CFC International Communication Standards 2 — Questions and Answers
Question 1: Which ICAO document specifically governs the procedures and phraseology for aeronautical communications?
- Annex 10, Volume II
- Annex 2, Volume I
- Doc 9432 (Correct answer)
- Doc 4444
Correct answer: Doc 9432
ICAO Doc 9432, Manual of Radiotelephony, specifically governs standard phraseology and procedures for aeronautical communications.
Question 2: When a controller needs to relay a message through another aircraft due to communication failure, the relaying aircraft should preface the message with:
- 'Relay follows'
- 'All stations'
- '(Aircraft callsign) pass to (aircraft callsign)' (Correct answer)
- 'Blind transmission'
Correct answer: '(Aircraft callsign) pass to (aircraft callsign)'
The relaying aircraft uses the phrase '(callsign) pass to (callsign)' to clearly identify the originator and intended recipient of relayed messages.
Question 3: In ICAO standard phraseology, what does the word 'WILCO' communicate?
- Message received and understood
- I have received your message
- I will comply with your instructions (Correct answer)
- Wait and I will call you
Correct answer: I will comply with your instructions
'WILCO' (will comply) confirms the pilot has received, understood, and will carry out the instructions given.
Question 4: The SELCAL system is primarily used to:
- Automatically tune radio frequencies
- Alert a flight crew of an incoming call on HF radio (Correct answer)
- Encode ATC clearances digitally
- Assign transponder codes automatically
Correct answer: Alert a flight crew of an incoming call on HF radio
SELCAL (Selective Calling) alerts a specific aircraft's crew when ATC initiates a call, allowing HF radio monitoring without continuous crew vigilance.
Question 5: Under ICAO standards, when should time be included in a position report?
- Only when requested by ATC
- Always, in UTC (Correct answer)
- Only over oceanic airspace
- In local time at the reporting point
Correct answer: Always, in UTC
ICAO requires time in position reports to always be expressed in UTC to maintain standardized global coordination.
Question 6: What is the correct ICAO phraseology when ATC wishes to verify that a pilot has set a specific altimeter setting?
- 'Confirm QNH' (Correct answer)
- 'QNH set?'
- 'Check altimeter'
- 'Verify pressure setting'
Correct answer: 'Confirm QNH'
'Confirm QNH' is the standard ICAO phraseology used to verify the altimeter setting has been correctly received and set.
Question 7: In international aviation, VHF voice communications between 118.000 MHz and 136.975 MHz are channeled at what spacing in most of the world today?
- 50 kHz
- 25 kHz
- 8.33 kHz (Correct answer)
- 100 kHz
Correct answer: 8.33 kHz
8.33 kHz channel spacing is mandated in most ICAO member states to increase VHF spectrum capacity as traffic density grew.
CFC International Communication Standards 2
Which ICAO document specifically governs the procedures and phraseology for aeronautical communications?