SOS in Morse Code SOS in Morse code is ... --- ... : three dots, three dashes, three dots. It is the international distress signal, sent as one continuous sequence, and it is easy to recognise by sound. How to remember it Listen for the rhythm: dit-dit-dit, dah-dah-dah, dit-dit-dit. The fastest way to learn any Morse code is by sound, not by counting dots on paper. Type a word, listen to it, and repeat it until the sound itself means the letter. Hear it yourself Learn Morse code with sound at Morse Code Works: https://morsecodeworks.com/