Alarm (drone)

Сигналізація (стосується дронів)

drone war (world’s first drone war)

drone field of view (drone FOV)

drone swarm attack / drone swarming attack

drone swarm's counter-drone capabilities

hobby drone (hobby grade drone)

one-way attack drone (OWA drone)

alarm placement

automatic chemical agent alarm

Doppler effect alarm

gas alarm / warning

radio alarm signal

WMD alarm (weapon of mass destruction)

air raid siren / alarm

fire extinguishing system sprinkler system and fire alarm system

assembly formation after an alarm

fire alarm bell

fire alarm light

automatic-alarm receiver

emergency alarm system

fire alarm system