U
U in Morse code
..- · dit dit dah
How to say it
Operators don’t say “dot dash” — they say dit dit dah. Saying the rhythm out loud is the quickest way to make it stick.
Mnemonic
Think: u-ni-FORM. Stressed syllables are dahs, unstressed are dits. Use it to get started, then drop it — at real speed you won’t have time to think.
Timing
2 dits and 1 dah. A dah is three times the length of a dit, with a one-dit gap between each symbol. The whole letter is 7 units long.
Where you learn it
In the Koch order DotDash uses, U is character number 5 of 40. You learn it by sound at full speed, with a new character unlocked each time you reach 90% accuracy.

Learn U and the other 39 by ear
DotDash teaches you Morse code in five minutes a day — free on iOS and Android.