How to Signal SOS
Signal three short bursts, three long bursts, and three short bursts. You can use a flashlight, tapping, whistles, or any other method that clearly distinguishes short and long signals.
Why SOS Was Chosen
SOS was adopted because the pattern is simple, symmetrical, and easy to recognize in noisy or stressful conditions. The letters were chosen for the signal pattern, not because the abbreviation stands for a phrase.
SOS and the Titanic
The Titanic disaster helped popularize SOS globally. Wireless operators used both CQD and SOS, and the event contributed to stricter radio-watch and distress-communication rules.
Modern Uses of SOS
SOS remains widely recognized in survival training and emergency communication, even though modern maritime systems also rely on voice procedures and automated distress systems.