What is the airspace of defined dimensions within which multiple air defense systems (surface-to-air missiles and aircraft) are simultaneously employed to engage air threats?

• A. JEZ joint engagement zone
• B. HIDACZ high-density airspace control zone
• C. BDZ Base defense zone
• D. SAAFR standard-use Army aircraft flight route

Answer: (A)

This item is about a defined airspace where several air defense systems work together to engage threats at the same time. That coordinated area is the Joint Engagement Zone. In a JEZ, sensors and weapons from multiple platforms—such as different surface-to-air systems—are synchronized to prosecute an air threat, sometimes beyond the reach of any single system, to improve kill probability and deconflict firing solutions. The other terms refer to different concepts: a High-Density Airspace Control Zone manages and deconflicts many aircraft and defense assets in busy airspace, a Base Defense Zone surrounds a facility for protection, and a Standard-use Army Aircraft Flight Route is a planned route for aircraft—none of which describe the specific joint, multi-system engagement area described by JEZ.