What Is SOS in Morse Code

If there’s one thing worth mastering when learning Morse code, it’s how to signal an SOS or recognize it when someone else does. In this SOS Morse Code guide, we’ll show you exactly what this looks like in Morse code, how to pronounce it, as well as how to practice sending it with the correct rhythm.

SOS Morse Code

SOS in Morse code is represented as: … / — / …

Breaking it down by each letter, we would get the following:

  • S = … (three dots/dits)
  • O = — (three dashes/dahs)
  • S = … (three dots/dits)

When pronouncing “SOS” in Morse code, you would say: “di-di-dit dah-dah-dah di-di-dit”. Note that in Morse code, we say “dit” instead of “di” for the final dot in a letter to signal that the letter is finished.

Did you know: SOS doesn’t actually stand for “Save Our Souls” or “Save Our Ship” as commonly believed. It was chosen as the international distress signal simply because the pattern (… — …) is unmistakable and hard to confuse with any other signal.

How to Send SOS in Morse Code

To become proficient in sending “SOS” in Morse code, you’ll need to:

  1. Memorize the pattern of three dots, three dashes, three dots
  2. Practice the rhythm to keep the spacing and pacing consistent
  3. Practice regularly at a slow pace to build accuracy and gradually increase your speed
  4. Test yourself by sending or decoding the message without looking at the pattern

Remember that you’ll need to follow the correct Morse code rhythm to make your message clear:

  • Short pause between each dot or dash (about 1 second when practicing)
  • Slightly longer pause between letters (about 3 seconds)
  • Full pause between words (about 7 seconds)

Keep in mind that the above numbers are supposed to demonstrate the correct ratio that you’ll need to use, as the actual duration in seconds will depend on your sending speed. What matters is maintaining the proper 1:3:7 ratio regardless of how fast or slow you’re transmitting.

When to Use the SOS Signal 

The SOS signal should only be used in genuine emergencies where immediate help is needed. These could include:

  1. Life-threatening emergencies: When you or someone else is in immediate danger
  2. Medical emergencies: When urgent medical assistance is required
  3. Natural disasters: During floods, earthquakes, or other catastrophic events
  4. Stranded situations: When lost or stranded without other communication methods
  5. Critical equipment failures: On vessels or aircraft with critical systems failures

Note: This signal should only be used in real emergencies when lives are at risk. In the United States, transmitting a false SOS signal is a federal offense under 47 U.S. Code § 325 and can result in fines of up to $10,000 and up to one year in prison.

Different Ways to Signal Morse Code

Morse code can be transmitted through many types of signals, as long as the rhythm of dots and dashes (short and long signals) is preserved. For example, the SOS signal (… — …) can be communicated through:

  • Sound: Tap, knock, whistle, or beep to create three short sounds, three long sounds, and three short sounds again.
  • Light: Use a flashlight, headlamp, or mirror to flash three quick bursts (dots), three long flashes (dashes), and three quick bursts.
  • Radio: Transmit the Morse pattern using short and long tones on a continuous wave (CW) frequency. This is the most standardized method in emergency communications.
  • Visual displays: Arrange rocks, branches, or contrasting objects on the ground in the … — … pattern. You can also write the dots and dashes in sand, snow, or with chalk.
  • Body movement or flags: Use repeated arm or flag motions to mimic the dot-dot-dot, dash-dash-dash, dot-dot-dot pattern. This can work when visibility is high but sound is ineffective.

Interested in giving it a go? You can use our Interactive Learning Tool to learn how to send and recognize Morse code in real time. If you want to convert another message or need the exact code for a specific phrase, you can also use our Morse Code Translator.

SOS Morse Code FAQs  

How do you say SOS in Morse code?

SOS is written in Morse code as … — … (three dots, three dashes, three dots). It’s pronounced as “di-di-dit dah-dah-dah di-di-dit”, with each “dit” representing a short signal (dot) and each “dah” a long signal (dash), spoken with clear and consistent rhythm.

Interested in finding out more? You can have a look at our How to Learn Morse Code guide.

To blink SOS in Morse code, you’ll need to blink three times quickly for the dots, three times slowly for the dashes, and three times quickly again for the final dots. 

The full pattern is: blink-blink-blink, long blink–long blink–long blink, blink-blink-blink, with brief pauses between each group to keep the rhythm clear.

Does SOS mean “save our souls”?

No, that’s a common misconception. SOS doesn’t stand for “save our souls” or “save our ship”— those are just popular backronyms. 

The signal was never meant to represent any phrase and was chosen simply because the Morse code pattern is quick to send, easy to recognize, and hard to misinterpret.

Is it illegal to send a false SOS signal?

Yes, sending a false SOS signal is illegal and considered a serious offense. 

In the United States, it can result in fines of up to $10,000 and up to one year in prison under federal law (47 U.S. Code § 325), especially if it causes emergency services to respond unnecessarily.