CFC Communication Equipment Operation 5 — Questions and Answers
Question 1: When a controller issues the instruction 'MONITOR' for a specific frequency, what action should the pilot take?
- Tune and transmit a check-in call on that frequency
- Tune to that frequency and listen without transmitting unless called (Correct answer)
- Record the frequency for use at the next waypoint
- Acknowledge on the current frequency then switch and remain silent
Correct answer: Tune to that frequency and listen without transmitting unless called
A 'monitor' instruction means tune to the frequency and listen passively — do not transmit an initial contact call unless the facility calls you first.
Question 2: What is the recommended technique when making a blind transmission due to suspected receiver failure?
- Broadcast on 121.5 MHz only and wait for relay
- Preface transmissions with 'TRANSMITTING BLIND' and state intentions, transmitting twice (Correct answer)
- Switch to the interphone system and contact the cabin crew
- Squawk 7600 and do not transmit to avoid frequency congestion
Correct answer: Preface transmissions with 'TRANSMITTING BLIND' and state intentions, transmitting twice
Transmitting blind informs any monitoring station of the situation and repeating the transmission increases the chance that at least one copy is received.
Question 3: How does the audio integrating system (AIS) or audio management unit (AMU) enhance cockpit communications?
- It amplifies HF signals for clearer oceanic reception
- It allows crew members to select and mix multiple radio and interphone audio sources (Correct answer)
- It automatically records all ATC communications for post-flight review
- It filters weather radar returns from navigation audio feeds
Correct answer: It allows crew members to select and mix multiple radio and interphone audio sources
The AIS/AMU lets pilots individually select which radios, navigation aids, and interphone sources they want to hear, avoiding audio overload.
Question 4: What is the significance of transmitting on a frequency with 8.33 kHz channel spacing rather than 25 kHz spacing?
- 8.33 kHz spacing is used exclusively for oceanic HF communications
- 8.33 kHz spacing provides three times more VHF channels in congested European airspace (Correct answer)
- 8.33 kHz radios use SSB modulation while 25 kHz radios use AM
- 8.33 kHz is the guard frequency spacing mandated by ICAO for distress calls
Correct answer: 8.33 kHz spacing provides three times more VHF channels in congested European airspace
8.33 kHz channel spacing triples VHF channel availability compared to 25 kHz spacing, addressing frequency congestion in high-density airspace like Europe.
Question 5: A pilot hears a partial message from ATC and is uncertain of the content. What is the correct response?
- Read back what was heard and ask the controller to confirm the missing portion (Correct answer)
- Acknowledge with 'roger' and request clarification at the next checkpoint
- Remain silent and wait for the controller to re-transmit automatically
- Squawk IDENT to alert the controller of reception difficulty
Correct answer: Read back what was heard and ask the controller to confirm the missing portion
Partially reading back what was received and specifically requesting the missed portion ensures the crew acts on accurate information.
Question 6: Which of the following correctly describes the use of the interphone system on a multi-crew aircraft?
- It provides encrypted ATC communication for sensitive military operations
- It enables private voice communication between crew members without transmitting on radio frequencies (Correct answer)
- It connects the flight deck to ground maintenance personnel via VHF
- It is used to relay ATIS information between crew members during approach
Correct answer: It enables private voice communication between crew members without transmitting on radio frequencies
The interphone system is an internal communication network that allows crew members to talk to each other without keying aircraft transmitters.
Question 7: What action should be taken if a pilot accidentally transmits on the wrong frequency?
- Continue the transmission on the wrong frequency to avoid confusion
- Cease transmitting, switch to the correct frequency, and advise ATC of the error if it caused confusion (Correct answer)
- Declare a communications emergency on 121.5 MHz
- Squawk 7700 and await ATC instructions
Correct answer: Cease transmitting, switch to the correct frequency, and advise ATC of the error if it caused confusion
Stopping the unintended transmission and correcting to the proper frequency minimizes confusion, and informing ATC of any resulting disruption is good airmanship.
CFC Communication Equipment Operation 5
When a controller issues the instruction 'MONITOR' for a specific frequency, what action should the pilot take?