One signal, rather than three separate letters
SOS uses the patterns for S, O, and S, sent continuously. There is a one-unit gap between every dot and dash, including where the letters meet. This page joins SOS into that pattern when your message is exactly SOS. Other messages use normal letter spacing.
How to recognize the rhythm
Count three short sounds, three longer sounds, and three short sounds again. Each long sound lasts three times as long as a short one. The continuous pattern lasts 23 dot units, or 1.38 seconds at 20 WPM, without a trailing pause.
Practicing safely
This browser tool is for learning and creating files. It does not contact emergency services or transmit a radio distress call. In an emergency, contact the appropriate local emergency service using an available communication method.
To learn other patterns, open the Morse alphabet. To understand their timing, read the dots, dashes, and pauses guide.