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For help, you might say, just bring your mobile phone with you. But we will find that when we reach a little bit away, the mobile phone has no signal, let alone almost no one's land; Or a place where the signal is good, but the nearby cell phone base station is damaged (such as an earthquake), it may also make us lose contact with the outside world only with our cell phone.We cannot adjust the electromagnetic wave power of the mobile phone by ourselves to make the signal travel farther, but for radio transceivers, we can do so. There will be dedicated radio rescue channels in various places, as well as radio enthusiasts scattered all over the world. As long as your distress signal is received by them, the chance of being rescued will be much greater.
The so-called accidental fall into danger is of course unexpected. But if it happens, it must be faced. Your life is very important. Think of those you love and those who love you far away. And maybe because you understand this, a group of people can be rescued—whether you are the person who sent the signal or the enthusiast who received the signal. So prepare in advance.
The first time an emergency occurs, it is often accompanied by the destruction of power supply, public telecommunications, road traffic and other facilities, temporary interruption of contact with the outside world, etc., casualties at the disaster site, and property losses continue. The necessary rescue force is lacking. At this time, amateur radio enthusiasts at the disaster site, the first task is to quickly set up a radio station and call for help.
The first time an emergency occurs, it is often accompanied by the destruction of power supply, public telecommunications, road traffic and other facilities, temporary interruption of contact with the outside world, etc., casualties at the disaster site, and property losses continue. The necessary rescue force is lacking. At this time, amateur radio enthusiasts at the disaster site, the first task is to quickly set up a radio station and call for help.
Before this, please make sure your amateur radio is full power, and antenna is connected well. Check the frequency is International emergency frequency 145.000MHz和433.000MHz. If you know your local emergency frequency is the best. you may get a faster rescue.