6 SPEECHLESS TECHNIQUE USING UNMODULATED TRANSMISSIONS

• 6.1 General
  • 6.1.1 When a pilot is able to communicate only by unmodulated transmissions (e.g. when the transmitter is operative but the microphone is unserviceable), the following technique will be employed by ATS:
    • (a) when an unmodulated transmission is heard, the ATS operator will request the pilot activate the transmitter three times; and
    • (b) if the pilot complies ATS will frame questions requiring "YES" or "NO" answers to determine if the aircraft:
      • (i) can continue visually; or
      • (ii) can execute an instrument approach, or has reached a nominated position.
  • 6.1.2 This and any other information required will be obtained by requiring the pilot to use the following code:
    • (a) "YES" or "ROGER" activate transmitter once
    • (b) "NO" activate transmitter twice
    • (c) "SAY AGAIN" activate transmitter 3 times
    • (d) "AT NOMINATED POSITION" activate transmitter 4 times
  • 6.1.3 When it is established that the pilot of the aircraft can receive transmissions, control will be exercised in the normal manner, except that frequency changes will not be requested unless there is no alternative.