What Is the Correct Phraseology for Declaring an Emergency, and What Information Should You Transmit?

Mayday vs. Pan-Pan: Choosing the Right Declaration

When an emergency unfolds in the cockpit, your first transmission sets the tone for everything that follows. The Aeronautical Information Manual (AIM), Emergency Procedures section on Declaring an Emergency, draws a clear line between two distinct situations. A distress emergency — one that is life-threatening or involves a grave and imminent danger — demands the phrase Mayday, Mayday, Mayday, spoken three times. A urgency condition — serious, but not immediately life-threatening — calls for Pan-Pan, Pan-Pan, Pan-Pan, also spoken three times.

This distinction matters more than most student pilots realize. Using Pan-Pan when you have an engine fire or a medical emergency requiring immediate landing is a critical error. ATC interprets each phrase differently and will allocate resources accordingly. If your situation is genuinely life-threatening, say Mayday — do not soften it. The three-fold repetition is intentional: it cuts through radio congestion and signals that what follows is not routine traffic.

What Frequency to Use and Why 121.5 MHz Matters

One of the most practical things the AIM tells you is that you have options when it comes to frequency. Your first instinct should be to transmit on whatever frequency you are already monitoring. If you are in contact with approach control, declare on that frequency. The controller already knows who you are, where you are going, and what aircraft you are flying — that context saves precious seconds.

If you are not in contact with anyone, or if you lose communication, switch to 121.5 MHz, the guard frequency. Nearly every ATC facility in the United States monitors 121.5 continuously, and many military aircraft do as well. It is the universal emergency channel, and a transmission on it will almost certainly reach someone who can help. Many student pilots overlook 121.5 entirely during oral exam prep, but your examiner absolutely knows it and will expect you to name it confidently.

The Information ATC Needs From You

Declaring the emergency is only the first step. What you say next gives controllers and emergency responders the situational awareness they need to help you effectively. The AIM outlines the key elements of an emergency transmission, and a good way to remember them is to think about what a rescue crew would need to find you and prepare for your arrival.

• Aircraft identification — your tail number or flight number, so ATC knows exactly who is calling.
• Nature of the emergency — engine failure, medical emergency, fuel exhaustion, or whatever the situation is. Be specific.
• Position — your location relative to a known fix, VOR, airport, or GPS coordinates if available.
• Altitude — critical for separation from other traffic and for rescue coordination.
• Heading — where you are going right now, even if your intentions are uncertain.
• Intentions — are you diverting to the nearest airport, attempting a forced landing, or requesting vectors?
• Souls on board — the total number of people on the aircraft, including yourself.

That last item — souls on board — is one of the most commonly forgotten pieces of information during both real emergencies and checkride oral exams. It is not bureaucratic detail. Emergency responders use that number to determine how many rescue personnel and medical units to dispatch. Forgetting to include it does not make your declaration invalid, but providing it immediately helps the people trying to help you.

Declare Early, Declare Without Hesitation

Perhaps the most important lesson the AIM conveys — and the one that directly contradicts a fear held by many student pilots — is that early declaration is always the better choice. There is a persistent myth that declaring an emergency will trigger an FAA investigation and result in certificate action. In practice, the FAA strongly encourages pilots to declare early and often. An emergency declaration is not an admission of wrongdoing. It is a request for assistance, and it is exactly what the system is designed for.

Every minute you spend debating whether your situation is serious enough to declare is a minute ATC could have spent clearing traffic, lining up emergency services, or giving you a direct routing to the nearest suitable airport. A situation that seems manageable at 5,000 feet can deteriorate rapidly. Controllers cannot help you if they do not know you need help. The pilot who declares a Mayday and lands uneventfully faces no negative consequences. The pilot who waits too long has far fewer options.

Your examiner will want to see that you understand not just the words to say, but the philosophy behind them — that declaring an emergency is a professional, well-trained response to a deteriorating situation, not a last resort.

If you want to practice questions like this in a realistic oral exam format, try SimulatedCheckride.com.