What Is A in Morse Code?
The Morse code for A is .-, a sequence of 1 dot and 1 dash. In international Morse code (the ITU standard), each letter has a unique combination of dots (·) and dashes (−). A is the most common starting letter; .- is short and easy to learn.
When you hear or read “morse code a”, “morse code for a”, “a morse code”, or “letter a in morse code”, the answer is always the same 2-signal pattern: .-.
NATO Phonetic Word for A
In the NATO phonetic alphabet, the letter A is spoken as Alfa. This pairing — Morse code .- with the spoken word Alfa — is used by aviation, military, and amateur radio operators worldwide for unmistakable communication.
History of the Letter A in Morse Code
The letter A in Morse code is .- — one dot followed by one dash. It is one of the shortest and most elegant patterns in the entire Morse alphabet, and its simplicity is no accident. Samuel Morse and his collaborator Alfred Vail designed the original Morse code in the 1830s and 1840s using a frequency-based principle: the most common letters in the English language were assigned the shortest codes.
A is the third most frequently used letter in English, appearing in roughly 8% of all written text. Assigning it the compact two-signal pattern .- was a deliberate efficiency decision — in long telegraph messages, saving even one signal per letter added up to significant time savings across thousands of words.
When the International Telecommunication Union (ITU) standardised Morse code in 1865, the pattern .- for A was carried over unchanged from Vail's original design. It has remained the same for nearly 200 years, transmitted by telegraph operators, ship radio officers, military communicators, and amateur radio enthusiasts across every continent and ocean.
Real-World Uses of A in Morse Code
The letter A appears in virtually every Morse code transmission — it is simply too common in English and most European languages to avoid. Here are specific real-world contexts where .- is sent regularly:
- Call signs: Nearly every amateur radio call sign contains an A — e.g. W1AW, VK2ABC, G4ANT — making .- one of the most transmitted letter patterns in the world
- CQ calls: The standard calling sequence "CQ CQ CQ DE [callsign]" almost always includes .- in the operator's call sign
- Q-codes: Common Q-codes like QRA (station name), QRN (static noise), and QSA (signal strength) all begin or contain the letter A
- Abbreviations: "ANT" (antenna), "AGN" (again), "ABT" (about), and "ANI" (any) are among the most used CW abbreviations, all starting with .-
- Prosigns: The prosign AR (.-.-.) signals "end of message" and contains A as its first letter
- SOS variants: The full distress call "SOS DE [callsign]" typically includes A in the station identifier
In amateur radio, the prosign AR (.- -.-.) is sent at the end of every transmitted message to indicate the transmission is complete. Because A is the first element of this prosign, every single completed Morse transmission in the world begins the end-of-message signal with .- — making it arguably the most consequential two-signal pattern in all of CW communication.
Complete Morse Code Alphabet Chart (A–Z)
Each letter in the Morse alphabet uses between one and four signals. The most common letters get the shortest codes — A (.-) uses just two signals, placing it among the most efficient letters to transmit. See where A sits in the full alphabet:
| Letter | Morse Code | Letter | Morse Code |
|---|---|---|---|
| A | .- | N | -. |
| B | -... | O | --- |
| C | -.-. | P | .--. |
| D | -.. | Q | --.- |
| E | . | R | .-. |
| F | ..-. | S | ... |
| G | --. | T | - |
| H | .... | U | ..- |
| I | .. | V | ...- |
| J | .--- | W | .-- |
| K | -.- | X | -..- |
| L | .-.. | Y | -.-- |
| M | -- | Z | --.. |
Notice that A (.-) and N (-.) are mirror images of each other — A is dot-dash, N is dash-dot. They are the shortest two-signal letter pair in the entire Morse alphabet and learning them together is one of the most efficient starting points for any new Morse student.
Practice Words Containing the Letter A
Practise .- inside real words and common Morse abbreviations. Start slowly and focus on the clean dot-dash rhythm before increasing speed:
| Word / Phrase | Morse Code |
|---|---|
| A | .- |
| ANT (antenna) | .- -. - |
| AGN (again) | .- --. -. |
| CQ CQ DE W1AW | -.-. --.- -.-. --.- -.. . .-- .---- .- .-- |
| AR (end of message) | .- -.-. |
| QRA (what is your callsign?) | --.- .-. .- |
| AMATEUR | .- -- .- - . ..- .-. |
The word AMATEUR is perfect for drilling A because it contains the letter twice — at the start and third position. Sending it at 5–10 wpm until it flows as a single fluid phrase is one of the classic beginner exercises recommended by the American Radio Relay League (ARRL) for new CW operators.
Tips for Memorising the Letter A in Morse Code
One dot, one dash — A is one of the easiest Morse letters to learn. Here are four techniques to make .- completely automatic:
- Sound word association: Say "dit-dah" aloud and link it to the letter A. Many beginners remember A as "a dash after a dot" — the word "a" itself is short, just like its code. The two-syllable chant "dit-dah" mirrors the letter name "ay" in rhythm.
- Pair it with N: A (.-) and N (-.) are exact mirror images. Practise sending .- -. .- -. in a loop. The contrast between dot-dash and dash-dot locks both letters in quickly and gives you two of the alphabet's most common letters for the price of one.
- Use real words immediately: Rather than drilling A in isolation, jump straight into words like ANT, AGN, and AMATEUR. Context-based practice is proven to build retention faster than isolated character drills, especially for short two-signal patterns.
- Listen at full speed: Use the audio player above to hear .- at your target speed from day one. The Farnsworth method — hearing characters at full speed with extra gaps between them — prevents the bad habit of counting dots and dashes, which breaks down above 10 words per minute.
Practice: What Is the Morse Code for A?
Select the correct Morse code for A:
How to Tap Letter A in Morse Code
To transmit Letter A (.-), use this sequence:
ITU Timing Rules
- Dot (·) = 1 unit
- Dash (−) = 3 units (3× longer)
- Signal gap = 1 unit
- Letter gap = 3 units
- Word gap = 7 units
Timing Reference Table
| Speed | Dot | Dash | Letter gap | Word gap |
|---|---|---|---|---|
| 5 wpm | 240ms | 720ms | 720ms | 1680ms |
| 10 wpm | 120ms | 360ms | 360ms | 840ms |
| 17 wpm (this page) | 70ms | 210ms | 210ms | 490ms |
| 20 wpm | 60ms | 180ms | 180ms | 420ms |
How to Remember Letter A in Morse Code
A-pple — short-LONG. Think "a-BOUT".
NATO phonetic word: Alfa — pair the spoken word with the rhythm to remember faster.
Frequently Asked Questions — Letter A in Morse Code
A in Morse code is .-. The letter A uses 1 dot and 1 dash, the standard ITU pattern.
The Morse code for A is .-. Tap the 2 signals in sequence with a one-unit gap between each.
To send letter A: short press, then long press. The NATO phonetic name for A is Alfa.
.- means the letter A in international Morse code (the ITU standard used worldwide for amateur radio and communication).
The NATO phonetic alphabet word for A is Alfa. It pairs with the Morse code .- for clear voice and signal communication.
Related Morse Code Letters
Other letters often learned alongside A: