I just received a text message, and there will be a provincial air defense alarm trial tomorrow. What does this mean? Does everyone understand?

This means an empty alarm test. Generally speaking, thinking of this alarm is an emergency, just to prevent it in advance.

As an important part of urban civil air defense projects, it is usually used for disaster prediction and emergency notification in emergency rescue and disaster relief and sudden accidents, and is used for civil air defense in wartime. It is the basic means for people's governments at all levels to carry out civil air defense command and organize personnel evacuation, and it is an alarm to remind people to pay attention to air defense when the city is threatened by air strikes.

Extended data air defense alarm release mainly uses audio alarm and other standard equipment. In wartime, communication, radio and television systems must give priority to transmitting and distributing air defense warning signals, and auxiliary means such as whistle, horn, bell and gong can also be used. According to different positions, acoustic alarms are divided into fixed and mobile; According to the energy conversion mode, it can be divided into electric type, electroacoustic type, pneumatic type and manual type.

Air defense warning facilities must be kept in good working condition, and the release and transmission of alarms should be fast and accurate, and synchronized by various means; Strengthen communication with superiors and subordinates and friends and neighbors, receive air raid information at any time, strengthen observation of air targets, and report air raid information in time; According to the air raid situation and duration, timely issue early warning signals.

With the sudden increase of air strikes, the increase of attack means and the expansion of destructive power, the importance of air defense warning has been paid more and more attention, and higher requirements have been put forward for the accuracy, timeliness and continuous distribution ability of air defense warning. With the construction and improvement of communication and network, the distribution methods of air defense warning will be more flexible and diverse.