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Fireworks signal
Three sets of fired flames are internationally used for distress signals. The fire piles are put into triangles. The interval between each pile is equal and ideal. This arrangement is also convenient to ignite. If fuel is scarce or if oneself is seriously injured, or because of hunger and excessive weakness, there is not enough to get three piles of flames.
Remember, sometimes it is not possible to let all signal fires burn for a whole day. In this case, you should be ready at all times to keep the fuel dry. Once any plane passes by, it will be ignited as soon as possible.
The fuel of the fire should be easy to burn, and it should be able to burn quickly after it is ignited. Because some opportunities are fleeting, birch bark is an ideal fuel. Gasoline can be used if conditional, but petrol should not be dumped on the fire, wicked with some fabrics, soaked in gasoline, then placed on the fuel heap, and the petrol tank moved to a safe place and then ignited. The fire will go out When adding gasoline, be sure to add it to the fuel without sparks or embers, otherwise the deflagrating flame will hurt itself.
During the day, smoke is a good locator. Adding some green grass, leaves, moss, and ferns to the fire will produce smoke. When the smoke rises, it will make a strong contrast with the surrounding environment and it will be easily noticed. In fact, any damp thing produces smoke. The damp mats and seat cushions can be burnt for a long time. At the same time, it is difficult for flying insects to approach wounds. Put some dry wood at night so that the fire will burn and the fire will rise.
In addition, black smoke is most noticeable in snow or desert, rubber and gasoline can produce black smoke.
If the weather conditions are limited, the smoke can only float near the surface and can increase the fire. As a result, the warm air flow will rise more rapidly and will carry smoke to a considerable height.
Physical signal
When the search aircraft is near, both hands wield clothing with greater contrast with the surrounding environment, expressing the meaning of distress.
Semaphore signal
A flag or a brightly colored cloth is attached to a wooden stick. When holding a rod, a long stroke is made on the left side and a short stroke is made on the right side. This increases the range of motion and makes the “8†motion.
If the two parties are closer together, it is not necessary to do "8"-shaped movement. A simple stroke can be done, with a long stroke on the left and a short stroke on the right. The former should be slightly longer than the latter.
Sound signal
If you are close to each other, you can shout out loud or hit the tree trunk with a wooden stick. The effect of the lifeguard whistle can be more pronounced. Three sounds are short, three long, and three short sounds. Repeat after one minute.
Reflective signal
Use sunlight and a mirror to emit signal light. Any bright material can be used, such as can lids, glass, and a piece of metal platinum. Of course, a mirror is more ideal. The continuous reflection will regularly produce a long line and a dot, which is a kind of Morse code. Even if you do not understand Morse code, feel free to reflect, it may also attract people's attention. In any case, at least the SOS code should be mastered.
Even if you are far away, you can perceive a reflected light signal. Even if you do not know where you want to contact the target, it is worth a lot of temptation, and its approach is only to do little. Take a look at the sky. If there is a plane approaching, it will quickly reflect the signal light. This light may dazzle the rescue personnel, so once it is determined that they have been discovered, the light should be stopped immediately.
Ground sign signal
Ground signs can be made on relatively open ground, such as grass, beaches, and snow. Such as the grass cut into a certain logo, or stamped on the snow for help sign, you can also use branches, seaweed and other spell signs, contact with the air. It is also possible to use the symbol of the ground-based liaison symbol provided by the International Civil Aviation Regulations. Remember these words: SOS (Help), SEND, DOCTOR, HELP, INJURY, TRAPPED, LOST, WATER.
Leave a message
When leaving a dangerous place, leave some signal to prepare for rescue personnel to find out. Ground signals allow the rescuer to know where you are or where you were in the past. Directional indicators help them find your path. Along the way, there must be a continuous indicator. This will not only allow the rescuers to follow and will not be lost if they wish to return. If they lose their way and cannot find the route they want to follow, it can become a guide.
Direction indicators include:
1. Shake the rock or chipped stone into an arrow.
2. Support the rods between the tree trunks, with the top pointing in the direction of the action.
3. The middle and upper parts of the roll grass are tied up so that the top end bends to indicate the direction of movement.
4. Place a forked branch on the ground and use the bifurcation to point in the direction of movement.
5. Use small stones to build a large stone pile, and put a small stone on the side to point in the direction of action.
6. Use an arrow-shaped groove deep in the trunk to indicate the direction of the action.
7. Two crossed wooden sticks or stones mean that this road is blocked.
8. The signal conveyed by three rocks, sticks or bushes has a clear meaning, indicating danger or emergency.
When you are in distress, you need to get in touch with people in various ways. The signal sent is enough to get people's attention. At the same time, different distress signals should be issued according to their own circumstances and the surrounding environmental conditions. In general, three repetitions of the operation symbolize the search for assistance.