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Following a radio failure, the pilot tries to re-establish communications. All transmissions are preceded with "Transmitting blind." What must the pilot do after this phrase?

1. Set the SSR code to 7500
2. Repeat the message twice on the designated channels
3. Include the name of the station being addressed
4. Deviate from the assigned route by at least 45°

  • A
    1 and 4
  • B
    3 and 4
  • C
    2 and 3
  • D
    1 and 2

ICAO Annex 10, Volume II
5.2.2.7.1.3 Receiver failure

5.2.2.7.1.3.1 When an aircraft station is unable to establish communication due to receiver failure, it shall transmit reports at the scheduled times, or positions, on the channel in use, preceded by the phrase “TRANSMITTING BLIND DUE TO RECEIVER FAILURE”. The aircraft station shall transmit the intended message, following this by a complete repetition. During this procedure, the aircraft shall also advise the time of its next intended transmission.

5.2.2.7.1.3.2 An aircraft which is provided with air traffic control or advisory service shall, in addition to complying with 5.2.2.7.1.3.1, transmit information regarding the intention of the pilot-in-command with respect to the continuation of the flight of the aircraft.

5.2.2.7.1.3.3 When an aircraft is unable to establish communication due to airborne equipment failure it shall, when so equipped, select the appropriate SSR code to indicate radio failure.

SSR CODE MANAGEMENT. Use the following mnemonics:
• Code 7500 = Unlawful interference ("75 - man with a knife")
• Code 7600 = Radio failure ("76 - I need a radio fix")
• Code 7700 = Emergency/distress ("77 - going to heaven")

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