MAYDAY vs PAN PAN: What ROC-A Candidates Should Know
MAYDAY vs PAN PAN: What ROC-A Candidates Should Know
Emergency communication is one of the most important parts of ROC-A study. Candidates should clearly understand the difference between distress and urgency communication, because the words MAYDAY and PAN PAN have different meanings and different levels of priority.
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Quick answer
MAYDAY is used for distress: grave and imminent danger requiring immediate assistance. PAN PAN is used for urgency: a safety concern involving an aircraft, vehicle, or person, but not requiring immediate assistance.
Distress: MAYDAY
RIC-21 defines distress as a condition of being threatened by grave and/or imminent danger and requiring immediate assistance.
RIC-21 says the spoken distress signal is “MAYDAY” and should be used at the beginning of the first distress communication.
RIC-21 also states that a distress call has absolute priority over all other transmissions, and stations hearing it must stop transmissions capable of interfering with distress traffic and continue listening on the frequency used.
Urgency: PAN PAN
RIC-21 defines urgency as a condition concerning the safety of an aircraft or other vehicle, or someone on board or within sight, but which does not require immediate assistance.
Urgency communication is serious, but it is not the same as distress. ROC-A candidates should understand the difference clearly.
Why this matters for ROC-A
Emergency communication is included in RIC-21’s ROC-A study content, along with distress communications, urgency communications, frequencies to be used, distress messages, urgency messages, and cancellation procedures.
Do not practise emergency calls casually
Emergency words should not be used casually or for humour. They are reserved for specific safety situations and have defined meaning in aeronautical communication.
What candidates should know
ROC-A candidates should understand:
- Distress vs urgency.
- The priority of distress traffic.
- Basic emergency message structure.
- The role of the station in distress.
- When to listen and avoid interference.
- Why clear radio discipline matters during emergencies.
Clear speech still matters
RIC-21 explains that operators should speak plainly and clearly, avoid shouting, avoid speaking too quickly, and keep speech at a steady rate.
Where ROCALicence.com fits
ROCALicence.com helps candidates study emergency communication in a practical, non-intimidating way before the official ROC-A exam.
Helpful links
- Free ROC-A Study Hub: https://rocalicence.com/study-hub
- Free ROC-A Practice Quiz: https://rocalicence.com/quiz-1
- Book your ROC-A exam: https://rocalicence.com/roca
- ISED ROC-A overview: https://ised-isde.canada.ca/site/spectrum-management-telecommunications/en/licences-and-certificates/radio-authorizations/radio-operator-certification/restricted-operator-certificate-aeronautical-roc
- ISED RIC-21 ROC-A study guide: https://ised-isde.canada.ca/site/spectrum-management-telecommunications/en/licences-and-certificates/radiocom-information-circulars-ric/ric-21-study-guide-restricted-operator-certificate-aeronautical-qualification-roc
- Transport Canada phraseology overview: https://tc.canada.ca/en/aviation/publications/aviation-safety-letter/issue-4-2022/phraseology-guides
- NAV CANADA Operational Guides: https://www.navcanada.ca/en/aeronautical-information/operational-guides.aspx
Final takeaway
MAYDAY and PAN PAN are not interchangeable. MAYDAY means distress and immediate assistance. PAN PAN means urgency and a serious safety concern. ROC-A candidates should know the difference before the exam.
Study free: https://rocalicence.com/study-hub
Book when ready: https://rocalicence.com/roca
General educational information only. In real emergencies, follow official procedures, training, and applicable regulations.
