The Chinese translation of SOS is "emergency help".
SOS was originally born because international maritime communication needs an easy-to-understand emergency signal. The symbol S represents an acute emergency, the symbol O represents the organization responsible for operating radio equipment, and the symbol S represents an urgent need for help or distress. SOS has applications in different fields. In addition to maritime communication, SOS is also widely used in other fields, such as aviation, fire, medical care and so on.
On various occasions, SOS is regarded as an important emergency signal, which can effectively transmit distress information to the outside world and help people get timely assistance. When using SOS signals, you need to pay attention to the way the signals are sent. In maritime communication, emergency signals can be sent by radio, flashing lights and other means.
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In outdoor activities, you can use flutes or similar tools to send out emergency signals. Generally speaking, the way of sending SOS signals should be as clear and concise as possible in order to attract the attention of people around. When using SOS signals, we need to pay attention to the following points: First, we must confirm that we are in an emergency, not misuse SOS signals.
secondly, it is necessary to specify a clear recipient or use occasion. Finally, you need to wait patiently for the arrival of rescuers after sending the signal. At the same time, everyone should always pay attention to how to use SOS signals correctly so as to get timely assistance in an emergency.
signals are physical quantities that represent messages. For example, electrical signals can represent different messages through changes in amplitude, frequency and phase. This kind of electric signal can be divided into analog signal and digital signal. Signal is a tool to carry messages and a carrier of messages.
broadly speaking, it includes optical signals, acoustic signals and electrical signals. According to the actual use, signals include TV signals, broadcast signals, radar signals, communication signals, etc. According to the time characteristics, there are deterministic signals and random signals.