page_title: Countermeasure
hierarchical_section_title: Countermeasure
caption_attribution_description: English: A CH-46 Sea Knight helicopter from Marine Medium Helicopter Squadron 268 launches flares over Al Taqqadum, Iraq, February 24, 2008. HMM-268 is deployed with Multi National Force - West in support of Operation Iraqi Freedom in the Al Anbar province of Iraq.
context_page_description: A countermeasure is a measure or action taken to counter or offset another one. As a general concept it implies precision, and is any technological or tactical solution or system designed to prevent an undesirable outcome in the process. The first known use of the term is in 1923.
  Countermeasures can refer to the following disciplinary spectrum:
  Defense
  Medicine
  Materials engineering
  Electro-magnetic engineering
  Policing
  Information technology
  Law
  Diplomatic security
  Pollution prevention
  Defense countermeasures are often subdivided into "active" and "passive" countermeasures.
context_section_description: A countermeasure is a measure or action taken to counter or offset another one. As a general concept it implies precision, and is any technological or tactical solution or system (often for a military application) designed to prevent an undesirable outcome in the process. The first known use of the term is in 1923.
  Countermeasures can refer to the following disciplinary spectrum:
  Defense
  Medicine
  Materials engineering
  Electro-magnetic engineering
  Policing
  Information technology
  Law
  Diplomatic security
  Pollution prevention
  Defense countermeasures are often subdivided into "active" and "passive" countermeasures.
caption: A CH-46 Sea Knight helicopter launches countermeasures (flares and chaff)
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