Knowra Air defense Air defense Air defense comprises measures that detect, deter, or destroy hostile aircraft and missiles, combining surveillance, command systems, and defensive weapons.
Air surveillance : The continuous observation of airspace to detect and track aircraft or missiles. Surveillance supplies the warning and tracks on which air-defense decisions depend.
Airspace : The portion of the atmosphere controlled or used for aviation and other activities. Air defense operates within airspace that states monitor and regulate.
National air defense : The coordinated protection of a country's airspace and critical sites against airborne attack. It applies air-defense networks across a state's territory and infrastructure.
Electronic warfare : Military operations that use or counter electromagnetic energy to affect adversary capabilities. Jamming can disrupt threats without physically intercepting them.
Battle of Britain : The 1940 air campaign in which Britain resisted Germany's attempt to gain air superiority. Britain's radar, command network, and fighters demonstrated an integrated defensive system.
Radar : A system that uses radio waves to detect objects and estimate their range, direction, or speed. Radar commonly detects and tracks airborne threats before visual contact.
Air superiority : A degree of control over the air that lets a force operate with limited enemy interference. Air defense seeks to deny an adversary the freedom to achieve air superiority.
Ground-based air defense : Air-defense forces and weapons operated from land. Land forces use these systems to protect troops, facilities, and territory.
Passive air defense : Measures that reduce vulnerability to air attack without directly engaging the attacker. It contrasts with active air defense by emphasizing concealment, dispersal, and protection.
Strategic bombing : The use of air power to attack an enemy's war-making capacity, infrastructure, or population centers. Air defense developed partly in response to the threat of sustained bombing from the air.
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