No in Morse Code

NO in Morse — Short, Distinct, and Memorable

"NO" is one of the easiest two-letter Morse codes to remember. N is dash-dot (-·) — the negative of E, which is just a dot. O is three dashes (---) — which sounds like a long, resonant "oh." Together, -. --- is a very distinct sound: a quick negative followed by three solid dashes.

In amateur radio, single-letter N (-·) is the standard "negative" response. It's shorter than sending the full word NO, and Morse operators prioritize brevity — especially in noisy conditions where longer transmissions are more likely to have characters corrupted by interference.

The ITU phonetic alphabet equivalent of N is "November" (used in voice radio), while in Morse it's just that clean dash-dot. Many Morse beginners find N and E to be among the first characters they can reliably identify by sound — E is one dot, T is one dash, and N is the "two-element" negative pair.

For trivia: Morse code has no character for "NO" as a single symbol. It must be sent as two separate letters. Compare this to the prosigns (like AR and SK), which are multi-letter combinations sent without any inter-element spacing.