warning indication

ground moving target indication format (GMTIF)

moving-target indication radar

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

indication of target

caution indication

target indication from an auxiliary target

error in indication

indication

visual indication

visual target indication

target indication

target indication signal

moving-target indication radar (MTI)

Warning text that appears when the battery voltage falls below warning threshold

advance warning

advance-warning satellite

air defense early warning

airborne early warning (AEW)

airborne early warning aircraft

airborne warning and control aircraft

Airborne Warning and Control System (AWACS)

distant early warning line

early warning (air defense)

early warning (EW)

early warning ground-based radar (EW GBR)

early warning radar station

early warning sharing (system) (EWS)

early warning system (EWS)

early warning system (EWS) operator

fire a warning shot

gas alarm / warning

missile attack warning