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A complete set of air raid alarms. The air raid warning comes in three types: [21] Pre-raid warning: a 36-second high tone followed by a 24-second low tone, with three cycles per period. This warning signifies an air raid is likely about to take place. Raid warning: a six-second high-tone followed by a six-second low tone, with 15 cycles per ...
Air Raid Precautions (ARP) refers to a number of organisations and guidelines in the United Kingdom dedicated to the protection of civilians from the danger of air raids. Government consideration for air raid precautions increased in the 1920s and 30s, with the Raid Wardens' Service set up in 1937 to report on bombing incidents. [ 1 ]
The A or B determines whether the motor is three phase or single phase. A 3T22A is three phase, while a 3T22B is single phase. The siren was mainly used for air raid warnings during the Cold War era and weather warnings after the war. In the early 1990s, the siren's production was stopped when it was replaced with the newer 2001-SRN, which can ...
Air raid warnings sounded throughout Ukraine on Tuesday as residents braced for more potential missile strikes after Russia targeted approximately a dozen cities in recent days. Ukrainians were ...
Air raid warnings rang out across the country, with 10 Ukrainian regions coming under fire, the country’s Interior Minister, Ihor Klymenko, said. Russia has escalated its attacks on Ukraine in ...
A British air raid siren from the Second World War. All clear is the signal, generally given by an air raid siren, which indicates that an air raid or other hazard has finished and that it is safe for civilians to leave their shelters; it is commonly used in radios as well.
The air raid warnings and defences were activated across the country. There were impacts in several regions, including the city of Chernihiv in northern Ukraine and Dnipro in the east.
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