Letters · ITU International Morse Code
Morse code for S is ... — 3 signals (3 dots, 0 dashes). NATO: Sierra.
The letter S is forms half of the SOS distress signal (···). In international Morse code it is ...: short tap, then short tap, then short tap.
Whether you're learning for ham radio, aviation, survival, or personal interest — this page covers audio playback, visual display, timing guide, memory tip, and an interactive practice quiz.
Select the correct Morse code for S:
To transmit Letter S (...), use this sequence:
| Speed | Dot | Dash | Letter gap | Word gap |
|---|---|---|---|---|
| 5 wpm | 240ms | 720ms | 720ms | 1680ms |
| 10 wpm | 120ms | 360ms | 360ms | 840ms |
| 20 wpm | 60ms | 180ms | 180ms | 420ms |
S has three lines → three dots: · · ·
The Morse code for Letter S is ... — 3 dots and 0 dashes. Transmitted as: short tap, then short tap, then short tap.
To write Letter S in Morse code use .... A dot is a short signal and a dash is 3 times longer.
To tap Letter S: short tap, then short tap, then short tap. Follow ITU timing: dot=1 unit, dash=3 units, gap between signals=1 unit, gap between letters=3 units.
In international Morse code, ... stands for the letter S (NATO: Sierra). This is part of the ITU standard alphabet.
Most learners memorize Letter S (...) within minutes. Practice tip: S has three lines → three dots: · · ·.
Characters with similar Morse patterns: