Radio · Trainer

NATO Phonetic Alphabet — trained the way it's used

A free, offline two-way trainer for the NATO/ICAO spelling alphabet. RX side: hear realistic callsigns and tail numbers spoken in phonetics through simulated radio conditions — band-limited, noisy, fading — and type what you copy. TX side: hold to talk, hear your own voice played back through the same degraded channel, then the reference.

How it works

A 36-channel mastery rail (26 letters + 10 ICAO digits, zero through niner) tracks which symbols you actually miss and drills them harder. It runs entirely in the browser and works offline.

FAQ

Why train with noise?

The alphabet exists because radio audio is degraded; Delta, Tango and Victor collapse into each other on a weak signal. Practicing on clean audio trains the easy version of the task.

Is "Alfa" a typo?

No — ICAO spells it Alfa and Juliett with two Ts, so non-English speakers pronounce them right.

Does audio leave my device?

Never. Recording uses the browser's MediaRecorder locally; there is no server and no account.