D in Morse Code (-..): Sound, Timing and How to Send It

What is D in Morse code?

D in Morse code is -..: a dash, then two dots, always in that order, with a one-unit silence between each signal. ITU-R M.1677-1, the International Morse standard behind every table on this site, defines it that way, and American Morse, the older landline code, assigned D the identical dash-dot-dot, so this is one letter where the two systems agree.

Change any one signal and D becomes a different letter. Lengthen the last dot and you have sent K; add a third dot and it is B; put the dash at the end instead of the start and the receiver writes down U.

How to say D in Morse code: dah-di-dit

The D Morse code sound is spoken "dah-di-dit": one long syllable carrying the weight, then two quick ones. Operators voice dots as "di" inside a letter and "dit" when the dot is the final signal, which is why the letter ends on "dit" and not "di."

The two short syllables must be equal. If the middle one stretches, a listener hears something closer to "dah-dah-dit," which is G; if the last one stretches, the letter drifts toward K. Saying "dash dot dot" out loud is too slow to carry the rhythm at any working speed, so use the di-dah syllables from the first day.

D is pronounced "dee" in English, and the Morse pattern has nothing to do with that sound; the code is a rhythm, not a spelling. Press Play above and say "dah-di-dit" over the tone until your voice and the player land together.

How to send D in Morse code

To send D, make one long signal, then two short signals of equal length, with a short gap between each, then leave three units of silence so the next letter stands apart. The dash is three times the length of a dot, and that ratio is the whole letter.

1. By sound: key or hum one long tone, then two short ones. Hold the dash for a full three units; a clipped dash collapses D into S.
2. By light: one long flash, two brief flashes, lamp dark for a dot-length in between. A stretched final flash reads as K.
3. By tap: a knock has no length, so mark the dash with a heavier strike or a brief hold, then two quick taps. The pause after the second tap ends the letter.
4. In writing: -.. with no spaces inside the letter; letters are separated by one space and words by a slash. So DOG is written -.. --- --. and DAY is written -.. .- -.-- (see the word table below).

Nothing about D changes when it sits inside a word; the letter gap before and after it is the only thing that moves.

Morse code for D timing at different speeds

D occupies 7 units: a three-unit dash, two one-unit dots and the two one-unit silences inside the letter. Speed in words per minute is measured against PARIS, a 50-unit reference word, so a unit lasts 1200 ÷ WPM milliseconds and every row below follows from that one formula. Faster sending compresses D; the 3-1-1 proportion is fixed.

At 5 WPM the dash is a held note and the two dots after it can be counted. By 20 WPM D is over in less than half a second and arrives as a single shape, so "dah-di-dit" has to become one sound rather than three counted events. The three-unit gap that follows the letter is part of the timing too: squeeze it before an E and DE (-.. .) starts to sound like B.

How to remember D (-..)

The easiest way to remember D is the dash ladder: T is one dash, N is a dash and a dot, D is a dash and two dots. Each rung adds one dot after the same opening dash, so once T and N are in your ear, D is one step further along.

A word cue works for the first few sessions if the stresses match the signals: "DOG-is-out" lands as dah-di-dit, with the heavy first syllable as the dash. Think "one big step, two small ones" and you have the shape. Lean on the cue briefly, then drop it; the goal is to recognize the sound, not to translate a phrase every time.

Pair D with U while you practice. U is dot-dot-dash, the exact reverse, so sending -.. and ..- back to back teaches both letters in one drill and trains your ear to notice where the dash sits.

Letters confused with D

D is most often confused with B, which has one more dot, and with U, which is the same three signals in reverse. At speed, K and G are the other traps, because each shares two of D's three signals in the same positions.

Everything turns on what happens after the second dot. If the third signal is short and silence follows, you heard D; if a fourth short signal arrives, it was B; if the third signal stretches, it was K; if a dash follows the two dots, it was X.

Drill D against B and N first, because those two differ only in dot count, and the skill being trained is waiting for the gap rather than calling the letter early. U comes next, since reversing the order is a mistake that comes from reading the code on paper rather than hearing it. K and G are a sending fault more than a hearing fault: a stretched dot is all it takes.

What DE means: D in real Morse traffic

On the air, D is sent as -.. in every word that contains it, and it also opens DE, the procedural abbreviation that means "from" or "this is." A station calling CQ follows it with DE and its own call sign, so "CQ CQ DE W1AW" tells everyone listening who is calling. ITU-R M.1172 lists DE among the standard abbreviations, and ARRL operating guides use it in every example of a call.

DE is two separate letters, -.. and then a lone dot, with the normal three-unit letter gap between them. Send that gap too short and the receiver hears -..., which is B, so this is where D's timing has a cost beyond spelling.

D does not stand alone as a signal the way K or R can, so a lone -.. in a message is simply the letter D. For the full list of abbreviations that begin with D, see the Morse code abbreviations page, or paste any sequence into the Morse code meaning lookup.

Words that start with D

Single letters are easy; the gap after D only gets tested once another letter follows it. Spaces in the table mark letter gaps of three units, and a slash would mark a seven-unit word break.

DAD is a good first drill because it puts D on both sides of a single A and shows whether your letter gap survives the change of direction. DO and DOG set the single dash of D beside the three dashes of O, so your ear learns that D's dash is one note of a short letter, not the start of a long one. D also appears in two phrases that have pages of their own, with sound, timing and flash: Happy Birthday in Morse code and Goodnight in Morse code.

Practice D on Morse Beacon

The player above is the first tool: Play sound gives D at 14 WPM, Slow (8 WPM) stretches the dash into a note you can hear begin and end, and Flash sends the same timing as light. For whole words, put DOG, DAD or any D word into the Morse code translator and set the speed you train at; twenty or thirty repetitions in a short session do more for the ear than one long one.

After that, widen out. C (-.-.) and E (.) are D's alphabet neighbors, and the Morse code alphabet chart puts D, B, U, K and G on one screen for side-by-side comparison. The practice set for D quizzes you by ear, and if you send D into the audio decoder from a key or buzzer, the decoded result tells you whether your dash really ran three dots long.