How was the air defense alarm reported?

The air defense alarm is issued from the horn in the alarm of the air defense alarm equipment.

work

The main work includes: issuing air defense warning signals, widely publicizing them, and organizing sound test drills; Issue air defense warning signals in time, issue an early warning when it is judged that the enemy may carry out air strikes, issue an air defense warning when obvious signs of enemy air strikes are found, and issue an alarm when the danger of enemy air strikes has been eliminated. Air defense alarms are usually issued in sequence. Air raid can send out air defense alarm directly in case of sudden and emergency. ?

Extended data:

In order to ensure the smooth flow of civil air defense warning, quickly and accurately transmit and distribute civil air defense warning signals, and effectively organize and direct civil air defense, the competent civil air defense departments of the state and governments at all levels are responsible for formulating the construction plan of civil air defense warning and organizing the construction and management of civil air defense warning network. Posts and telecommunications departments, military communications departments and competent departments for civil air defense shall ensure the construction of civil air defense alarms in accordance with the tasks prescribed by the state and the construction plan for civil air defense alarms.

Posts and telecommunications departments, military communications departments, and radio management agencies provide guarantees for the circuits and frequencies needed for the construction of alarm networks. No organization or individual may occupy or confuse the sound signals used for civil air defense warning. The civil air defense warning facilities set up by relevant units shall be maintained and managed by their units and shall not be dismantled without authorization.