ATPL Communications and Procedures 1 — Questions and Answers
Question 1: When should a pilot use the phrase 'MAYDAY MAYDAY MAYDAY' on the radio?
- When requesting priority landing due to a connecting flight
- When declaring an urgency condition requiring fast but not immediate assistance
- When facing a distress condition involving grave and imminent danger (Correct answer)
- When requesting special VFR clearance
Correct answer: When facing a distress condition involving grave and imminent danger
MAYDAY is the international radiotelephony distress signal indicating a grave and imminent danger requiring immediate assistance — the highest priority emergency call.
Question 2: The phrase 'PAN PAN PAN' on the radio indicates:
- A distress condition requiring immediate help
- An urgency condition — a serious problem that does not require immediate assistance (Correct answer)
- Routine traffic advisories
- A test transmission
Correct answer: An urgency condition — a serious problem that does not require immediate assistance
PAN PAN is the international urgency signal indicating a serious situation that requires assistance but is not immediately life-threatening, having priority below MAYDAY.
Question 3: When a pilot reads back an ATC clearance incorrectly, the controller should:
- Accept the readback to avoid delay
- Issue a correction and ensure the pilot acknowledges the correct clearance (Correct answer)
- Re-issue the full clearance from the beginning
- File a safety report only
Correct answer: Issue a correction and ensure the pilot acknowledges the correct clearance
ATC is responsible for ensuring pilots have correctly understood clearances; if a readback is incorrect, the controller must issue a correction and confirm the pilot acknowledges the correct version.
Question 4: Which frequency is the international aeronautical emergency frequency?
- 118.0 MHz
- 121.5 MHz (Correct answer)
- 123.45 MHz
- 243.0 MHz
Correct answer: 121.5 MHz
121.5 MHz is the international civil aeronautical emergency frequency (Guard), monitored by all commercial aircraft and ATC facilities.
Question 5: SELCAL (Selective Calling System) is primarily used to:
- Automatically tune radio frequencies for ATIS broadcasts
- Alert a specific aircraft that ATC wishes to communicate, eliminating the need for continuous radio monitoring (Correct answer)
- Enable satellite-based ADS-B tracking
- Provide automated weather updates in HF ranges
Correct answer: Alert a specific aircraft that ATC wishes to communicate, eliminating the need for continuous radio monitoring
SELCAL allows ATC to alert a specific aircraft using a unique 4-letter code that triggers a chime in the cockpit, freeing the crew from constant HF radio monitoring on long oceanic flights.
Question 6: Under ICAO phonetic alphabet, the letter 'W' is transmitted as:
- Whisky (Correct answer)
- William
- Whiskey
- Wulf
Correct answer: Whisky
In the ICAO/NATO phonetic alphabet, 'W' is transmitted as 'Whisky' to ensure clarity and avoid confusion during radio communications.
ATPL Communications and Procedures 1
When should a pilot use the phrase 'MAYDAY MAYDAY MAYDAY' on the radio?