Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p206
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 206/225)
Character Range: 850462–853348

AFCS may be used in conjunction with a pilot-activated lighting system.

       (2) The requirement under subsection (1) may be satisfied by one of the following facilities:

(a) an aerodrome frequency response unit (AFRU);

(b) a UNICOM service;

(c) a CA/GRS.

22.03 Operation of UNICOM or CA/GRS

        If a UNICOM or CA/GRS is provided, it must operate for the period 30 minutes before arrival to 30 minutes after departure of each scheduled air transport operation.

Note   See also section 22.06.

22.04 Aerodrome frequency response unit

       (1) If an AFRU is provided, and if a transmission, whether a radio broadcast or an unmodulated carrier burst, is made from an aircraft operating within radio range of the AFRU on the aerodrome frequency, then the AFRU must:

(a) be able to detect the presence of aircraft VHF carrier transmissions of 2 seconds or more duration; and

(b) at the end of the transmission — automatically respond with one of the following types of transmissions on the aerodrome frequency:

 (i) a pre-recorded short voice message, if there has been no other received aircraft transmissions in the previous 5 minutes;

           Note   The pre-recorded short voice message normally takes the form of the aerodrome name.

 (ii) a short (300 ms) tone burst if any transmissions have been received in the previous 5 minutes.

       (2) Additional safety related aerodrome information may also be included in the AFRU voice message.

       (3) For any transmissions which consist of 3 sequential carrier bursts over a 5 second period, the AFRU must be able to do the following regardless of radio transmission activity in the previous 5 minutes:

(a) detect the transmissions;

(b) respond to them in accordance with paragraph (1) (b).

       (4) The AFRU must meet the technical requirements of, and be certified as complying with, the Australian Communications and Media Authority Equipment Compliance Requirements ECR 203A for Amplitude Modulated Transmitter/Receivers (Base and Mobile) for 25 kHz Carrier Frequency Separation in the Aeronautical Frequency Band 118 - 137 MHz, as in force or existing from time to time.

Note   The Australian Communications and Media Authority Equipment Compliance Requirements mentioned in subsection (4) are freely available on the Federal Register of Legislation.

       (5) Frequency coverage for the AFRU must be in the range 118.000 to 136.975 MHz at 25 kHz separation.

       (6) The receiver must be:

(a) set for a sensitivity of at least 15 µV; and

(b) adjusted to a higher value in the case of nuisance activation or other interference.

       (7) The AFRU must have a minimum capacity of 8 seconds for the recorded voice message.

       (8) The AFRU audio transmissions must be clear and intelligible.

       (9) The length of carrier transmission must not exceed the AFRU recorded voice message