ICAO Phonetic Alphabet Quiz

A misheard letter can change a name or an aircraft identifier. Saying Bravo for B and Delta for D gives the listener distinct words instead of short letter names that may be confused. The International Civil Aviation Organization (ICAO) spelling alphabet supplies an agreed word for each of the 26 Latin letters from A to Z.

The same letter–word associations are widely known as the North Atlantic Treaty Organization (NATO) phonetic alphabet. Despite the familiar name, this is a spelling alphabet rather than a system for transcribing speech sounds. Each complete codeword represents one written letter. November means N in a spelling sequence, regardless of its ordinary meaning as a month.

For example, the name JANE becomes Juliett, Alfa, November, Echo. A sender works from letters to words; a receiver recovers J, A, N and E in the same order. Nothing translates the name or changes its spelling. The words provide a shared way to communicate its letters.

That shared vocabulary matters when spelling an unfamiliar name, clarifying a reference or identifying letters in radio communication. Substituting a familiar word of your own removes the consistency that the standard provides. The full codeword matters, not merely a similar sound or a word beginning with the right letter.

• Alfa uses an f, rather than the ph in Alpha.
• Juliett ends with two t letters, rather than the single t in Juliet.
• Whiskey includes an e, and X-Ray represents just X despite its hyphen.

Letter recognition, clear pronunciation and accurate listening are different skills. Recognizing words on a printed list does not demonstrate that someone can say them intelligibly, hear them through interference or follow radio procedures. In aviation, the alphabet supports the applicable communication procedure; knowing its words is not a substitute for training in that procedure.

How to Use This Tool:

The quiz uses original, unofficial multiple-choice questions. Start with a short round for a sample of letters, or choose 26 questions to cover every letter in one direction.

1. Choose Direction and Question count. Letter → spelling word asks for the word matching a letter; Spelling word → letter reverses the task. Counts are 5, 10, 15, 20 or 26. The default is 10 letter-to-word questions.
2. Select Feedback. The default, After each answer, reveals correctness and an explanation as you go. At the end records each choice but withholds corrections until the completed review.
3. Set an optional Replay seed under Advanced. A seed is text used to reproduce the question selection and option order. Leaving it blank uses a fixed default round, not a newly randomized round each time. Use no more than 128 characters. If a seed-length notice appears, shorten the value to use your own seed; otherwise the default is used.
4. Select Start practice and choose one of the four displayed answers. Choosing an option records it immediately and locks that answer for the attempt. There is no separate answer submission or typed-response field.
5. Use Next question after each recorded answer, then View results after the last one. Every question needs an answer before a final review is available. Change setup clears the current attempt rather than pausing it for later editing.

Interpreting Results:

During practice, Practice status counts recorded answers, not correct answers. The progress bar measures completion. After the round, the headline changes to correct answers out of the round total. A result of 10/10 covers those ten questions, not all 26 letters.

Use Missed answer review to compare your selections with the correct associations and explanations. The Answer ledger includes the whole round. Because the words and options are printed, their initial letters can provide clues; a correct selection does not prove that you could produce the codeword without choices or recognize it by ear.

Alphabet-group recall shows counts of correct and missed answers for A–F, G–L, M–R and S–Z. Short rounds need not include equal numbers from each group, so a longer bar can simply mean more questions were asked there. Unasked letters are not assessed. Any suggested review focus uses the group with the most misses in this round, not a general proficiency ranking.

Retry missed starts a separate attempt containing only wrong answers, even when there was just one. It is absent after a perfect round. Replay same seed repeats the current challenge, including option order. Try a new seed changes the seed but can repeat questions. To return from a missed-only retry to a normal alphabet round, choose Change setup.

Perfect round means that no selected question was missed. There is no official pass mark, certification or exam-readiness judgment. For actual radio use, check pronunciation and follow the procedures and training applicable to the operation and jurisdiction.

Technical Details:

The 26 letter–word pairs are fixed. Reversing the lookup uses the same associations, so both directions can be checked against one reference. The mapping below preserves the listed word spellings.

Letter–word mapping

Coverage, selection and replay

The question bank contains 52 directional prompts: one letter-to-word question and one word-to-letter question for each association. A round draws from the 26 prompts in the chosen direction; there is no combined 52-question round. The questions test only written A–Z letter–word associations. Digits, listening, spoken-pronunciation assessment and operational radio phraseology are not tested. The question reference records a check of the letter table on 11 September 2026.

Questions are selected without replacement, so the same letter does not recur within a normal round. Each question has one correct answer and three fixed alternatives, with their positions arranged by the seed. Changing the seed can change the sampled questions and their order, but it does not create new associations or change the answer key. At 26 questions, every seed still covers the same 26 letters: six each from A–F, G–L and M–R, and eight from S–Z.

Reproducing a challenge requires the same direction, question count, feedback setting, seed and question-bank version, as well as the same set of eligible questions. For a missed-only retry, that eligible set is restricted to the previous misses. Feedback timing changes when corrections are visible, not how answers earn points.

Points, accuracy and progress

Every correct choice earns one point and every wrong choice earns zero. Total points equal the number correct and range from zero to the number of questions selected. There is no partial credit, weighting or deduction for a wrong answer.

Accuracy measures correct answers against the whole selected round. Here, C is the number correct and N is the round's question count.

Progress measures how much of the round has been answered, regardless of correctness. A is the number of recorded answers, and the denominator is the same N. All three counts are integers with 0 ≤ C ≤ A ≤ N and N greater than zero.

Both percentages keep all selected questions in the denominator, including unanswered ones. With ten questions selected, three recorded answers containing two correct choices give 20% accuracy and 30% progress. Seven questions remain unanswered, not incorrect. The visible progress label rounds to the nearest whole percent, with half-percent ties upward. Calculated accuracy retains its unrounded ratio; the completed headline shows the exact correct count out of the selected total.

Privacy Notes:

Scoring happens in your browser, but the page address carries the round settings, seed, recorded choices and current position, including partially completed attempts. Someone receiving that address can restore those choices when the saved attempt is compatible, rather than receiving only a blank practice round.

Keep sensitive information out of Replay seed. Addresses may enter browser history or be transmitted when loaded or shared. Change setup clears the active attempt and its current address state; it cannot erase previously shared copies. The address is not encrypted progress storage, and there is no account-based progress record in this quiz.

The chart loads an external resource when needed, so browser scoring is not a promise of offline use or no network activity. It also does not establish site-wide logging or retention practices.

If Saved attempt unavailable appears, the stored round could not be restored, for example because it is incompatible or invalid. Start a new round from the setup choices instead of treating the missing result as a score of zero.

Worked Examples:

References:

• General Phraseology, section 2-3-3 and Table 2-3-2: ICAO Phonetics – Individual Letters, Federal Aviation Administration.
• The NATO Phonetic Alphabet, North Atlantic Treaty Organization.