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What is Standard Morse Code for SOS Signals?

April 5, 2026

Quick Answer

The standard Morse code for SOS signals is three dots, three dashes, three dots: ...---...

Understanding the SOS Signal

The SOS signal, also known as the international distress signal, has been used for over a century to request assistance in emergency situations. It is a simple sequence of three dots, three dashes, and three dots, represented by the Morse code sequence …—… This signal is universally recognized and is a key component of maritime and aviation emergency protocols. When using a flashlight to send the SOS signal, it is essential to flash the sequence in a consistent and visible manner.

Flashing the SOS Signal

To flash the SOS signal, use a flashlight or any other visible light source to create a series of short and long flashes. The sequence should be flashed at a rate of about one flash per second, with a slight pause between each sequence. For example, flash three short flashes (dots) followed by a pause, then flash three long flashes (dashes) followed by a pause, and finally flash three short flashes (dots) again. It is essential to maintain a consistent flash rate and sequence to ensure the message is clearly understood by observers. A good rule of thumb is to flash the SOS signal for at least 10-15 seconds to increase visibility and ensure it is recognized.

Practical Applications of the SOS Signal

The SOS signal has numerous practical applications in emergency situations, including maritime emergencies, aviation incidents, and wilderness survival situations. It is essential to know how to use the SOS signal and to flash it correctly to request assistance. In addition to flashing the signal, it is also crucial to provide additional information, such as your location and the nature of the emergency, to ensure prompt assistance. By knowing how to flash the SOS signal and providing additional information, you can increase your chances of receiving timely assistance in emergency situations.

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