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5.1 International environments
5.1.1 United Kingdom
EC devices are intended for voluntary carriage on registered and non-
registered UK Annex II aircraft, non-complex EASA aircraft of <5700kg
MTOM and for gliders and balloons (including those covered under ELA 1
and ELA 2) within uncontrolled UK airspace. EC Devices do not replace the
need for a transponder when required by airspace/flight rules. Aeronautical
Information Circular (AIC) Y 141/2019 allows for the use of EC devices
simultaneously with ATCRBS or Mode S transponders which are not
Extended Squitter (ES) or ADS-B OUT enabled. If your aircraft is ADS-B
OUT enabled, you must disable the transmit function of SkyEcho from the
configuration settings.
5.1.2 Australia
In Australia, EC devices are intended for voluntary fitment on registered
and non-registered aircraft conducting VFR operations. They are not
permitted for IFR operations.
The fitment is not a substitute for mandatory carriage of a transponder nor
mandatory ADS-B in relevant airspace. In addition, they must not be
allowed to transmit when
(a) in VFR flight at or above FL290; or
(b) concurrently with a Mode S transponder that is also transmitting
ADS‑B. An EC device may be operated in Australia concurrently with a
Mode A/C, or a Mode S transponder (other than one that is transmitting
ADS-B).UAT is NOT used nor permitted in Australia
CASA regulations are at
https://www.legislation.gov.au/Details/F2020L00693
An AC is available at
https://www.casa.gov.au/files/ac-91-23-v10
CASA ADS-B guidance is at
https://www.casa.gov.au/book-page/chapter-
4-surveillance-and-ads-b
UAV-1002156-001
ECCN 7A994
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REV I
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