Aviation / FAA Alphabet
How the FAA applies the ICAO standard in US airspace, including phraseology for pilots and ATC.
The ICAO/ITU radiotelephony spelling alphabet — the international standard since 1956.
e.g. "Smith" → Sierra · Mike · India · Tango · Hotel
| Letter | Code Word | Pronunciation | Morse | Copy |
|---|---|---|---|---|
| A | Alfa | AL-fah | ·− | |
| B | Bravo | BRAH-voh | −··· | |
| C | Charlie | CHAR-lee | −·−· | |
| D | Delta | DELL-tah | −·· | |
| E | Echo | ECK-oh | · | |
| F | Foxtrot | FOKS-trot | ··−· | |
| G | Golf | GOLF | −−· | |
| H | Hotel | hoh-TELL | ···· | |
| I | India | IN-dee-ah | ·· | |
| J | Juliett | JEW-lee-ETT | ·−−− | |
| K | Kilo | KEY-loh | −·− | |
| L | Lima | LEE-mah | ·−·· | |
| M | Mike | MIKE | −− | |
| N | November | no-VEM-ber | −· | |
| O | Oscar | OSS-cah | −−− | |
| P | Papa | pah-PAH | ·−−· | |
| Q | Quebec | keh-BECK | −−·− | |
| R | Romeo | ROW-me-oh | ·−· | |
| S | Sierra | see-AIR-rah | ··· | |
| T | Tango | TANG-go | − | |
| U | Uniform | YOU-nee-form | ··− | |
| V | Victor | VIK-tah | ···− | |
| W | Whiskey | WISS-key | ·−− | |
| X | X-ray | ECKS-ray | −··− | |
| Y | Yankee | YANG-key | −·−− | |
| Z | Zulu | ZOO-loo | −−·· |
| Digit | Pronunciation |
|---|---|
| 0 | ZE-RO |
| 1 | WUN |
| 2 | TOO |
| 3 | TREE |
| 4 | FOW-ER |
| 5 | FIFE |
| 6 | SIX |
| 7 | SEV-EN |
| 8 | AIT |
| 9 | NIN-ER |
How the FAA applies the ICAO standard in US airspace, including phraseology for pilots and ATC.
The APCO radiotelephony alphabet used by US law enforcement — Adam, Boy, Charles — and how it differs from NATO.
Branch-specific usage across NATO forces, STANAG 7085, and tactical brevity codes.
Complete International Morse Code reference — dots, dashes, and timing for every letter, number, and prosign.
The full International Phonetic Alphabet chart — consonants, vowels, diacritics, and suprasegmentals.
All IPA vowel symbols with audio examples, tongue position diagrams, and usage in English.
Pulmonic and non-pulmonic consonants — place, manner, and voicing in the IPA framework.
Instantly convert any text to NATO, APCO, or custom phonetic alphabets. Copy, print, or share the result.
How linguists, the US Air Force, and ICAO tested thousands of words across 31 nations to build the alphabet we use today.
The wartime split between "Able Baker" and "Affirm Beer" — and why unification took over a decade.
The deliberate spelling choices made to ensure cross-language clarity — from "Alfa" (no ph) to "Juliett" (double T).
Hailing on Channel 16, MAYDAY format, position spelling, and DSC — the procedural side of phonetics at sea.
Call-sign spelling, contesting etiquette, and the cultural rule on when non-standard phonetics are tolerated.
NATO words versus "B as in Boy" — when each fits, and how to spell email addresses across accents.
A one-week practice schedule, the letter pairs new learners reliably mix up, and how to test recall in both directions.
Why ICAO says TREE, FIFE, FOW-ER, NIN-ER — and where these digit forms become mandatory.
The NATO phonetic alphabet is a standardized set of 26 code words — Alfa, Bravo, Charlie, and so on — used to spell out letters unambiguously over radio and telephone. Formally designated the ICAO/ITU Radiotelephony Spelling Alphabet, it was adopted in 1956 and remains the global standard for aviation, military, maritime, emergency services, and telecommunications.
The spelling Alfa was chosen because "ph" is not universally pronounced as /f/ in all languages. By using "f" directly, ICAO ensured correct pronunciation across all language backgrounds.
French speakers commonly drop a final silent consonant. A single "t" in Juliet could be swallowed, making it sound like Julie. The double "t" forces clear pronunciation of the ending, preventing confusion over noisy channels.
No. The NATO phonetic alphabet is a spelling alphabet (code words for letters). The International Phonetic Alphabet (IPA) is a system of symbols representing speech sounds. They serve entirely different purposes. See the full IPA chart →
Not always. Many US law enforcement agencies use the APCO phonetic alphabet (Adam, Boy, Charles…), though NATO/ICAO is gaining adoption. Compare them here →
Last reviewed on 2 May 2026.