R in Morse Code — ·−·
What is R in Morse Code?
The letter R in Morse code is dot-dash-dot (· − ·). Its alternating short-long-short pattern creates a balanced rhythm. In radio communication, R alone means "received" or "roger."
In International Morse Code, the letter R is encoded as ·−· — consisting of 2 dots and 1 dash. The total transmission length is 7 time units. In the NATO phonetic alphabet, R is represented by the word "Romeo" to avoid miscommunication over radio.
How to Transmit R in Morse Code
To transmit the letter R (·−·) in Morse code, follow these steps:
- Send a short signal (dot) — 1 time unit then pause for 1 unit
- Send a long signal (dash) — 3 time units then pause for 1 unit
- Send a short signal (dot) — 1 time unit
At 20 WPM (words per minute), one time unit equals 60 milliseconds. So the letter R takes approximately 420ms to transmit at this speed.
Visual Signal Pattern
Mnemonic: How to Remember R in Morse Code
R is "di-DAH-dit" — like the word "roTAte" with emphasis on the middle. The dot-dash-dot pattern also visually looks like the bumps on the letter R.
Example Words with R in Morse Code
Here are common words containing the letter R, with their complete Morse code breakdown:
Interesting Fact About R in Morse Code
In early radio communication, the letter R was sent to acknowledge receipt of a message — this is the origin of the word "Roger" meaning "received and understood" in aviation and military communication.
Letter R Frequency in English
The letter R appears in approximately 6.0% of English text, making it the #9 most common letter out of 26.
Because R is highly frequent, Morse code assigns it a relatively short code (3 elements) to keep transmissions efficient. This design principle — shorter codes for common letters — is the foundation of Morse code's efficiency.
Common English Words Starting with R
Practice encoding these common words that begin with the letter R:
Letters Similar to R in Morse Code
These letters have Morse code patterns related to R — knowing them helps avoid confusion:
Complete Guide to R (·−·) in Morse Code
The Morse code representation for the letter R is ·−·, which is vocalized as "di-dah-dit". This encoding is part of the International Morse Code standard adopted in 1865 and still in use worldwide today.
When transmitting R by sound, the dots should be short, crisp signals and the dash should last exactly three times the duration of a dot. Proper timing between elements (1 unit of silence) is crucial for the receiver to correctly decode the letter.
In practical use, the letter R can be transmitted using various methods: a telegraph key, a radio transmitter, a flashlight (short flash = dot, long flash = dash), a whistle, or even by tapping. The medium doesn't matter — only the relative timing between short and long signals.
For amateur radio operators using CW (Continuous Wave) mode, the letter R is one of the most frequently transmitted characters, appearing in countless common words and abbreviations.
Frequently Asked Questions About R in Morse Code
What is the letter R in Morse code?
The letter R in Morse code is · − · (dot dash dot), pronounced "di-dah-dit". It has a short signal, a long signal, then another short signal.
Why does "Roger" mean received in radio?
The letter R was used to acknowledge receipt of a message in early radio. "Roger" was the phonetic word for R, so saying "Roger" became synonymous with "received and understood."
How do you remember R in Morse code?
Think "roTAte" — the emphasis on the middle syllable matches the dash in the middle. Or think di-DAH-dit as a bouncing rhythm.
What is the NATO phonetic for the letter R?
The NATO phonetic alphabet word for R is "Romeo". It is used internationally in radio communications to identify the letter R clearly.
Translate R and More
Use our free Morse code translator to convert the letter R, full words, and sentences to Morse code instantly.