing to transmit ADS-B from
a non-certified GPS source connected to an Extended Squitter-capable Mode S
transponder, should contact the BMAA Technical Office (firstname.lastname@example.org).
In support of ADS-B Avionics Modification
Approvals by the BMAA and LAA, NATS has been providing an email service to
supply verification that the correct ADS-B operational status messages are
being broadcast by applicant’s Mode S ES transponders. When used with an
uncertified GPS device, the most important part of the modification is to
ensure the GPS data is tagged as being of low/no integrity. In this situation
the Surveillance Integrity Level (SIL) and System Design Assurance (SDA) values
being broadcast must be zero. Following the trial the BMAA and LAA will take
over this work in continuing to verify Mode S ES ADS-B avionics installations
with uncertified GPS devices.
NATS, LAA, BMAA and FASVIG view the
voluntary adoption of ADS-B electronic conspicuity equipment by GA as an
important enhancement to flight safety and encourage Association members to
implement ADS-B where possible. Further information on the setup of Mode S ES
transponders to broadcast ADS-B is available on the FASVIG website
(www.fasvig.org). Note that not all Mode S ES transponders are capable of being
configured for use with an uncertified GPS.
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