Warning system

Source: Wikipedia, the free encyclopedia.
A HSS Engineering TWS 295 electronic sirens warning Civil Defense siren.
civil protection throughout Switzerland. They are tested once a year, on the first Wednesday in February.[1] Sound sample
Warning light indicating danger of laser exposure

Warning system is any system of biological or technical nature deployed by an individual or group to inform of a future danger. Its purpose is to enable the deployer of the warning system to prepare for the danger and act accordingly to mitigate or avoid it.

Warnings cannot be effective unless people react to them. People are more likely to ignore a system that regularly produces false warnings (the

better source needed
]

Early warning siren for earthquakes and floods

Biological warning systems

Man-made warning systems

Civilian warning systems

fire alarm that warns people if a building is on fire

Military warning systems

Historical beacon-based systems:

  • Asia Minor
    during the 9th century

Space-based missile early warning systems:

Airborne early warning systems:

Ground-based

early warning radar systems
:

Optical sensors:

Emergency broadcasting:

See also

Notes and references

  1. ^ Testing sirens, Swiss Federal Office for Civil Protection (page visited on 7 September 2013).
  2. ISSN 0951-8320. Archived from the original
    (PDF) on 2018-02-07. Retrieved 2018-02-07.
  3. TheGuardian.com
    . 30 May 2012.
  4. ^ [1] Archived December 12, 2006, at the Wayback Machine