How long and short is the sos distress signal?

The signal of "sos emergency call for help" is three short, three long and three short.

Sos, S.O.S, is an international Morse code rescue signal, not an abbreviation of any word. The characteristics are three short, three long and three short. Seen from above or upside down, the letter SOS is SOS. When there is a shipwreck, it is necessary to put a big "SOS" on the isolated island to wait for rescue, and the plane flying overhead can be identified immediately no matter which direction it comes from. So all you have to do is signal "three short, three long, three short", which means calling for help.

Another expression of SOS is 19 15 19. 19, 15 and 19 are the order of s, o and s in the 26 English letters respectively. The reason is that SOS distress signals are widely known. In extremely passive situations, SOS will expose the victims' distress information, so 19 15 19 is another obscure symbol for transmitting and expressing distress information.

Method of signaling

Fire: In the dark, fire is the most effective signal means. Light three fires and let them form a triangle (international distress signal) or a straight line. Each fire is about 25 yards (23 meters) apart. As long as time and circumstances permit, light them as soon as possible, and be careful not to put them out until you need them. If you are alone, it may be a little difficult to keep three fires, so protect one fire.

Smoke: smoke can be used to attract attention during the day. The international distress signal is three columns of smoke. You should try your best to distinguish the color of smoke from the surrounding background. If the background is light, use black smoke, and vice versa. If you add some green leaves, moss or water to the fire, the smoke will turn white; If you add some rubber, rags soaked in oil, etc. On the fire, the smoke will be black.