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[F1ANNEX VIII U.K. SPECIALISED OPERATIONS [PART-SPO]

SUBPART D INSTRUMENTS, DATA AND EQUIPMENT U.K.

SECTION 1 U.K. Aeroplanes

SPO.IDE.A.225 Transponder U.K.

Where required by the airspace being flown, aeroplanes shall be equipped with a secondary surveillance radar (SSR) transponder with all the required capabilities. ]