passive detector

passive electronically scanned array (PESA) / passive phased array

leak detector / leakage detector

heat passive homing guidance system

image-intensifying Passive Driving Periscope (PDP)

passive

passive air defense

passive armor

passive counterintelligence measures

passive deception measures

passive defence

passive defense measure

passive defenseequipment

passive defenses

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)

passive mode

passive orientation and damping system

passive structural mode control