Aviation has its own small vocabulary built for clarity over a noisy radio: a phonetic alphabet so letters cannot be confused, a standard way to speak numbers, and a handful of words that each mean exactly one thing. Learn this set and the radio stops feeling like a foreign language. Here is the full alphabet, how to say numbers, and the standard words you will hear and use every flight.
Part of our Radio Communications guide. Put it into practice in your first radio call.
The phonetic alphabet
Letters like B, C, D, and E sound nearly identical over a radio, so pilots spell with the NATO phonetic alphabet, where each letter has a distinct code word.
| Letter | Word | Letter | Word |
|---|---|---|---|
| A | Alpha | N | November |
| B | Bravo | O | Oscar |
| C | Charlie | P | Papa |
| D | Delta | Q | Quebec |
| E | Echo | R | Romeo |
| F | Foxtrot | S | Sierra |
| G | Golf | T | Tango |
| H | Hotel | U | Uniform |
| I | India | V | Victor |
| J | Juliet | W | Whiskey |
| K | Kilo | X | X-ray |
| L | Lima | Y | Yankee |
| M | Mike | Z | Zulu |
Speaking numbers
Numbers are generally spoken digit by digit so they cannot be misheard. The number 125 is “one two five,” and a tail number ending in 45 is “four five.” A few conventions help:
- Say each digit separately: 7,500 feet is normally spoken as “seven thousand five hundred,” while frequencies and codes are read digit by digit.
- The word “niner” is sometimes used for nine to avoid confusion, though plain “nine” is widely understood.
- Frequencies use “point” or “decimal,” for example 122.8 as “one two two point eight.”
Standard words
Each of these words has one precise meaning. Using them correctly removes ambiguity.
| Word | Meaning |
|---|---|
| Roger | I have received all of your last transmission. It does not mean yes. |
| Wilco | I have received your message, understand it, and will comply. |
| Affirmative | Yes. |
| Negative | No, or permission not granted, or that is not correct. |
| Say again | Repeat your last transmission; I did not get it. |
| Unable | I cannot comply with that instruction or request. |
| Standby | Wait, I will get back to you. It is not a clearance or approval. |
Stating altitudes and headings
Altitudes are usually given in feet, for example “climbing to five thousand five hundred.” Headings are given as three digits, so a heading of 90 degrees is spoken “heading zero niner zero” and a heading of 270 is “heading two seven zero.” Saying all three digits prevents a heading from being mistaken for an altitude or a frequency.
Plain language is fine, especially in an emergency
You do not need to know every standard phrase to be safe. If you cannot remember the exact wording, say what you mean in plain English; clarity beats jargon every time. This is doubly true in an emergency, where the FAA expects you to communicate plainly and directly rather than search for the perfect phraseology. When something is wrong, just say so.
The gear that helps
What you'll need
The radio gear and references student pilots actually use, all from PilotMall.com.
Frequently asked questions
What is the difference between “roger” and “wilco”?
“Roger” means you received the transmission. “Wilco” means you received it, understand it, and will comply. Roger alone does not promise any action.
Does “roger” mean yes?
No. “Roger” only means your message was received. To say yes, use “affirmative.”
How do I say a heading on the radio?
As three digits. A heading of 90 degrees is “zero niner zero” and 270 is “two seven zero,” which keeps it from being confused with an altitude or frequency.
Do I have to use exact phraseology in an emergency?
No. In an emergency the FAA expects plain, direct communication. Say what is wrong and what you need in everyday words; clarity matters more than perfect phrasing.