What Is U in Morse Code?
The Morse code for U is ..-, a sequence of 2 dots and 1 dash. In international Morse code (the ITU standard), each letter has a unique combination of dots (·) and dashes (−). U is the reverse of D (-..).
When you hear or read “morse code u”, “morse code for u”, “u morse code”, or “letter u in morse code”, the answer is always the same 3-signal pattern: ..-.
NATO Phonetic Word for U
In the NATO phonetic alphabet, the letter U is spoken as Uniform. This pairing — Morse code ..- with the spoken word Uniform — is used by aviation, military, and amateur radio operators worldwide for unmistakable communication.
Practice: What Is the Morse Code for U?
Select the correct Morse code for U:
How to Tap Letter U in Morse Code
To transmit Letter U (..-), 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 U in Morse Code
U for "you-are-UP" — di-di-DAH.
NATO phonetic word: Uniform — pair the spoken word with the rhythm to remember faster.
Frequently Asked Questions — Letter U in Morse Code
U in Morse code is ..-. The letter U uses 2 dots and 1 dash, the standard ITU pattern.
The Morse code for U is ..-. Tap the 3 signals in sequence with a one-unit gap between each.
To send letter U: short press, then short press, then long press. The NATO phonetic name for U is Uniform.
..- means the letter U in international Morse code (the ITU standard used worldwide for amateur radio and communication).
The NATO phonetic alphabet word for U is Uniform. It pairs with the Morse code ..- for clear voice and signal communication.
Related Morse Code Letters
Other letters often learned alongside U: