109. Pressure-altitude reporting transponder

An AOC holder must ensure that every large aeroplane is equipped with a pressure‑altitude reporting transponder —

which operates in accordance with the provisions of Volume IV of Annex 10 of the Chicago Convention;

which is capable of operating in Mode S;

which has a data source that provides pressure‑altitude information with a resolution of 7.62 m (25 ft) or better; and

which is provided with airborne or on‑the‑ground status of the aeroplane when that aeroplane is equipped with an automatic means of detecting such status.