passive air defense

passive electronically scanned array (PESA) / passive phased array

passive defense measure

passive antimissile defense

passive defense

passive defense officer

Air Force Air Defense Command

heat passive homing guidance system

image-intensifying Passive Driving Periscope (PDP)

passive

passive armor

passive counterintelligence measures

passive deception measures

passive defence

passive defenseequipment

passive defenses

passive detector

passive deterrents

passive electronic countermeasures

passive electronic protective measures

passive flight

passive homing

passive homing system

passive jamming

passive muzzle brake

passive obstacle

passive public information policy

passive sonar

passive-tracking monitoring station

personal passive protection equipment

passive electronic homing head

passive phase of a trajectory

passive direction finding (PDF)