detection zone

grid zone / grid-zone

zone standard time (zone time) (ZST)

killing zone / kill zone

grid zone designation / Grid Zone Designator

grey-zone / grey zone (international relations)

hundred-per-cent zone (one-hundred-per-cent zone)

no-fire zone / no fire zone

flight restriction zone / flight restricted zone (FRZ)

ambush detection device

automated target detection, tracking, co-ordinate finding and interceptor guidance system

avoiding detection

bomb-detection device

chemical detection equipment

detection equipment

detection system

early detection

electronic detection countermeasures

electronic detection device

explosive detection

gamma-induced detection

IED detection

IED remote detection

invisible detection

low probability of detection (LPD)

magnetic anomaly detection (MAD) gear

Mobile Detection Team (MDT) (counter-narcotics)

nuclear detection sensor

radar (radio detection and ranging)

RADIAC ('radioactivity, detection, indication and computation')

radiation detection team

radio detection and ranging (radar)

radio frequency target detection