NATO phonetic alphabet

The NATO phonetic alphabet (also called the radio alphabet, spelling alphabet, or ICAO alphabet) is an oral transmission convention, not a cipher. It associates each letter with a distinct word readable in a noisy channel (HF radio, phone, walkie-talkie). Adopted by NATO and ICAO in 1956, it’s now the international standard for unambiguous spelling.

What is Alpha, Bravo, Charlie, Delta, Echo, Foxtrot…?

This is the NATO phonetic alphabet, the international radio spelling code where each letter of the alphabet is replaced by a word: A for Alpha (Alfa), B for Bravo, C for Charlie, D for Delta, E for Echo, F for Foxtrot, G for Golf, H for Hotel, I for India, J for Juliett, K for Kilo, L for Lima, M for Mike, N for November, O for Oscar, P for Papa, Q for Quebec, R for Romeo, S for Sierra, T for Tango, U for Uniform, V for Victor, W for Whiskey, X for X-ray, Y for Yankee, Z for Zulu. The 26 words were chosen specifically because they remain distinguishable when spoken over a noisy radio link.

The table

A = Alfa         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 = Juliett      W = Whiskey
K = Kilo         X = X-ray
L = Lima         Y = Yankee
M = Mike         Z = Zulu

Why exactly these words?

Each word was chosen after phonetic clarity tests across 31 languages. Criteria:

• Acoustically distinct: Alfa can’t be confused with Bravo, nor Charlie with Delta.
• Readable under noise: useful even in degraded transmissions.
• Culturally neutral: no place or person name that would shock a national language.
• Two syllables when possible, for easy scanning.

Some words (Alfa instead of Alpha, Juliett with two T’s) are deliberately respelled to be readable both in Romance and Germanic languages.

What are the variants of NATO phonetic alphabet?

• Old US Army (WWI) — Able, Baker, Charlie, Dog… replaced at NATO in 1956.
• Aeronautical alphabet — NATO-equivalent, standardized by ICAO.
• French military radio alphabet — sometimes uses given names (Anatole, Berthe…).
• Cyrillic alphabet (Russian) — Anna, Boris, Vera… local equivalent.

Why this is not encryption?

NATO is a public code. It protects nothing: anyone who knows the table (i.e. anyone with Google) decodes instantly.

Its uses are:

• Spelling proper names (reservations, confirmations, doctors).
• Transmitting a registration or code without mistakes.
• Dictating a URL or email over the phone.
• In aviation and marine, for any critical communication.