4.74 Transponders

4.74.2 State the requirements for the operation of transponders within the New Zealand FIR as per Part 91 & AIP ENR

91.247 Use of transponder and altitude reporting equipment

(a) Except as provide in paragraph (g), a pilot-in-command of an aircraft operating in transponder mandatory controlled airspace designated under Part 71 within the New Zealand FIR must, unless otherwise authorised or instructed by ATC—

• (1) operate the transponder to transmit ADS-B data; and
• (2) ensure that ADS-B data is transmitted at all times when the aircraft begins to move under its own power until it has come to a complete stop at the end of the flight.

(b) A pilot-in-command of an aircraft operating in uncontrolled transponder mandatory special use airspace designated under Part 71 within the New Zealand FIR must operate the transponder —

• (1) in Mode A and Mode C; or
• (2) in Mode S if the aircraft is equipped with Mode S equipment and allocated a unique Mode S code referred to in paragraph (d); or
• (3) referred to in rule 91.257(1) providing an ADS-B system as specified in that rule.