triplines
Hidden alarm cords
Triplines are wires or cords stretched low across a path, designed to trip someone who walks into them or to trigger an alarm or trap when disturbed.
The term extends to any mechanism that detects intrusion or activates a response: The security system uses laser triplines.
Figuratively, triplines are sensitivities or conditions that trigger reactions: His comments hit several political triplines.
Device for catching prey
- pitfallHidden danger or drawback
- ambushSurprise strike from concealment
- entrapmentDefense against induced criminality
- triggerWhat initiates action
bait · decoy · lure · concealed · hidden · unsuspecting · sprung · activation
Urgent warning signal
- sensorInput-detecting device
- detectionAct of finding something
- perimeterShape's outer edge length
- surveillanceSystematic observation of subjects
intrusion · breach · alert · monitoring · trigger · activation · warning · unauthorized
snare
Device for catching prey
- pitfallHidden danger or drawback
- ambushSurprise strike from concealment
- entrapmentDefense against induced criminality
trigger · bait · decoy · lure · concealed · hidden · unsuspecting · sprung · activation · noose
alarm
Urgent warning signal
surveillance · intrusion · breach · alert · monitoring · trigger · activation · warning · unauthorized · trespass
boobytrap
Concealed harmful device
- claymoreScottish great sword
- minefieldExplosive-laden territory
- landmineBuried pressure-activated explosive
detonator · explosive · perimeter · tripwire · grenade · ambush · patrol · reconnaissance · guerrilla · sabotage
triplinesmotion sensors
Devices detecting physical movement
infrared sensors · radar detection · thermal imaging · LIDAR · proximity sensors
triplineswarning signs
Indicators of impending danger
guard towers · floodlights · barricades · checkpoint · security cameras
triplinessmart sensors
Self-processing detection devices
satellite surveillance · facial recognition · satellite monitoring · drone surveillance