Note:  At the time of writing the brochure, ICAO has been reviewing the coding of equipment carried on-board, including ADS-B. The new codes are expected to be in force in 2012.

.  
Be sure to master ADS-B procedures (e.g. principles, coverage, terminology, phraseology, regional – normal and emergency – procedures).

Refer to Appendix A – Worldwide ADS-B implementation and Appendix B – ADS-B phraseology for more information.

.  
Note that with ADS-B surveillance in non-radar areas (NRA), according to the type of transponder on board, the ATC controller may not be able to identify the type of emergency you may encounter (i.e. 7500, 7600 or 7700). Refer to AIP for applicable procedures. See also 2.2.5 – Discrete Emergency Codes and

2.2.6 – DO-260 and DO-260A.
.  To preserve SSR or TCAS operations, do not switch off transponder or altitude reporting when instructed to stop transmitting ADS-B data or ADS-B altitude (see 2.2.17 – ADS-B Controls and Indications and Appendix B
– ADS-B phraseology).
.  For more information, refer to (see References):
o  Eurocontrol Flight Crew Guidance for Flight Operations in ADS-B only Surveillance Airspaces.

o  Airservices Australia Flight Operations Information Package and CASA Pilot Information Booklet.

2.6. REGULATIONS FOR TRANSPONDER

2.6.1. CARRIAGE OF TRANSPONDER
The carriage of transponder capable of Mode C is mandatory in all ICAO member States as per ICAO Annex 6 – Operations of Aircraft – Part I:
“6.19.1 All aeroplanes shall be equipped with a pressure-altitude reporting transponder which operates in accordance with the relevant provisions of Annex 10, Volume IV.

6.19.2 All aeroplanes for which the individual certificate of airworthiness is first issued after 1 January 2009 shall be equipped with a data source that provides pressure-altitude information with a resolution of 7.62 m (25 ft), or better.
6.19.3 After 1 January 2012, all aeroplanes shall be equipped with a data source that provides pressure-altitude information with a resolution of 7.62 m (25 ft), or better.
6.19.4 Recommendation. The Mode S transponder should be provided with the airborne/on-the-ground status if the aeroplane is equipped with an automatic means of detecting such status.”
As per EASA EU OPS 1.866, a transponder capable of Mode C is mandatory and other transponder capabilities may be required for the route being flown. At the time of writing this brochure, the carriage of Mode S ELS transponder is mandatory in the entire European airspace, and the carriage of Mode S EHS transponder is mandatory in the core area of Europe (i.e. Belgium, France, Germany, Luxembourg, The Netherlands, Switzerland and the United Kingdom) as per the Eurocontrol Specimen AIC – Carriage and Operation of SSR Mode S Airborne Equipment in European Airspace (see References). The mandate will
　
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