In any, even the smallest, set or set of survival, it is desirable to include a signal mirror (heliograph) or its substitute. An important area of activity in an emergency is the ability to give some kind of distress signal. And not only to those people who are probably trying to find and save you, but simply passing (passing, passing, flying) by and not even knowing about the plight you have created.
Signal mirror or heliograph in survival kits and kits, possibilities, use and application.
Of course, as a signal for help, you can use a homemade torch or aoster. Attract attention by waving your arms or screaming out loud. However, there is always the possibility that you have a cold and hoarse. You have an arm or leg injury. Around there simply may not be fuel for a fire. Or you couldn’t make fire at all. Therefore, now we will consider not methods, but means of signaling that may be included in your wearable survival kit.
Signal mirror or heliograph as a distress alert.
Industrial-made signal mirrors exist in various shapes and sizes. But as usual, your choice will primarily depend on the container capacity into which the components of your survival kit (NAZ) will be packaged. A signal mirror (heliograph) is one of the simplest and most useful devices for signaling help. Its flashes are clearly visible from a distance of up to 60 kilometers, and sometimes further..
. And the video below shows the visibility of the heliograph signal at ranges 1.1, 17.8 and 69.2 kilometers.
The more advanced signal mirror (heliograph) Safe Signal Day / Night Signal Mirror is released by MPI Outdoors. This mirror is able to give signals not only during the day in sunny weather, but also at night. In the afternoon, the side with the standard silver coating applied. At night, a patented red reflective coating applied on the other side of the mirror.
To signal such a mirror at night, it is necessary to direct the focused beam of the flashlight to the red reflective surface of the heliograph at a certain angle, which will create bright red glare, which according to the manufacturer can be seen at a distance of up to three kilometers. A common disadvantage of this signal mirror is the lack of a target hole. This greatly complicates the accuracy of signaling both day and night..
In the absence of an industrially manufactured heliograph, for signaling with a sun bunny, the following can be used: a metal plate polished on both sides to a mirror shine (the inside of the lid of the survival kit) or the bottom of a can. Foil with chocolate or candy wrappers, a piece of a life-saving bedspread, a wide polished knife blade, a CD, etc..
Simplified international distress signals.
In addition to special established international distress signals, which you may not know or forget, there are simplified distress alerts. The rescuers of almost all departments are more or less aware of them. For example, the SOS signal, universal in all respects, or any other light or sound signal repeated three times in a row at short intervals of two to three seconds.
It doesn’t matter that it will be three lights, three pillars of smoke, three loud whistles, three shots, three light flashes and so on. If only the signal was triple. It should be remembered that sound waves are distorted with distance and when transmitted through an uneven surface. Therefore, three whistles made at very short intervals can cause the illusion of sounding as one long sound.
A minute pause should be maintained between each group of signals. Three light or noise signals, one minute pause, and again three signals. The international distress signal received in the mountains looks a little different: six whistles, light flashes or waved hands per minute, then a minute pause and a repeat signal.